Ionic migration induced loss analysis of perovskite solar cells: a poling study (vol 24, pg 7805, 2022)

Fri, 19 Jul 2024 09:31:51 GMT

题名: Ionic migration induced loss analysis of perovskite solar cells: a poling study (vol 24, pg 7805, 2022) 作者: Zheng, Xue; Ming, Wenjie; Liu, Pingping; Zhang, Jie; Zhou, Hongfei; Chen, Ming; Li, Weimin; Huang, Boyuan; Wang, Huan; Yang, Chunlei 摘要: Correction for 'Ionic migration induced loss analysis of perovskite solar cells: a poling study' by Xue Zheng et al., Phys. Chem. Chem. Phys., 2022, 24, 7805-7814, https://doi.org/10.1039/D1CP05450C.

Gas-balancing adsorption strategy towards noble-metal-based nanowire electrocatalysts (Jun, 10.1038/s41929-024-01167-8, 2024)

Fri, 19 Jul 2024 09:31:09 GMT

题名: Gas-balancing adsorption strategy towards noble-metal-based nanowire electrocatalysts (Jun, 10.1038/s41929-024-01167-8, 2024) 作者: Liang, Jiashun; Li, Shenzhou; Liu, Xuan; Wan, Yangyang; Xia, Yu; Shi, Hao; Zhang, Siyang; Wang, Hsing-Lin; Lu, Gang; Wu, Gang; Huang, Yunhui; Li, Qing

Sub-10 Î¼m-Thick Ge Thin Film Fabrication from Bulk-Ge Substrates via a Wet Etching Method

Fri, 19 Jul 2024 09:05:55 GMT

题名: Sub-10 Î¼m-Thick Ge Thin Film Fabrication from Bulk-Ge Substrates via a Wet Etching Method 作者: Wang, Liming; Zhu, Ying; Wen, Rui-Tao; Xia, Guangrui 摘要: Low-defect density Ge thin films are crucial for studying the impact of defect density on the performance limits of Ge-based optical devices (optical detectors, LEDs, and lasers). Ge thinning is also important for Ge-based multijunction solar cells. In this work, Ge wet etching using three acidic H2O2 solutions (HF, HCl, and H2SO4) was studied in terms of etching rate, surface morphology, and surface roughness. HCl-H2O2-H2O (1:1:5) was demonstrated to wet-etch 535 mu m-thick bulk-Ge substrates to 4.1 mu m with a corresponding RMS surface roughness of 10 nm, which was the thinnest Ge film from bulk-Ge via a wet etching method to the best of our knowledge. The good quality of pre-etched bulk-Ge was preserved, and the low threading dislocation density of 6000-7000 cm(-2) was maintained after the etching process. This approach provides an inexpensive and convenient way for accurate Ge substrate thinning in applications such as multijunction solar cells and sub-10 mu m-thick Ge thin film preparation, which enables future studies of low-defect density Ge-based devices such as photodetectors, LEDs, and lasers.

Nanoemulsions Stable against Ostwald Ripening

Fri, 19 Jul 2024 08:57:27 GMT

题名: Nanoemulsions Stable against Ostwald Ripening 作者: Guo, Yanlin; Zhang, Xinpeng; Wang, Xiaohan; Zhang, Li; Xu, Zhenghe; Sun, Dejun 摘要: Ostwald ripening, the dominant mechanism of droplet size growth for an O/W nanoemulsion at high surfactant concentrations, depends on micelles in the water phase and high aqueous solubility of oil, especially for spontaneously formed nanoemulsions. In our study, O/W nanoemulsions were formed spontaneously by mixing a water phase with an oil phase containing fatty alcohol polyoxypropylene polyoxyethylene ether (APE). By monitoring periodically the droplet size of the nanoemulsions via dynamic light scattering, we demonstrated that the formed O/W nanoemulsions are stable against Ostwald ripening, i.e., droplet growth. In contrast, the nanoemulsion droplets grew with the addition of micelles, demonstrating the pivotal role of the presence of micelles in the water phase in the occurrence of Ostwald ripening. The influence of the initial phase of APE, the oil or water phase in which APE is present, on the micelle formation is discussed by the partition coefficient and interfacial adsorption of APE between the oil and water phase using a surface and interfacial tensiometer. In addition, the spontaneously formed O/W nanoemulsion, which is stable against Ostwald ripening, can be used as a nanocarrier for the delivery of water-insoluble pesticides. These results provide a novel approach for the preparation of stable nanoemulsions and contribute to elucidating the mechanism of instability of nanoemulsions.

