美国科学促进会
期刊
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图书
作者:Jianchun Xu , Ke Bi , Ru Zhang ...
来源:[J].Research, 2019, Vol.2019AAAS
摘要:Electromagnetic waves carrying an orbital angular momentum (OAM) are of great interest. However, most OAM antennas present disadvantages such as a complicated structure, low efficiency, and large divergence angle, which prevents their practical applications. So far, there are few...
作者:Yanghua Lu , Sirui Feng , Runjiang Shen ...
来源:[J].Research, 2019, Vol.2019AAAS
摘要:Static heterojunction-based electronic devices have been widely applied because carrier dynamic processes between semiconductors can be designed through band gap engineering. Herein, we demonstrate a tunable direct-current generator based on the dynamic heterojunction, whose mech...
作者:Shikui Han , Kai Zhou , Yifu Yu ...
来源:[J].Research, 2019, Vol.2019AAAS
摘要:The layered transition metal dichalcogenides (TMDs) and transition metal phosphides are low-cost, earth-abundant, and robust electrocatalysts for hydrogen evolution reaction (HER). Integrating them into hybrid nanostructures is potentially promising to further boost the catalytic...
作者:Xiangyu Gao , Zhanmiao Li , Jingen Wu ...
来源:[J].Research, 2019, Vol.2019AAAS
摘要:Fast actuation with nanoprecision over a large range has been a challenge in advanced intelligent manufacturing like lithography mask aligner. Traditional stacked stage method works effectively only in a local, limited range, and vibration coupling is also challenging. Here,...
作者:Qian He , Xiong Xiong Liu , Rui Wu ...
来源:[J].Research, 2019, Vol.2019AAAS
摘要:Highly conductive and stable electrode materials are usually the focus of high-performance supercapacitors. In this work, a unique design of Ni2P@carbon self-supported composite nanowires directly grown on Ni foam was applied for a supercapacitor. The Co3...
作者:He Gao , Xinsheng Fang , Zhongming Gu ...
来源:[J].Research, 2019, Vol.2019AAAS
摘要:We demonstrate a conformally mapped multifunctional acoustic metamaterial Mikaelian lens. Mikaelian lens is a gradient medium with a hyperbolic secant refractive index profile that can realize functions like beam self-focusing. Unlike the conventional design approaches, with a co...
作者:Sampa Ghosh , Joydip Mukhopadhyay , Abhijit Chakraborty
来源:[J].Research, 2019, Vol.2019AAAS
摘要:The clay mineral assemblages and geochemical compositions of the Permian Talchir and Barakar mudstones of the Raniganj basin, India, have been used to interpret terrestrial paleoclimate. The Talchir Formation presents unequivocal evidences of the Permian global glacial climate, a...
作者:Shuiyuan Wang , Xiang Hou , Lan Liu ...
来源:[J].Research, 2019, Vol.2019AAAS
摘要:The von Neumann bottleneck has spawned the rapid expansion of neuromorphic engineering and brain-like networks. Synapses serve as bridges for information transmission and connection in the biological nervous system. The direct implementation of neural networks may depend on novel...
作者:Kirthika Senthil Kumar , Po-Yen Chen , Hongliang Ren
来源:[J].Research, 2019, Vol.2019AAAS
摘要:Flexible and stretchable tactile sensors that are printable, nonplanar, and dynamically morphing are emerging to enable proprioceptive interactions with the unstructured surrounding environment. Owing to its varied range of applications in the field of wearable electronics, soft ...
作者:Zhaolin Na , Ruifang Yao , Qing Yan ...
来源:[J].Research, 2019, Vol.2019AAAS
摘要:Carbon nanotubes (CNTs) possess remarkable mechanical, electrical, thermal, and optical properties that predestine them for numerous potential applications. The conventional chemical vapor deposition (CVD) route for the production of CNTs, however, suffers from costly and complex...

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