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首页> 外文期刊>Chemistry: A European journal >Soft-Chemical Exfoliation Route to Layered Cobalt Oxide Monolayers andIts Application for Film Deposition and Nanoparticle Synthesis
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Soft-Chemical Exfoliation Route to Layered Cobalt Oxide Monolayers andIts Application for Film Deposition and Nanoparticle Synthesis

机译：层状氧化钴单层的软化学剥离途径及其在膜沉积和纳米颗粒合成中的应用

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摘要

A colloidal suspension of ex-foliated, layered cobalt oxide nano-sheets has been synthesized throughthe intercalation of quaternary tetra-methylammonium ions into protonatedlithium cobalt oxide. According toatomic force microscopy, exfoliatednanosheets of layered cobalt oxideshow a plateau-like height profile withnanometer-level height, underscoringthe formation of unilamellar 2D nano-sheets. The exfoliation of layered cobalt oxide was cross-confirmed by X-ray diffraction, UV/Vis spectroscopy,and transmission electron microscopy.The maintenance of the hexagonal in-plane structure of the cobalt oxide lat-tice after the exfoliation process wasevidenced by selected-area electron diffraction and Co K-edge X-ray ab-sorption near-edge structure analysis.The zeta-potential measurements clear-ly demonstrated the negative surfacecharge of cobalt oxide nanosheets.Adopting the nanosheets of layeredcobalt oxide as a precursor, we wereable to prepare the monodisperse CoOnanocrystals with a particle size of 10 nm as well as the heterolayeredfilm composed of cobalt oxide mono-layer and polycation.
机译：通过将季四甲基铵离子嵌入质子化锂钴氧化物中，合成了脱落的，分层的钴氧化物纳米片的胶体悬浮液。根据原子力显微镜，层状氧化钴的剥落纳米片显示出具有纳米级高度的高原样高度轮廓，强调了单层二维纳米片的形成。通过X射线衍射，UV / Vis光谱和透射电子显微镜对层状氧化钴的剥落进行交叉确认。剥落过程后，氧化钴晶格的六边形面内结构的维持通过选择-区域电子衍射和Co K边缘X射线吸收近边缘结构分析。ζ电位测量清楚地证明了氧化钴纳米片的负表面电荷。采用层状氧化钴纳米片作为前体，我们能够制备粒径为10 nm的单分散Coanoanocrystals以及由氧化钴单层和聚阳离子组成的杂层膜。

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