The Highly Operational Team (HOT) toward f-Block Materials

Fri, 19 Jul 2024 08:52:07 GMT

题名: The Highly Operational Team (HOT) toward f-Block Materials 作者: Park, Kyoung Chul; Kittikhunnatham, Preecha; Lim, Jaewoong; Thaggard, Grace C.; Liu, Yuan; Martin, Corey R.; Leith, Gabrielle A.; Toler, Donald J.; Ta, An T.; Birkner, Nancy; Lehman-Andino, Ingrid; Hernandez-Jimenez, Alejandra; Morrison, Gregory; Amoroso, Jake W.; zur Loye, Hans-Conrad; DiPrete, Dave P.; Smith, Mark D.; Brinkman, Kyle S.; Phillpot, Simon R.; Shustova, Natalia B.; Liu, Peiren; Fang, Fang; Wang, Haochen; Khashab, Niveen M.; Wu, Zhu; Choi, Heekyoung; Hudson, Zachary M.; Goerlich, Tim; Coburger, Peter; Yang, Eric S.; Goicoechea, Jose M.; Gruetzmacher, Hansjorg; Mueller, Christian; Ivanova, Mariya E.; Peters, Ralf; Muller, Martin; Haas, Stefan; Seidler, Martin Florian; Mutschke, Gerd; Eckert, Kerstin; Rose, Philipp; Calnan, Sonya; Bagacki, Rory; Schlatmann, Rutger; Grosselindemann, Cedric; Schafer, Laura-Alena; Menzler, Norbert H.; Weber, Andre; van de Krol, Roel; Liang, Feng; Abdi, Fatwa F.; Brendelberger, Stefan; Neumann, Nicole; Grobbel, Johannes; Roeb, Martin; Sattler, Christian; Duran, Ines; Dietrich, Benjamin; Hofberger, M. E. Christoph; Stoppel, Leonid; Uhlenbruck, Neele; Wetzel, Thomas; Rauner, David; Hecimovic, Ante; Fantz, Ursel; Kulyk, Nadiia; Harting, Jens; Guillon, Olivier; Hu, Qiyu; Chen, Shoushun; Wagberg, Thomas; Zhou, Hongshan; Li, Shujun; Li, Yiding; Tan, Yilan; Hu, Wenqi; Ding, Yong; Han, Xinbao; Behren, Sandra; Yu, Jin; Pett, Christian; Schorlemer, Manuel; Heine, Viktoria; Fischoeder, Thomas; Elling, Lothar; Westerlind, Ulrika; Moorthy, Suresh; Lambert, Hugues; Mohan, Neetha; Schwarzlose, Thomas; Nau, Werner M.; Kalenius, Elina; Lee, Tung-Chun; Cha, Jin Wook; Kim, Min-Seon; Park, Jin-Soo; Hou, Pengfei; Tian, Yumiao; Xie, Yu; Du, Fei; Chen, Gang; Vojvodic, Aleksandra; Wu, Jianzhong; Meng, Xing; Liu, Chengyuan; Qian, Bing; Xiao, Tianci; Lv, Chunchun; Luo, Jinsong; Bao, Jun; Pan, Yang; Pakulski, Dawid; Gorczynski, Adam; Brykczynska, Daria; Montes-Garcia, Veronica; Czepa, Wlodzimierz; Janica, Iwona; Bielejewski, Michal; Kubicki, Maciej; Patroniak, Violetta; Samori, Paolo; Ciesielski, Artur; Zhao, Wengao; Wang, Kuan; Fan, Xinming; Ren, Fucheng; Xu, Xieyu; Liu, Yangyang; Xiong, Shizhao; Liu, Xiangsi; Zhang, Zhengfeng; Si, Mayan; Zhang, Ruizhuo; van