Electronic fibers used to fabricate wearable triboelectric nanogenerator(TENG) for harvesting human mechanical energy have been extensively explored. However, little attention is paid to their mutual advantages of env...Electronic fibers used to fabricate wearable triboelectric nanogenerator(TENG) for harvesting human mechanical energy have been extensively explored. However, little attention is paid to their mutual advantages of environmental friendliness, mechanical properties, and stability. Here, we report a super-strong, biodegradable, and washable cellulose-based conductive macrofibers, which is prepared by wet-stretching and wet-twisting bacterial cellulose hydrogel incorporated with carbon nanotubes and polypyrrole. The cellulose-based conductive macrofibers possess high tensile strength of 449 MPa(able to lift 2 kg weights), good electrical conductivity(~ 5.32 S cm^(-1)), and excellent stability(Tensile strength and conductivity only decrease by 6.7% and 8.1% after immersing in water for 1 day). The degradation experiment demonstrates macrofibers can be degraded within 108 h in the cellulase solution. The designed fabric-based TENG from the cellulose-base conductive macrofibers shows a maximum open-circuit voltage of 170 V, short-circuit current of 0.8 μA, and output power at 352 μW, which is capable of powering the commercial electronics by charging the capacitors. More importantly, the fabric-based TENGs can be attached to the human body and work as self-powered sensors to effectively monitor human motions. This study suggests the potential of biodegradable, super-strong, and washable conductive cellulose-based fiber for designing eco-friendly fabric-based TENG for energy harvesting and biomechanical monitoring.展开更多
Hydrogel-based triboelectric nanoge nerator(TENG)has a promising applied prospect in wearable electronic devices.However,its low performance,poor stability,insufficient recyclability and inferior self-healing seriousl...Hydrogel-based triboelectric nanoge nerator(TENG)has a promising applied prospect in wearable electronic devices.However,its low performance,poor stability,insufficient recyclability and inferior self-healing seriously hinder its development.Herein,we report a robust route to a liquid metal(LM)/polyvinyl alcohol(PVA)hydrogel-based TENG(LP-TENG).Owing to the intrinsically liquid feature of conductive LM within the flexible PVA hydrogel,the as-prepared LP-TENG exhibited comprehensiye advantages of adaptability,biocompatibility,outstanding electrical performance,superior stability,recyclability and diverse applications,which were unattainable by traditional systems.Concretely,the LP-TENG delivered appealing open circuit voltage of 250 V,short circuit current of 4μA and transferred charge of 120 nC with high stability,outperforming most advanced TENG systems.The LP-TENG was successfully employed for versatile applications with multifunctionality,including human motion detection,handwriting recognition,energy collection,message transmission and human-machine interaction.This work presents significant prospects for crafting advanced materials and devices in the fields of wearable electronics,flexible skin and smart robots.展开更多
In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical challenge.To overcome this challenge,the triboelectric nano...In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical challenge.To overcome this challenge,the triboelectric nanogenerator(TENG),a highly efficient high-entropy mechanical energy harvesting device,was developed in 2012.This device enables the direct conversion of irregular and low-frequency mechanical energy into pulsed alternating current(AC)signals.However,the incompatibility of most electronic devices with AC signals necessitates rectifier circuits or generators that deliver direct current(DC)signals.In recent years,DC-TENGs have undergone extensive development,achieving significant milestones in various application fields while also facing crucial challenges that require solutions.In this review,three categories of DC-TENG devices with distinct operating mechanisms are comprehensively explored:multiphase coupling,mechanical rectification,and air breakdown.Their typical structures and working mechanisms are thoroughly discussed,and specific output performance limitations,along with corresponding optimization strategies,are identified.Furthermore,the applications of DC-TENGs in various scenarios are summarized.Finally,the challenges faced by DC-TENGs and potential solutions are analyzed to guide further advancements in this technology.展开更多
