Ionogels with high transparency,stretchability and self-healing capability show great potential for wearable electronics.Here,a kind of highly transparent,stretchable and self-healable ionogels are designed using doub...Ionogels with high transparency,stretchability and self-healing capability show great potential for wearable electronics.Here,a kind of highly transparent,stretchable and self-healable ionogels are designed using double physical cross-linking including hydrogen bonding and dipole–dipole interaction.Owing to the dynamic and reversible nature of the ion–dipole interaction and hydrogen bonds of polymeric chains,the ionogel possesses good self-healing capability.The multifunctional sensors for strain and temperature are fabricated based on ionogel.The ionogel can serve as strain sensor that exhibited high sensitivity[gauge factor(GF)=3.06]and durability(1000 cycles)to a wide range of strains(0–300%).Meanwhile,the ionogel shows rapid response to temperature,due to the temperature dependence of its ionic conductivity.Furthermore,the ionogel fbers with excellent antifreezing(−20°C)capability are fabricated,and the fbers show the good sensing performance to human motions and temperature.Importantly,the antifreezing ionogel-based triboelectric nanogenerator(ITENG)is assembled for efcient energy harvesting.The ITENG shows a short circuit current(ISC)of 6.1μA,open circuit voltage(VOC)of 115 V,and instantaneous peak power density of 334 mW m−2.This work provides a new strategy to design ionogels for the advancement of wearable electronics.展开更多
目的:通过对近10年中国发表的真实世界临床研究相关文献进行分析,试图展现这一时期国内真实世界临床研究的基本情况、热点和前沿趋势。方法:计算机检索国家知识基础设施数据库(CNKI)、中文科技期刊数据库(CCD)、中国学术期刊数据库(CSPD...目的:通过对近10年中国发表的真实世界临床研究相关文献进行分析,试图展现这一时期国内真实世界临床研究的基本情况、热点和前沿趋势。方法:计算机检索国家知识基础设施数据库(CNKI)、中文科技期刊数据库(CCD)、中国学术期刊数据库(CSPD)、SinoMed、Web of science及Pubmed等数据库有关国内学者发表的关于真实世界临床研究的文章,时间从2011年9月至2021年9月,运用文献计量工具CiteSpace进行数据挖掘,在中华中医药学会、世界中医药学会联合会、国家药品监督管理局以及美国FDA等网站查找近10年发表的有关真实世界的规范性文件。结果:共纳入有效文献1525篇,文献发表整体呈现增长趋势,研究范围较广,关键词演化分析表明研究热点主要集中于中药注射剂疗效分析和基于医疗大数据的临床用药特征分析等方面,研究设计类型主要是观察性研究。结论:通过梳理国内真实世界临床研究的发展脉络、方法学、政策支持和证据评估方法,有助于研究人员和临床医生更好地了解真实世界临床研究和提高真实世界证据质量,以期为我国开展高质量真实世界临床研究提供借鉴。展开更多
Stretchable ionic conductors with high transparency and excellent resilience are highly desired for flexible electronics,but traditional ionic conductive hydrogels are easy to dry and freeze.Herein,a newly hybrid cros...Stretchable ionic conductors with high transparency and excellent resilience are highly desired for flexible electronics,but traditional ionic conductive hydrogels are easy to dry and freeze.Herein,a newly hybrid crosslinking strategy is presented for preparing a stretchable and transparent hydrogel by using sodium alginate(SA)and acrylamide based on the unique physically and covalently hybrid crosslinking mechanism,which is transformed into organohydrogel by simple solvent replacement.Due to the combination of hybrid crosslinking double network and hydrogen bond interactions introduced by the glycerin-water binary solvent,the SA-poly(acrylamide)-organohydrogel(SPOH)demonstrates excellent anti-freezing(-20℃)property,stability(>2 days),transparency,stretchability(~1600%)and high ionic conductivity(17.1 mS cm^(-1)).Thus,a triboelectric nanogenerator made from SPOH(O-TENG)shows an instantaneous peak power density of 262 mW m^(-2)at a load resistance of 10 MΩand efficiently harvests biomechanical energy to drive an electronic watch and light-emitting diode.Moreover,The O-TENG exhibits favorable long-term stability(2 weeks)and temperature tolerance(-20℃).In addition,the raw materials can be prepared into SPOH fibers by a simple tubular mold method,exhibiting high transparency,which can be used for laser transmission.The various abilities of the SPOH promise the application of energy harvesting and laser transmission for wearable electronics and biomedical field.展开更多
基金This work was supported by the National Natural Science Foundation of China(21991123 and 52073049)the Natural Science Foundation of Shanghai(20ZR1402500 and 18ZR1401900)+5 种基金Shanghai Rising-Star Program(20520741000)Belt&Road Young Scientist Exchanges Project of Science and Technology Commission Foundation of Shanghai(20520741000)the Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-dimension Materials(Donghua University)(18520750400)the Fundamental Research Funds for the Central Universities(2232021G-02)DHU Distinguished Young Professor Program(LZA2019001)the Science and Technology Commission of Shanghai(17DZ2260100).