den Bergh, Wessel; Yan, Pengfei; Battaglia, Corsin; Brezesinski, Torsten; Yang, Yong; Luo, Zhenli; Li, Zhewei; Zhao, Haoqiang; Yang, Ji; Xu, Lijin; Lei, Ming; Fan, Qinghua; Walsh, Patrick J.; Bartolomei, Beatrice; Corti, Vasco; Prato, Maurizio; Chen, Shiyan; Feng, Lingwei; Peng, Lixia; Gao, Xiang; Zhu, Yongfa; Yang, Liulin; Chen, Dafa; Zhang, Kai; Guo, Xugang; Huang, Fei; Xia, Haiping; Lux, Daniel M.; Aryal, Vivek; Niroula, Doleshwar; Giri, Ramesh; Ma, Junjie; Wang, Zixiao; Jiang, Bo; Wang, Wei; Wang, Hui; Panda, Shibaram; Ghorai, Prasanta; Tan, Chang-Yin; Kim, Minseok; Hong, Sungwoo; Zhang, Hao; Bolshakov, Aleksei; Meena, Raghavendra; Garcia, Gustavo A.; Dugulan, A. Iulian; Parastaev, Alexander; Li, Guanna; Hensen, Emiel J. M.; Kosinov, Nikolay; Huang, Feng; Fan, Xiao-Chun; Cheng, Ying-Chun; Wu, Hao; Xiong, Xin; Yu, Jia; Wang, Kai; Zhang, Xiao-Hong; Zhan, Wenjun; Xu, Lingling; Liu, Zhiyu; Liu, Xiaoyang; Gao, Ge; Xia, Tiantian; Cheng, Xiaotong; Sun, Xianbao; Wu, Fu-Gen; Yu, Qian; Liang, Gaolin; Li, Linfei; Schultz, Jeremy F.; Mahapatra, Sayantan; Liu, Xiaolong; Zhang, Xu; Hersam, Mark C.; Jiang, Nan; Fan, Qianqian; Si, Yubing; Zhu, Fulong; Guo, Wei; Fu, Yongzhu; Ohtani, Ryo; Xu, Jianeng; Yanagisawa, Junichi; Iwai, Yuudai; Ehara, Takumi; Miyata, Kiyoshi; Onda, Ken; Pirillo, Jenny; Hijikata, Yuh; Hiraoka, Tomoaki; Hayami, Shinya; Le Ouay, Benjamin; Ohba, Masaaki; Mubarok, Hanif; Amin, Al; Lee, Taehwan; Jung, Jaehoon; Lee, Jeong-Hwan; Lee, Min Hyung; Liu, Yujia; Yuan, Liuzhong; Guo, Jiaxiang; Sun, Wenting; Wang, Yue; Dou, Chuandong; Xu, Jing; Zhang, Qiang; Gao, Xin; Wang, Peifang; Che, Huinan; Tang, Chunmei; Ao, Yanhui; Guan, Qianwen; Zhu, Tingting; Zhu, Zeng-Kui; Ye, Huang; You, Shihai; Xu, Peng; Wu, Jianbo; Niu, Xinyi; Zhang, Chengshu; Liu, Xitao; Luo, Junhua; Jose