Background:This study aims to explore the therapeutic effects of the Qi Teng Mai Ning recipe on ischemic stroke and vascular cognitive impairment through its potential to modulate cellular autophagy,with a focus on id...Background:This study aims to explore the therapeutic effects of the Qi Teng Mai Ning recipe on ischemic stroke and vascular cognitive impairment through its potential to modulate cellular autophagy,with a focus on identifying its active ingredients and their target proteins.Methods:The study began with the identification of active ingredients in the Qi Teng Mai Ning recipe.It proceeded to screen the gene expression omnibus database for ischemic stroke and vascular cognitive impairment-associated differentially expressed mRNAs and to identify cellular autophagy-related proteins via the Human Autophagy Database.These proteins were annotated with Gene Ontology and Kyoto Encyclopedia of Genes and Genomes functions and subjected to molecular docking with the recipe’s core active ingredients.In vitro cell experiments were conducted on hypoxic HT22 cells,involving CCK8 assay,lentiviral transfection to silence autophagy related 9B(ATG9B),immunofluorescence staining,and qPCR validation to investigate the effects of the recipe on autophagy.Results:The analysis identified 104 active ingredients targeting 408 proteins and forming a complex ingredient-target network.Intersecting 55 ischemic stroke-related and 909 vascular cognitive impairment-related differentially expressed mRNAs revealed 14 co-expressed mRNAs.Molecular docking showed quercetin,kaempferol,myrcene,and conferone as key ingredients targeting autophagy-related proteins.Cellular experiments indicated that the recipe significantly enhanced cell viability under hypoxic conditions,reduced apoptosis,and modulated the expression of autophagy-related factors,thereby decreasing apoptosis rates in HT22 cells.Conclusion:The Qi Teng Mai Ning recipe offers protective effects against ischemic stroke and vascular cognitive impairment by modulating autophagy-related proteins.Its efficacy highlights the potential of traditional Chinese medicine in treating these conditions,though further research is needed to fully understand its mechanisms and clinical applications.展开更多
Blue energy,which includes rainfall,tidal current,wave,and water-flow energy,is a promising renewable resource,although its exploitation is limited by current technologies and thus remains low.This form of energy is m...Blue energy,which includes rainfall,tidal current,wave,and water-flow energy,is a promising renewable resource,although its exploitation is limited by current technologies and thus remains low.This form of energy is mainly harvested by electromagnetic generators(EMGs),which generate electricity via Lorenz force-driven electron flows.Triboelectric nano genera tors(TENGs)and TENG networks exhibit superiority over EMGs in low-frequency and high-entropy energy harvesting as a new approach for blue energy harvesting.A TENG produces electrical outputs by adopting the mechanism of Maxwell’s displacement current.To date,a series of research efforts have been made to optimize the structure and performance of TENGs for effective blue energy harvesting and marine environmental applications.Despite the great progress that has been achieved in the use of TENGs in this context so far,continuous exploration is required in energy conversion,device durability,power management,and environmental applications.This review reports on advances in TENGs for blue energy harvesting and marine environmental monitoring.It introduces the theoretical foundations of TENGs and discusses advanced TENG prototypes for blue energy harvesting,including TENG structures that function in freestanding and contact-separation modes.Performance enhancement strategies for TENGs intended for blue energy harvesting are also summarized.Finally,marine environmental applications of TENGs based on blue energy harvesting are discussed.展开更多
Recently,the triboelectric nanogenerator(TENG)has been widely studied for the development of flexible and wearable electronics.Among the various methods for TENG modification,melting nearfield direct writing is a new ...Recently,the triboelectric nanogenerator(TENG)has been widely studied for the development of flexible and wearable electronics.Among the various methods for TENG modification,melting nearfield direct writing is a new method to fabricate solid-liquid TENG.Here,the electrospun PCL was introduced with traditional polymers to fabricate the compound solid triboelectric layer,and water,dimethicone and GaIn were chosen as the liquid triboelectric layers.In this paper,the solid substrate effect,temperature gradient effect,and the liquid substrate effect were compared in terms of TENGs.A free-standing model of TENG is employed in this paper,and the charge generated by the PCL-PI composite solid triboelectrical solid layer is more than 10 times higher than the pristine one,showing the high charge generating ability to melt near-field direct written microfibers.Furthermore,detailed investigation will be discussed how we can get a high the out-circuit voltage and short-circuit current.展开更多
More studies have indicated that polysaccharide sulfate has anti-coagulant activity.Now,heparin is the most popular anticoagulant used in clinic,however,its side effects have also caused highly concern.It is still und...More studies have indicated that polysaccharide sulfate has anti-coagulant activity.Now,heparin is the most popular anticoagulant used in clinic,however,its side effects have also caused highly concern.It is still under intensive investigations to synthesize effective safe polysaccharide sulfate as heparin substitute.We extracted water-soluble polysaccharide from fermented mycelium of edible polyporus albicans（Imaz.） teng,and got the water-soluble polyporus albicans teng sulfate（PATS） by modifying the water-solubility polyose with the method of chlorosulfonic acid-pyridine.The anti-coagulant assay of