Perovskite solar cells(PSCs)have attracted intense attention based on their high power conversion efficiency and low production cost.However,due to the polycrystalline nature and the intrinsic hydrophilicity of the me...Perovskite solar cells(PSCs)have attracted intense attention based on their high power conversion efficiency and low production cost.However,due to the polycrystalline nature and the intrinsic hydrophilicity of the metal halide perovskite moieties,the photovoltaic performance of PSCs is largely limited by defects within the polycrystalline perovskites and the sensitivity to moisture.In this perspective,we focus on the chemically tailored interface materials to passivate the defects and improve the moisture stability of PSCs.First,we provide a brief overview of various molecular interface modifiers.Thereafter we provide examples from our recent work on organic ammonium halide‐based passivation materials as representatives to illustrate the design strategies and the modification effects.In the end,we shed light on the future devel-opment of organic ammonium halides for applications in PSCs.展开更多
The response of human osteoblast-like osteosarcoma cells （MG63） to surface modification of Ti-6Al-4V implant alloy was investigated by Laser Interference Lithography （LIL）. In this work, laser interference lithogr...The response of human osteoblast-like osteosarcoma cells （MG63） to surface modification of Ti-6Al-4V implant alloy was investigated by Laser Interference Lithography （LIL）. In this work, laser interference lithography was employed to fabricate the microstructures of grooves, dots and dimples onto the surfaces of Ti-6Al-4V samples. Two and three beam LIL systems were developed to carry out the experiments. The laser treatment resulted in the increases of the roughness and the contact angle of water on the implant alloy surfaces. The proliferation of osteoblasts was analyzed by MTT （3-（4,5-dirnethyl- 2-thiazolyl）-2,5-diphenyl-2-H-tetrazolium bromide） assay for the time periods of 4 hours, 2 days, 3 days, and 6 days. The MTT test results demonstrated that the laser treatment surfaces had a positive impact on the proliferation of os- teoblast cells after 24 hours. The alloy surface morphology and the morphological changes of MG63 cells cultured on the laser textured Ti-6Al-4V surface were observed by Scanning Electron Microscope （SEM）. The SEM results indicated that the os- teoblast cells were aligned on grooved surfaces and they were prolonged with the structures. Enzymatic detachment results showed that the 20 μm grooved structures provided the better cell adhesion to the textured Ti-6Al-4V surfaces.展开更多
为了研究植物乳杆菌材料对黄曲霉毒素去除新方法,为黄曲霉毒素B_(1)的高效生物去除提供了新思路。本文采用基于聚多巴胺的原子转移自由基聚合方法(Polydopamine-based Atom Transfer Radical Polymerization,p-ATRP)和细胞自催化的无铜...为了研究植物乳杆菌材料对黄曲霉毒素去除新方法,为黄曲霉毒素B_(1)的高效生物去除提供了新思路。本文采用基于聚多巴胺的原子转移自由基聚合方法(Polydopamine-based Atom Transfer Radical Polymerization,p-ATRP)和细胞自催化的无铜添加原子转移自由基聚合方法(Cell-catalyzed Copper-free Atom Transfer Radical Polymerization,c-ATRP)对植物乳杆菌活细胞表面进行修饰,引导原子转移自由基聚合(Atom Transfer Radical Polymerization,ATRP)体系自组装聚合反应形成聚合物材料,对修饰后的植物乳杆菌进行表征,并比较修饰前后植物乳杆菌对黄曲霉毒素B_(1)吸附脱附能力。结果表明,未修饰的植物乳杆菌,细胞表面圆润光滑,经过p-ATRP修饰后的植物乳杆菌,细胞表面变得极为粗糙,经过c-ATRP修饰后的植物乳杆菌,细胞表面出现褶皱;未修饰的植物乳杆菌的Zeta点位为-8.43 mV,经过Dopamine和PNIPAAm修饰后的植物乳杆菌点位分别为1.791和13.767 mV;植物乳杆菌在0.1~100μg/mL黄曲霉毒素B_(1)吸附率为75.3%,p-ATRP和c-ATRP修饰的植物乳杆菌比未修饰的植物乳杆菌吸附能力分别提高了7.8%和6.4%。在相同黄曲霉毒素B_(1)浓度下,植物乳杆菌脱附率为6.1%,p-ATRP和c-ATRP修饰的植物乳杆菌脱附能力分别提高了14.4%和42%。经过修饰后的植物乳杆菌显著提升了植物乳杆菌对黄曲霉毒素的吸附和脱附能力。展开更多
基金Higher Education Discipline Innovation Project,Grant/Award Number:B16027National Thousand Talent Program for Young Professionals。
文摘Perovskite solar cells(PSCs)have attracted intense attention based on their high power conversion efficiency and low production cost.However,due to the polycrystalline nature and the intrinsic hydrophilicity of the metal halide perovskite moieties,the photovoltaic performance of PSCs is largely limited by defects within the polycrystalline perovskites and the sensitivity to moisture.In this perspective,we focus on the chemically tailored interface materials to passivate the defects and improve the moisture stability of PSCs.First,we provide a brief overview of various molecular interface modifiers.Thereafter we provide examples from our recent work on organic ammonium halide‐based passivation materials as representatives to illustrate the design strategies and the modification effects.In the end,we shed light on the future devel-opment of organic ammonium halides for applications in PSCs.