Tarrio, Juan; Rodriguez, Rafael; Crassous, Jeanne; Quinoa, Emilio; Freire, Felix; Wang, Kaixuan; Yang, Longqing; Li, Yi; Li, Hongye; Liu, Zhili; Ning, Lichao; Liu, Xiaohua; Feng, Xiaoming; Yu, Jie; He, Shasha; Zhang, Chi; Xu, Cheng; Huang, Jingsheng; Xu, Mengke; Pu, Kanyi; Ge, Jian-Fei; Zou, Xi-Zhang; Liu, Xin-Ru; Ji, Chong-Lei; Zhu, Xin-Yuan; Gao, De-Wei; Meng, Xin-Yu; Li, Jin-Jin; Liu, Peng; Duan, Mingyu; Wang, Jing; Zhou, Yin-Ning; Xie, Yongbing; Luo, Zheng-Hong; Pan, Yun-Xiang; Cao, Yun-Dong; Yin, Di; Li, Si; Dong, Xi-Yan; Feng, Y.; Liu, Hong; Fan, Lin-Lin; Gao, Guang-Gang; Zang, Shuang-Quan; Yu, Le; Abedi, Syed Ali Abbas; Lee, Jeongjin; Xu, Yunjie; Son, Subin; Chi, Weijie; Li, Mingle; Liu, Xiaogang; Park, Jae Hyung; Kim, Jong Seung; Kobayashi, Toi; Kumagai, Naoya; Yan, Rui; Mishra, Bikash; Traxler, Michael; Roeser, Jerome; Chaoui, Nicolas; Kumbhakar, Bidhan; Schmidt, Johannes; Li, Shuang; Thomas, Arne; Pachfule, Pradip; Zhao, Chuan; Yan, Zhongfu; Zhou, Bo; Pan, Yu; Hu, Anjun; He, Miao; Liu, Jing; Long, Jianping; Zhang, Bo; Xu, Jun; Li, Chang-Tai; Huang, Hong-Liang; Chen, Ming-Xing; Yu, Mei-Hui; Chang, Ze; Bu, Xian-He; Berrocal, David A. Perez; Vishwanatha, Thimmalapura M.; Horn-Ghetko, Daniel; Botsch, J. Josephine; Hehl, Laura A.; Kostrhon, Sebastian; Misra, Mohit; Dikic, Ivan; Geurink, Paul P.; van Dam, Hans; Schulman, Brenda A.; Mulder, Monique P. C.; Si, Xu-Ge; Feng, Shi-Xiong; Wang, Zhuo-Yan; Chen, Xiaoyu; Xu, Meng-Meng; Zhang, Yu-Zhen; He, Jun-Xiong; Yang, Limin; Cai, Quan; Liu, Haipei; Liu, Zhaowei; Santos, Mariana Sa; Nash, Michael A.; Eaby, Alan C.; Loots, Leigh; Basson, Jeanice L.; Esterhuysen, Catharine; Barbour, Leonard J.; Wakpal, Joseph; Pathiranage, Vishaka; Walker, Alice R.; Nguyen, Hien M.; Zhao, Huisi; Zhao, Chuanqi; Liu, Zhengwei; Yi, Jiadai; Liu, Xuemeng; Ren, Jinsong; Qu, Xiaogang; Basak, Yudhajeet; Jeoung, Jae-Hun; Domnik, Lilith; Dobbek, Holger; Geng, Shubo; Xu, Hang; Cao, Chun-Shuai; Pham, Tony; Zhao, Bin; Zhang, Zhenjie; Hou, Li-Peng; Li, Yuan; Li, Zheng; Zhang, Qian-Kui; Li, Bo-Quan; Bi, Chen-Xi; Chen, Zi-Xian; Su, Li-Ling; Huang, Jia-Qi; Wen, Rui; Zhang, Xue-Qiang; Li, Fengqin; Li, Junru; Yang, Weiqiang; Yang, Shuai; Chen, Congshuo; Du, Ling; Mei, Junyang; Tang, Qianyun; Chen, Xiaojing; Yao, Chi; Yang, Dayong; Zuo, Xiaolei; Liu, Peifeng; Zheng, Wei; Li, XuPing; Baryshnikov, Glib V.; Shan, Xueru; Siddique, Farhan; Qian, Cheng; Zhao, Shengyin; Wu, Hongwei; Schulz, Annika; Kalkuhl, Till L.; Keil, Philip M.; Hadlington, Terrance