PATS in vitro towards normal human plasma indicates its remarkable anticoagulant activity,while the dose could be as low as 5 mg/L for anticoagulation.The anti-coagulant effect was equivalent to that of heparin about 150 U when the concentration of PATS was 10 mg/L.The study on anti-coagulation mechanism suggests that PATS got involved in the intrinsic pathway.The anti-coagulation activity of PATS was due to the inhibition of the coagulation factors IIa and Xa activities mediated by antithrombin Ⅲ（ATIII）.The anti-coagulation mechanism of PATS is absolutely identical to that of heparin.In conclusion,we suggest that PATS has the similar anti-coagulation characteristic to heparin,but with a better anti-coagulation effect.Meanwhile,derived from edible fungus-polysaccharide,PATS has more bio-safety advantage.Therefore,PATS has promising future to be developed and used as an ideal substitute for heparin in clinic.展开更多
Harvesting energy from ambient environment has been considered as a promising strategy for driving portable electronic devices in a sustainable way. A wind driven triboelectric-electromagnetic hybrid nanogenerator has...Harvesting energy from ambient environment has been considered as a promising strategy for driving portable electronic devices in a sustainable way. A wind driven triboelectric-electromagnetic hybrid nanogenerator has been fabricated to convert wind energy into electricity. It is composed of an electromagnetic generator(EMG) and a triboelectric nanogenerator(TENG) with the output power of 35 and 0.32 mW, respectively when the wind speed is 5 m/s. Generally, TENG shows a low current output with a high voltage output characteristic, on the contrary the EMG shows a high current output and a low voltage output. This hybrid nanogenerator overcomes these problems and exhibits comprehensive and efficient performance on scavenging energy.Moreover, in view of the output performance and charging ability of the hybrid nanogenerator, it shows high stability, making it suitable for charging capacitors or batteries and driving portable electronics sustainably. A new structure of integrated TENG and EMG was designed to harvest wind energy, which shows potential applications in portable and small device power supply system, especially in the areas of remote mountains, deserts, islands, etc., as emergency power supply.展开更多
Objective： By applying moxibustion to the eight confluent points in different periods of time, to observe the changes in thermal pain threshold latency of acupoints based on Fei Teng Ba Fa. Methods： A total of 468 h...Objective： By applying moxibustion to the eight confluent points in different periods of time, to observe the changes in thermal pain threshold latency of acupoints based on Fei Teng Ba Fa. Methods： A total of 468 healthy college student volunteers received moxibustion at the eight confluent points in three different periods of time, i.e. Chen （7：00-9：00）, Wu （11：00-13：00） and Xu （19：00-21：00）. The thermal pain threshold latency was adopted to measure the changes in pain threshold of the eight confluent points under different conditions （different periods of time, different genders, different acupoints and different states of the acupoints） based on Fei Teng Ba Fa. Results： Finally, thirty subjects dropped out and 438 subjects were included. The comparison of thermal pain threshold latencies of the eight confluent points in the same opening or closing state based on Fei Teng Ba Fa： latencies of the closing points and adjunct points were significantly different in different periods of time （P〈0.05）, the latencies of the males were significantly longer than those of the females （P〈0.05）; there was no significant difference in the latency between the left and right sides （P〉0.05）; in the female group, there was a significant difference in the latency between the lower-limb points and the upper-limb points （P〈0.05）. The comparison of thermal point threshold latencies of the eight confluent points in different opening or closing state： in the period of Wu （11：00-13：00）, the latencies of the opening points were significantly longer than those of the closing points and adjunct points （P〈0.05）; for men, their opening and closing points had significantly longer thermal pain threshold latencies than their adjunct points （P〈0.05）; despite the gender, the latencies of the upper limb opening and closing points were significantly longer than the latency of the adjunct points （P〈0.05）; in the female group, the latencies of the lower-limb ope展开更多
The recent development on wearable and stretchable electronics calls for skin conformable power sources that are beyond current battery technologies.Among the many novel energy devices being explored,triboelectric nan...The recent development on wearable and stretchable electronics calls for skin conformable power sources that are beyond current battery technologies.Among the many novel energy devices being explored,triboelectric nanogenerator(TENG)made from intrinsically stretchable materials has a great potential to meet the above requirement as being both soft and efficient.In this paper,we present a lithography-free and low-cost TENG device comprising a porous-structured PDMS layer and a stretchable PEDOT:PSS electrode.The porous PDMS structure is formed by using self-assembled polystyrene beads as the sacrificial template and it is highly ordered with great uniformity and high structural stability under compression force.Moreover,the porous PDMS TENG exhibits improved output voltage and current of 1.65 V and 0.54 nA compared to its counterpart with non-porous PDMS with 0.66 V and 0.34 nA.The effect of different loading force and frequency on the output response of the TENG device has also been studied.This work could shed light on diverse structural modification methods for improving the performance of PDMS-based TENG and the development of intrinsically stretchable TENG for wearable device applications.展开更多
