title: Topography-specific isotropic tunneling in nanoparticle monolayer with sub-nm scale crevices.
abstract: Material used in flexible devices may experience anisotropic strain with identical magnitude, outputting coherent signals that tend to have a serious impact on device reliability. In this work, the surface topography of the nanoparticles (NPs) is proposed to be a parameter to control the performance of strain gauge based on tunneling behavior. In contrast to anisotropic tunneling in a monolayer of spherical NPs, electron tunneling in a monolayer of urchin-like NPs actually exhibits a nearly isotropic response to strain with different loading orientations. Isotropic tunneling of the urchin-like NPs is caused by the interlocked pikes of these urchin-like NPs in a random manner during external mechanical stimulus. Topography-dependent isotropic tunneling in two dimensions reported here opens a new opportunity to create highly reliable electronics with superior performance.
authors: School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China.
authors: Guisheng
authors: G
authors: Wang
authors: Weihong
authors: W
authors: Jiao
authors: Lizhi
authors: L
authors: Yi
authors: Yuejiao
authors: Y
authors: Zhang
authors: Ke
authors: K
authors: Wu
authors: Chao
authors: C
authors: Zhang
authors: Xianglong
authors: X
authors: Lv
authors: Lihua
authors: L
authors: Qian
authors: Jianfeng
authors: J
authors: Li
authors: Songliu
authors: S
authors: Yuan
authors: Liang
authors: L
authors: Chen