J.; Tan, Zheng; Chen, Long; Li, Lingyu; Li, Yuzhen; Luo, Yao; Wang, Fei; Dong, Shunxi; Wang, Yunzheng; Han, Jinfeng; Chen, Mengyang; Lv, Wenting; Meng, Pengtong; Gao, Wei; Meng, Xiangju; Fan, Weibin; Yan, Wenfu; Yu, Jihong; Zhang, Yanjie; Zhang, Lu; Wang, Wenjie; Deng, Qingqing; Liu, Mengmeng; Zhu, Zitong; Liu, Hao; Song, Yurou; Ren, Yanhan; Cheng, Huijie; Jiao, Yuye; Shi, Shaobo; Gao, Lihua; Xie, Huimin; Gao, Junfeng; Sun, Licheng; Hou, Jungang; Naveen, Kenkera Rayappa; Oh, Jun Hyeog; Lee, Hyun Seung; Kwon, Jang Hyuk; Liu, Qingxue; Shen, Feiran; Song, Guohui; Liu, Tianfu; Feng, Weicheng; Li, Rongtan; Zhang, Xiaomin; Li, Mingrun; He, Lunhua; Zheng, Xu; Yin, Shuaishuai; Yin, Guangzhi; Song, Yuefeng; Wang, Guoxiong; Bao, Xinhe; Li, Yilin; Yu, Yanyan; Lou, Yuhan; Zeng, Suqing; Sun, Yaxu; Liu, Yongzhuang; Yu, Haipeng; Tan, Boon Beng; Hu, Ming; Ge, Shaozhong; Gu, Binbin; Dickschat, Jeroen S.; Fuchs, Kathleen; Medina Rivero, Samara; Weidlich, Anna; Rominger, Frank; Israel, Noel; Popov, Alexey A.; Dreuw, Andreas; Freudenberg, Jan; Casado, Juan; Bunz, Uwe H. F.; Tay, Gavin; Wayama, Toshiaki; Takezawa, Hiroki; Yoshida, Satoshi; Sato, Sota; Fujita, Makoto; Oguri, Hiroki; Ji, Shuaiyu; Zhao, Lixing; Miao, Bingyang; Xue, Meng; Pan, Tao; Shao, Zhichao; Zhou, Xin; Fu, Aiping; Zhang, Yuexia; Wang, Chong; Tian, Chang-Yi; Zhao, Ya; Jiang, Shuai; Wang, Tiantong; Zheng, Huijun; Yan, Wenhui; Li, Gang; Xie, Hua; Li, Jun; Hu, Han-Shi; Yang, Xueming; Jiang, Ling; Kent, Greggory T.; Morgan, Emily; Albanese, Kaitlin R.; Kallistova, Anna; Brumberg, Alexandra; Kautzsch, Linus; Wu, Guang; Vishnoi, Pratap; Seshadri, Ram; Cheetham, Anthony K.; Wu, Shuo; Schiel, Florian; Melchiorre, Paolo; Zeng, Yaxin; Xia, Ying; Plangger, Immanuel; Pinkert, Tobias; Wurst, Klaus; Magauer, Thomas; Wang, Wang; Brown, M. Kevin; Ramirez, Nieves P.; Waser, Jerome; Genossar-Dan, Nadav; Atlas, Sharona; Fux, Dana; Lavan, Shani Har; Zamir, Uri; Rozenberg, Illya; Nguyen, Thanh Lam; Hemberger, Patrick; Baraban, Joshua H.; Yang, Yuhao; Miraghaee, Seyedesahar; Pace, Renee; Umemoto, Teruo; Hammond, Gerald B.; Yang, Xiuxiu; Kuziola, Jennifer; Beland, Vanessa A.; Busch, Julia; Leutzsch, Markus; Bures, Jordi; Cornella, Josep; Pang, Yue; Leutzsch, Markus; Nothling, Nils; Bauer, Kevin; Kazmaier, Uli