Contact electrification is a direct triboelectrification method for producing current through charge transfer when two different differentiated materials have brought into contact.For the first time,we developed a sim...Contact electrification is a direct triboelectrification method for producing current through charge transfer when two different differentiated materials have brought into contact.For the first time,we developed a simple triboelectric nanogenerator(TENG)where the electronic charges were realized through contact separation mode between sand-polished Kapton(SPK)and Al surface.Here,we demonstrated the energetic interfacial contact between these surfaces and observed satisfactory output performance.The novel SPK-TENG produced 40 V and 2.8μA,of open-circuit voltages(V_(oc))and short-circuit currents(Isc)at 4 Hz,respectively.Mainly,the SPK-TENG was dramatically increased up the performance of TENG,up to 40% of V_(oc) and 42% of I_(sc),with respect to the Kapton film because the mobility of electrons is very high on the device surface compared to the other pristine Kapton film.The fabricated SPK-TENGs were good candidates for satisfying the need for alternative contact separation mode TENGs.展开更多
基金financially supported by BRICS STI Framework Programme 3rd call 2019the National Key Research and Development Program of China(Grant No.2018YFE0123700)+3 种基金the National Natural Science Foundation of China(Grant Nos.51973076 and 52073031)State Key Laboratory of New Textile Materials and Advanced Processing Technologies(Grant No.FZ2021005)the Fundamental Research Funds for the Central Universities(Grant Nos.2020kfyXJJS035,WUT2018IVB006,and Z191100001119047)。
文摘Electronic fibers used to fabricate wearable triboelectric nanogenerator(TENG) for harvesting human mechanical energy have been extensively explored. However, little attention is paid to their mutual advantages of environmental friendliness, mechanical properties, and stability. Here, we report a super-strong, biodegradable, and washable cellulose-based conductive macrofibers, which is prepared by wet-stretching and wet-twisting bacterial cellulose hydrogel incorporated with carbon nanotubes and polypyrrole. The cellulose-based conductive macrofibers possess high tensile strength of 449 MPa(able to lift 2 kg weights), good electrical conductivity(~ 5.32 S cm^(-1)), and excellent stability(Tensile strength and conductivity only decrease by 6.7% and 8.1% after immersing in water for 1 day). The degradation experiment demonstrates macrofibers can be degraded within 108 h in the cellulase solution. The designed fabric-based TENG from the cellulose-base conductive macrofibers shows a maximum open-circuit voltage of 170 V, short-circuit current of 0.8 μA, and output power at 352 μW, which is capable of powering the commercial electronics by charging the capacitors. More importantly, the fabric-based TENGs can be attached to the human body and work as self-powered sensors to effectively monitor human motions. This study suggests the potential of biodegradable, super-strong, and washable conductive cellulose-based fiber for designing eco-friendly fabric-based TENG for energy harvesting and biomechanical monitoring.
基金financially supported by the Natural Science Foundation of China(Nos.22109120,62104170 and 82202757)Zhejiang Provincial Natural Science Foundation of China(Nos.LQ21B030002 and LY23F040001)。
文摘Hydrogel-based triboelectric nanoge nerator(TENG)has a promising applied prospect in wearable electronic devices.However,its low performance,poor stability,insufficient recyclability and inferior self-healing seriously hinder its development.Herein,we report a robust route to a liquid metal(LM)/polyvinyl alcohol(PVA)hydrogel-based TENG(LP-TENG).Owing to the intrinsically liquid feature of conductive LM within the flexible PVA hydrogel,the as-prepared LP-TENG exhibited comprehensiye advantages of adaptability,biocompatibility,outstanding electrical performance,superior stability,recyclability and diverse applications,which were unattainable by traditional systems.Concretely,the LP-TENG delivered appealing open circuit voltage of 250 V,short circuit current of 4μA and transferred charge of 120 nC with high stability,outperforming most advanced TENG systems.The LP-TENG was successfully employed for versatile applications with multifunctionality,including human motion detection,handwriting recognition,energy collection,message transmission and human-machine interaction.This work presents significant prospects for crafting advanced materials and devices in the fields of wearable electronics,flexible skin and smart robots.
