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纳米结构双偶极层内的键收缩及端态极化主导纳米材料所有的奇异特性

已有 1144 次阅读 2021-10-30 17:28 |个人分类:控键工程|系统分类:论文交流

The common and intrinsic skin electric-double-layer (EDL) and its bonding characteristics of nanostructures

https://www.sciencedirect.com/science/article/abs/pii/S0169433220329652


We show that nanocrystals share a common and intrinsic skin electric-double-layer (EDL). The EDL is determined to be 2.14 regular-bond-length thick using differential phonon spectroscopy that distills phonon abundance transiting from the core region to the EDL of the sized crystals. Theoretical reproduction of the size-resolved Raman shift for Si, CeO2, and SnO2 nanocrystals, elasticity of ZnO, and the XPS 2p energy shift, band gap expansion and melting point shift of Si crystals confirmed the universality of the EDL of which bonds are shorter and stronger than those inside the bulk or the particle core interior. The EDL bond contraction and the associated electron entrapment and polarization originate, and the EDL volume quantifies the size dependency of nanostructures while the electron entrapment or polarization entitles the undercoordinated single or edge atoms with properties that a bulk does never show.




https://blog.sciencenet.cn/blog-73032-1310142.html

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