Revitalizing Traditional Phenolic Resin toward a Versatile Platform for Advanced Materials

Fri, 19 Jul 2024 08:33:29 GMT

题名: Revitalizing Traditional Phenolic Resin toward a Versatile Platform for Advanced Materials 作者: Yu, Zhi-Long; Gao, Yu-Cheng; Qin, Bing; Ma, Zhi-Yuan; Yu, Shu-Hong 摘要: Phenolic resin, the first synthetic plastic with a history of more than a century, is synthesized by polycondensation of phenols and aldehydes. Phenolic resin has been extensively explored and once used in every aspect of life such as civil equipment, construction materials, decorations, and military industry. Although the continuous surge of novel high-performance engineering plastics since the last century has accelerated the displacement of phenolic resin, it is still well-known for its admirable properties including mechanical robustness, electrical insulation, fire resistance, and chemical stability. Fortunately, booming nanotechnologies offer new opportunities to unearth the treasures buried deep beneath this centuries-old phenolic chemistry and have ushered phenolic resin into the age of nanomaterials. Leveraging the phenolic chemistry (high activity of phenols, strong eletrophilicity of phenolic hydroxyl groups, or reducing capacity of aldehydes) at the microscopic scale allows precise design and control of the nano/microstructures and compositions. In the past several decades, phenolic resin has entered its second rejuvenation and flourishment with the hallmark of a range of emerging functional nanomaterials. The merit of easy and controllable synthesis is brought into the fullest play to create a huge amount of unprecedented exquisite microstructures. The good thermal stability and high carbon yield also render wide use as protection for other vulnerable materials or as a carbon source. Engineering phenolic resin has produced a series of novel materials spanning from zero-dimensional (0D) nanomaterials to three-dimensional (3D) macroscopic assemblies with outstanding properties far beyond the capabilities of traditional phenolic bulk products. All these properties confer applications in energy, biomedical engineering, thermal insulation, fire resistance, environment, and many other aspects. The intentions of this Account therefore relate to three levels of content: (i) a call for more attention to this traditional phenolic chemistry and material which can bring us new surprises under the light of emerging technologies, (ii) a summary of the advances in novel phenolic materials in terms of synthesis, properties, and applications, and (iii) inspiring more explorations on phenolic chemistry toward the broader interdisciplinary applications. The Account begins with a brief introduction and basic properties of phenolic resin. It then describes the evolution of phenolic resins toward multiscale functional materials and applications. Novel phenolic materials can be categorized into low-dimensional (0D, 1D, 2D) nanomaterials and macroscopic 3D monoliths based on methods such as hydrothermal synthesis, self-assembly, and freeze-casting. Tuning the synthesis at multiscales leads to various sophisticated structures, such as core-shell nanospheres, nanocables, and wood-like cellular structures that are suitable for applications in energy, biomedical engineering, fire resistance, thermal insulation, and environment. At the end, the remaining challenges and promising directions are proposed from the viewpoints of green synthesis, large-scale fabrication, recycling, and biodegradation. It is expected that this Account would attract more attention to this traditional topic and provide a profound understanding of engineering functional phenolic materials, which finally are expected to provide inspiration for designing other polymeric nanomaterials and monoliths.

Ambient N₂ Reduction to NH₃ Electrocatalyzed by ZIF-67-Derived Nitrogen-Doped Porous Carbon Supported Co₉S₈ Nanomaterials

Fri, 19 Jul 2024 08:31:46 GMT

题名: Ambient N₂ Reduction to NH₃ Electrocatalyzed by ZIF-67-Derived Nitrogen-Doped Porous Carbon Supported Co₉S₈ Nanomaterials 作者: Zhang, Huanhuan; Yan, Shuhao; Yi, Wei; Ma, Xiao; He, Jing; Lu, Yebo; Yi, Lanhua; Wang, Xingzhu 摘要: The electrocatalytic nitrogen reduction reaction (eNRR) under ambient conditions is a promising alternative to the Haber-Bosch process, but one of the primary pending issues for the eNRR is the development of efficient and stable electrocatalysts. Herein, we propose to prepare a ZIF-67-derived nitrogen-doped porous carbon-supported Co9S8 nanocomposite achieving the maximum average of 9.80 mu g h(-1) mg(cat)(-1) NH3 yield and the highest Faradaic efficiency (FE) of 9.89% in 0.1 M Na2SO4. Moreover, Co9S8/NC shows excellent electrocatalytic stability and durability for the eNRR.