基金supported by the Postdoctoral Science Foundation(Grant No.2023M730419)the Ministry of Education“Chunhui Plan”Cooperative Scientific Research Project(Grant No.HZKY20220206)+2 种基金the Scientific and Technology Research Program of Chongqing Municipal Education Commission(Grant Nos.KJQN202100522,KJQN202200514 and KJQN202100514)the Natural Science Foundation of Chongqing(Grant No.cstc2021jcyj-msxmX0746)the Dr.“Through Train”Scientific Research Program(Grant No.CSTB2022BSXM-JCX0091)。
文摘In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical challenge.To overcome this challenge,the triboelectric nanogenerator(TENG),a highly efficient high-entropy mechanical energy harvesting device,was developed in 2012.This device enables the direct conversion of irregular and low-frequency mechanical energy into pulsed alternating current(AC)signals.However,the incompatibility of most electronic devices with AC signals necessitates rectifier circuits or generators that deliver direct current(DC)signals.In recent years,DC-TENGs have undergone extensive development,achieving significant milestones in various application fields while also facing crucial challenges that require solutions.In this review,three categories of DC-TENG devices with distinct operating mechanisms are comprehensively explored:multiphase coupling,mechanical rectification,and air breakdown.Their typical structures and working mechanisms are thoroughly discussed,and specific output performance limitations,along with corresponding optimization strategies,are identified.Furthermore,the applications of DC-TENGs in various scenarios are summarized.Finally,the challenges faced by DC-TENGs and potential solutions are analyzed to guide further advancements in this technology.
文摘Background:This study aims to explore the therapeutic effects of the Qi Teng Mai Ning recipe on ischemic stroke and vascular cognitive impairment through its potential to modulate cellular autophagy,with a focus on identifying its active ingredients and their target proteins.Methods:The study began with the identification of active ingredients in the Qi Teng Mai Ning recipe.It proceeded to screen the gene expression omnibus database for ischemic stroke and vascular cognitive impairment-associated differentially expressed mRNAs and to identify cellular autophagy-related proteins via the Human Autophagy Database.These proteins were annotated with Gene Ontology and Kyoto Encyclopedia of Genes and Genomes functions and subjected to molecular docking with the recipe’s core active ingredients.In vitro cell experiments were conducted on hypoxic HT22 cells,involving CCK8 assay,lentiviral transfection to silence autophagy related 9B(ATG9B),immunofluorescence staining,and qPCR validation to investigate the effects of the recipe on autophagy.Results:The analysis identified 104 active ingredients targeting 408 proteins and forming a complex ingredient-target network.Intersecting 55 ischemic stroke-related and 909 vascular cognitive impairment-related differentially expressed mRNAs revealed 14 co-expressed mRNAs.Molecular docking showed quercetin,kaempferol,myrcene,and conferone as key ingredients targeting autophagy-related proteins.Cellular experiments indicated that the recipe significantly enhanced cell viability under hypoxic conditions,reduced apoptosis,and modulated the expression of autophagy-related factors,thereby decreasing apoptosis rates in HT22 cells.Conclusion:The Qi Teng Mai Ning recipe offers protective effects against ischemic stroke and vascular cognitive impairment by modulating autophagy-related proteins.Its efficacy highlights the potential of traditional Chinese medicine in treating these conditions,though further research is needed to fully understand its mechanisms and clinical applications.