文摘Ionogels with high transparency,stretchability and self-healing capability show great potential for wearable electronics.Here,a kind of highly transparent,stretchable and self-healable ionogels are designed using double physical cross-linking including hydrogen bonding and dipole–dipole interaction.Owing to the dynamic and reversible nature of the ion–dipole interaction and hydrogen bonds of polymeric chains,the ionogel possesses good self-healing capability.The multifunctional sensors for strain and temperature are fabricated based on ionogel.The ionogel can serve as strain sensor that exhibited high sensitivity[gauge factor(GF)=3.06]and durability(1000 cycles)to a wide range of strains(0–300%).Meanwhile,the ionogel shows rapid response to temperature,due to the temperature dependence of its ionic conductivity.Furthermore,the ionogel fbers with excellent antifreezing(−20°C)capability are fabricated,and the fbers show the good sensing performance to human motions and temperature.Importantly,the antifreezing ionogel-based triboelectric nanogenerator(ITENG)is assembled for efcient energy harvesting.The ITENG shows a short circuit current(ISC)of 6.1μA,open circuit voltage(VOC)of 115 V,and instantaneous peak power density of 334 mW m−2.This work provides a new strategy to design ionogels for the advancement of wearable electronics.
文摘目的:通过对近10年中国发表的真实世界临床研究相关文献进行分析,试图展现这一时期国内真实世界临床研究的基本情况、热点和前沿趋势。方法:计算机检索国家知识基础设施数据库(CNKI)、中文科技期刊数据库(CCD)、中国学术期刊数据库(CSPD)、SinoMed、Web of science及Pubmed等数据库有关国内学者发表的关于真实世界临床研究的文章,时间从2011年9月至2021年9月,运用文献计量工具CiteSpace进行数据挖掘,在中华中医药学会、世界中医药学会联合会、国家药品监督管理局以及美国FDA等网站查找近10年发表的有关真实世界的规范性文件。结果:共纳入有效文献1525篇,文献发表整体呈现增长趋势,研究范围较广,关键词演化分析表明研究热点主要集中于中药注射剂疗效分析和基于医疗大数据的临床用药特征分析等方面,研究设计类型主要是观察性研究。结论:通过梳理国内真实世界临床研究的发展脉络、方法学、政策支持和证据评估方法,有助于研究人员和临床医生更好地了解真实世界临床研究和提高真实世界证据质量,以期为我国开展高质量真实世界临床研究提供借鉴。
基金financially supported by the National Natural Science Foundation of China(52002059 and 51872204)the Belt&Road Young Scientist Exchanges Project of Science and Technology Commission Foundation of Shanghai(20520741000)+1 种基金the Fundamental Research Funds for the Central Universities(20D110631)the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(DonghuaUniversity,KF2019)。
文摘Stretchable ionic conductors with high transparency and excellent resilience are highly desired for flexible electronics,but traditional ionic conductive hydrogels are easy to dry and freeze.Herein,a newly hybrid crosslinking strategy is presented for preparing a stretchable and transparent hydrogel by using sodium alginate(SA)and acrylamide based on the unique physically and covalently hybrid crosslinking mechanism,which is transformed into organohydrogel by simple solvent replacement.Due to the combination of hybrid crosslinking double network and hydrogen bond interactions introduced by the glycerin-water binary solvent,the SA-poly(acrylamide)-organohydrogel(SPOH)demonstrates excellent anti-freezing(-20℃)property,stability(>2 days),transparency,stretchability(~1600%)and high ionic conductivity(17.1 mS cm^(-1)).Thus,a triboelectric nanogenerator made from SPOH(O-TENG)shows an instantaneous peak power density of 262 mW m^(-2)at a load resistance of 10 MΩand efficiently harvests biomechanical energy to drive an electronic watch and light-emitting diode.Moreover,The O-TENG exhibits favorable long-term stability(2 weeks)and temperature tolerance(-20℃).In addition,the raw materials can be prepared into SPOH fibers by a simple tubular mold method,exhibiting high transparency,which can be used for laser transmission.The various abilities of the SPOH promise the application of energy harvesting and laser transmission for wearable electronics and biomedical field.