Wide-angle vertical coupling gratings enabled by nano-imprinted microlens array

Fri, 19 Jul 2024 06:42:38 GMT

题名: Wide-angle vertical coupling gratings enabled by nano-imprinted microlens array 作者: Gan Xiao; Xuanming Zhang; Fei Lou; Lei Lei; Xin Cheng 摘要: We experimentally show a vertical grating coupler featuring extended coupling angles through nano-imprinted lens array. This nanostructure exhibits a 2-3.4 dB increase in coupling efficiency within the ±15° angular range compared to the bare device.

Solution-Processable Route for Large-Area Uniform 2D Semiconductor Nanofilms

Fri, 19 Jul 2024 04:51:08 GMT

题名: Solution-Processable Route for Large-Area Uniform 2D Semiconductor Nanofilms 作者: Li, Wen-Hua; Li, Nan; Wang, Xiao-Li; Wang, Wenjuan; Zhang, Haobing; Xu, Qiang 摘要: ["The semiconductor thin film engineering technique plays a key role in the development of advanced electronics. Printing uniform nanofilms on freeform surfaces with high efficiency and low cost is significant for actual industrialization in electronics. Herein, a high-throughput colloidal printing (HTCP) strategy is reported for fabricating large-area and uniform semiconductor nanofilms on freeform surfaces. High-throughput and uniform printing rely on the balance of atomization and evaporation, as well as the introduced thermal Marangoni flows of colloidal dispersion, that suppresses outward capillary flows. Colloidal printing with in situ heating enables the fast fabrication of large-area semiconductor nanofilms on freeform surfaces, such as SiO2/Si, Al2O3, quartz glass, poly(ethylene terephthalate) (PET), Al foil, plastic tube, and Ni foam, expanding their technological applications where substrates are essential. The printed SnS2 nanofilms are integrated into thin-film semiconductor gas sensors with one of the fastest responses (8 s) while maintaining the highest sensitivity (Rg/Ra = 21) (toward 10 ppm NO2), as well as an ultralow limit of detection (LOD) of 46 ppt. The ability to print uniform semiconductor nanofilms on freeform surfaces with high-throughput promises the development of next-generation electronics with low cost and high efficiency.","A high-throughput colloidal printing strategy for fabricating large-area and uniform semiconductor nanofilms on freeform surfaces. Uniform deposition relies on the discovery of unprecedented enhanced thermal Marangoni flows of well-dispersed nanosheet colloid during the print-heating process that suppresses outward capillary flows. image"]

Flexible and Robust Core-Shell PANI/PVDF@PANI Nanofiber Membrane for High-Performance Electromagnetic Interference Shielding

Fri, 19 Jul 2024 04:50:11 GMT

题名: Flexible and Robust Core-Shell PANI/PVDF@PANI Nanofiber Membrane for High-Performance Electromagnetic Interference Shielding 作者: Chen, Mingyi; Li, Maochun; Gao, Yufei; He, Shao; Zhan, Jie; Zhang, Kai; Huo, Ying; Zhu, Jian; Zhou, Hongkang; Fan, Jie; Chen, Rouxi; Wang, Hsing-Lin 摘要: Developing high-performance electromagnetic interference (EMI) shielding materials that are lightweight and flexible and have excellent mechanical properties is an ideal choice for modern integrated electronic devices and microwave protection. Herein, we report the preparation of core-shell polyaniline (PANI)-based nanofiber membranes for EMI shielding through seed polymerization. Electrospinning a PANI solution leads to homogeneously dispersed PANI on the nanofiber surface, with abundant attachment sites for aniline through electrostatic adsorption and hydrogen bonding interaction, allowing PANI to grow on the nanofiber surfaces. This stable core-shell heterostructure provides more interfaces for reflecting and absorbing microwaves. The PANI/PVDF@PANI membranes achieved a shielding efficiency (SE) of 44.7 dB at a thickness of only 1.2 mm, exhibiting an exceptionally high specific EMI shielding effectiveness (SE/t) of 372.5 dB cm(-1). Furthermore, the composite membrane exhibits outstanding mechanical stability, durability, air permeability, and moisture permeability, also making it suitable for applications such as EM shielding clothing.