基金the National Key Research and Development Project from the Minister of Science and Technology(2021YFA1201601 and 2021YFA1201604)the Innovation Project of Ocean Science and Technology(22-3-3-hygg-18-hy)+2 种基金the project supported by the Fundamental Research Funds for the Central Universities(E2E46805)the China National Postdoctoral Program for Innovative Talents(BX20220292)the China Postdoctoral Science Foundation(2022M723100)。
文摘Blue energy,which includes rainfall,tidal current,wave,and water-flow energy,is a promising renewable resource,although its exploitation is limited by current technologies and thus remains low.This form of energy is mainly harvested by electromagnetic generators(EMGs),which generate electricity via Lorenz force-driven electron flows.Triboelectric nano genera tors(TENGs)and TENG networks exhibit superiority over EMGs in low-frequency and high-entropy energy harvesting as a new approach for blue energy harvesting.A TENG produces electrical outputs by adopting the mechanism of Maxwell’s displacement current.To date,a series of research efforts have been made to optimize the structure and performance of TENGs for effective blue energy harvesting and marine environmental applications.Despite the great progress that has been achieved in the use of TENGs in this context so far,continuous exploration is required in energy conversion,device durability,power management,and environmental applications.This review reports on advances in TENGs for blue energy harvesting and marine environmental monitoring.It introduces the theoretical foundations of TENGs and discusses advanced TENG prototypes for blue energy harvesting,including TENG structures that function in freestanding and contact-separation modes.Performance enhancement strategies for TENGs intended for blue energy harvesting are also summarized.Finally,marine environmental applications of TENGs based on blue energy harvesting are discussed.
基金the the opening fund of Key Laboratory of Science and Technology on Silicon Devices,Chinese Academy of Sciences[KLSDTJJ2022-5]the National Key Research and Development Program of China[2020YFE0205304]+2 种基金Natural Science Foundation of Chongqing,China[cstc2021jcyj-msxmX1002]the Fundamental Research Funds for the Central Universities[AUGA5710051221]Heilongjiang Provincial Natural Science Foundation of China[YQ2022E024].
文摘Recently,the triboelectric nanogenerator(TENG)has been widely studied for the development of flexible and wearable electronics.Among the various methods for TENG modification,melting nearfield direct writing is a new method to fabricate solid-liquid TENG.Here,the electrospun PCL was introduced with traditional polymers to fabricate the compound solid triboelectric layer,and water,dimethicone and GaIn were chosen as the liquid triboelectric layers.In this paper,the solid substrate effect,temperature gradient effect,and the liquid substrate effect were compared in terms of TENGs.A free-standing model of TENG is employed in this paper,and the charge generated by the PCL-PI composite solid triboelectrical solid layer is more than 10 times higher than the pristine one,showing the high charge generating ability to melt near-field direct written microfibers.Furthermore,detailed investigation will be discussed how we can get a high the out-circuit voltage and short-circuit current.
文摘More studies have indicated that polysaccharide sulfate has anti-coagulant activity.Now,heparin is the most popular anticoagulant used in clinic,however,its side effects have also caused highly concern.It is still under intensive investigations to synthesize effective safe polysaccharide sulfate as heparin substitute.We extracted water-soluble polysaccharide from fermented mycelium of edible polyporus albicans（Imaz.） teng,and got the water-soluble polyporus albicans teng sulfate（PATS） by modifying the water-solubility polyose with the method of chlorosulfonic acid-pyridine.The anti-coagulant assay of PATS in vitro towards normal human plasma indicates its remarkable anticoagulant activity,while the dose could be as low as 5 mg/L for anticoagulation.The anti-coagulant effect was equivalent to that of heparin about 150 U when the concentration of PATS was 10 mg/L.The study on anti-coagulation mechanism suggests that PATS got involved in the intrinsic pathway.The anti-coagulation activity of PATS was due to the inhibition of the coagulation factors IIa and Xa activities mediated by antithrombin Ⅲ（ATIII）.The anti-coagulation mechanism of PATS is absolutely identical to that of heparin.In conclusion,we suggest that PATS has the similar anti-coagulation characteristic to heparin,but with a better anti-coagulation effect.Meanwhile,derived from edible fungus-polysaccharide,PATS has more bio-safety advantage.Therefore,PATS has promising future to be developed and used as an ideal substitute for heparin in clinic.