基金This work was supported by National Key Basic Research Program of China （973 Program No. 2012CB326406）, EU FP7 （BioRA）, China-EU H2020 （FabSurfWAR Nos. 2016YFE0112100 and 644971）, International Science and Technology Cooperation Program of China （No. 2012DFAlI070）, National Natural Science Foundation Program of China （Nos. 61176002, 11103047 and 11504030）, Jilin Provincial Science and Technology Program （20140414009GH, 20140622009JC, 20140414009GH, 20160520101JH, 20160101318JC and 20160623002TC）, and Frontier lnterdiscipline Program of Norman Bethune Health Science Center of Jilin University （No. 2013107025）.
文摘The response of human osteoblast-like osteosarcoma cells （MG63） to surface modification of Ti-6Al-4V implant alloy was investigated by Laser Interference Lithography （LIL）. In this work, laser interference lithography was employed to fabricate the microstructures of grooves, dots and dimples onto the surfaces of Ti-6Al-4V samples. Two and three beam LIL systems were developed to carry out the experiments. The laser treatment resulted in the increases of the roughness and the contact angle of water on the implant alloy surfaces. The proliferation of osteoblasts was analyzed by MTT （3-（4,5-dirnethyl- 2-thiazolyl）-2,5-diphenyl-2-H-tetrazolium bromide） assay for the time periods of 4 hours, 2 days, 3 days, and 6 days. The MTT test results demonstrated that the laser treatment surfaces had a positive impact on the proliferation of os- teoblast cells after 24 hours. The alloy surface morphology and the morphological changes of MG63 cells cultured on the laser textured Ti-6Al-4V surface were observed by Scanning Electron Microscope （SEM）. The SEM results indicated that the os- teoblast cells were aligned on grooved surfaces and they were prolonged with the structures. Enzymatic detachment results showed that the 20 μm grooved structures provided the better cell adhesion to the textured Ti-6Al-4V surfaces.
文摘为了研究植物乳杆菌材料对黄曲霉毒素去除新方法,为黄曲霉毒素B_(1)的高效生物去除提供了新思路。本文采用基于聚多巴胺的原子转移自由基聚合方法(Polydopamine-based Atom Transfer Radical Polymerization,p-ATRP)和细胞自催化的无铜添加原子转移自由基聚合方法(Cell-catalyzed Copper-free Atom Transfer Radical Polymerization,c-ATRP)对植物乳杆菌活细胞表面进行修饰,引导原子转移自由基聚合(Atom Transfer Radical Polymerization,ATRP)体系自组装聚合反应形成聚合物材料,对修饰后的植物乳杆菌进行表征,并比较修饰前后植物乳杆菌对黄曲霉毒素B_(1)吸附脱附能力。结果表明,未修饰的植物乳杆菌,细胞表面圆润光滑,经过p-ATRP修饰后的植物乳杆菌,细胞表面变得极为粗糙,经过c-ATRP修饰后的植物乳杆菌,细胞表面出现褶皱;未修饰的植物乳杆菌的Zeta点位为-8.43 mV,经过Dopamine和PNIPAAm修饰后的植物乳杆菌点位分别为1.791和13.767 mV;植物乳杆菌在0.1~100μg/mL黄曲霉毒素B_(1)吸附率为75.3%,p-ATRP和c-ATRP修饰的植物乳杆菌比未修饰的植物乳杆菌吸附能力分别提高了7.8%和6.4%。在相同黄曲霉毒素B_(1)浓度下,植物乳杆菌脱附率为6.1%,p-ATRP和c-ATRP修饰的植物乳杆菌脱附能力分别提高了14.4%和42%。经过修饰后的植物乳杆菌显著提升了植物乳杆菌对黄曲霉毒素的吸附和脱附能力。