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.51722510,51905518 and 21603242)the Program for Taishan Scholars of Shandong Province(Grant No.ts20190965)+1 种基金the Key Research Project of Frontier Science of the Chinese Academy of Sciences(Grant No.QYZDY-SSW-JSC013)the“Innovation Leading Talents”Program of Qingdao in China(Grant No.19-3-2-23-zhc)。
文摘Harvesting energy from ambient environment has been considered as a promising strategy for driving portable electronic devices in a sustainable way. A wind driven triboelectric-electromagnetic hybrid nanogenerator has been fabricated to convert wind energy into electricity. It is composed of an electromagnetic generator(EMG) and a triboelectric nanogenerator(TENG) with the output power of 35 and 0.32 mW, respectively when the wind speed is 5 m/s. Generally, TENG shows a low current output with a high voltage output characteristic, on the contrary the EMG shows a high current output and a low voltage output. This hybrid nanogenerator overcomes these problems and exhibits comprehensive and efficient performance on scavenging energy.Moreover, in view of the output performance and charging ability of the hybrid nanogenerator, it shows high stability, making it suitable for charging capacitors or batteries and driving portable electronics sustainably. A new structure of integrated TENG and EMG was designed to harvest wind energy, which shows potential applications in portable and small device power supply system, especially in the areas of remote mountains, deserts, islands, etc., as emergency power supply.
文摘Objective： By applying moxibustion to the eight confluent points in different periods of time, to observe the changes in thermal pain threshold latency of acupoints based on Fei Teng Ba Fa. Methods： A total of 468 healthy college student volunteers received moxibustion at the eight confluent points in three different periods of time, i.e. Chen （7：00-9：00）, Wu （11：00-13：00） and Xu （19：00-21：00）. The thermal pain threshold latency was adopted to measure the changes in pain threshold of the eight confluent points under different conditions （different periods of time, different genders, different acupoints and different states of the acupoints） based on Fei Teng Ba Fa. Results： Finally, thirty subjects dropped out and 438 subjects were included. The comparison of thermal pain threshold latencies of the eight confluent points in the same opening or closing state based on Fei Teng Ba Fa： latencies of the closing points and adjunct points were significantly different in different periods of time （P〈0.05）, the latencies of the males were significantly longer than those of the females （P〈0.05）; there was no significant difference in the latency between the left and right sides （P〉0.05）; in the female group, there was a significant difference in the latency between the lower-limb points and the upper-limb points （P〈0.05）. The comparison of thermal point threshold latencies of the eight confluent points in different opening or closing state： in the period of Wu （11：00-13：00）, the latencies of the opening points were significantly longer than those of the closing points and adjunct points （P〈0.05）; for men, their opening and closing points had significantly longer thermal pain threshold latencies than their adjunct points （P〈0.05）; despite the gender, the latencies of the upper limb opening and closing points were significantly longer than the latency of the adjunct points （P〈0.05）; in the female group, the latencies of the lower-limb ope
基金partially funded by a Washington University Collaboration Initiation Grant (CIG)a Michigan State University Foundation Strategic Partnership Grant (16SPG-Full-3236)
文摘The recent development on wearable and stretchable electronics calls for skin conformable power sources that are beyond current battery technologies.Among the many novel energy devices being explored,triboelectric nanogenerator(TENG)made from intrinsically stretchable materials has a great potential to meet the above requirement as being both soft and efficient.In this paper,we present a lithography-free and low-cost TENG device comprising a porous-structured PDMS layer and a stretchable PEDOT:PSS electrode.The porous PDMS structure is formed by using self-assembled polystyrene beads as the sacrificial template and it is highly ordered with great uniformity and high structural stability under compression force.Moreover,the porous PDMS TENG exhibits improved output voltage and current of 1.65 V and 0.54 nA compared to its counterpart with non-porous PDMS with 0.66 V and 0.34 nA.The effect of different loading force and frequency on the output response of the TENG device has also been studied.This work could shed light on diverse structural modification methods for improving the performance of PDMS-based TENG and the development of intrinsically stretchable TENG for wearable device applications.
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIP No.2017R1A2B2011730,No.2018R1A6A1A03024509 and No.2019R1A2C1011113).
文摘Contact electrification is a direct triboelectrification method for producing current through charge transfer when two different differentiated materials have brought into contact.For the first time,we developed a simple triboelectric nanogenerator(TENG)where the electronic charges were realized through contact separation mode between sand-polished Kapton(SPK)and Al surface.Here,we demonstrated the energetic interfacial contact between these surfaces and observed satisfactory output performance.The novel SPK-TENG produced 40 V and 2.8μA,of open-circuit voltages(V_(oc))and short-circuit currents(Isc)at 4 Hz,respectively.Mainly,the SPK-TENG was dramatically increased up the performance of TENG,up to 40% of V_(oc) and 42% of I_(sc),with respect to the Kapton film because the mobility of electrons is very high on the device surface compared to the other pristine Kapton film.The fabricated SPK-TENGs were good candidates for satisfying the need for alternative contact separation mode TENGs.
