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首页> 外文期刊>Crystal growth & design >In Situ Growth and Interlayer Modulation of Layered Double Hydroxide Thin Films from a Transparent Conducting Oxide Precursor
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In Situ Growth and Interlayer Modulation of Layered Double Hydroxide Thin Films from a Transparent Conducting Oxide Precursor

机译：从透明导电前体的分层双氢氧化物薄膜的原位生长和层间调节

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摘要

Layered double hydroxides (LDHs) are a class of cationic-layered solids that can be synthetically designed for a variety of advanced functions. Facile thin film growth of LDHs is an important requisite for a variety of applications including functional coatings, displays, and sensing. In this work we demonstrate, for the first time, an in situ and patternable thin film synthesis of interconnected Zn–Cr LDH particles from a transparent conducting oxide precursor, aluminum-doped zinc oxide, at room temperature within minutes. Synthetic parameters such as chromium(III) nitrate concentration, solvent composition, and reaction time were found to significantly affect the thickness and morphology of the resulting LDH films. These LDH thin films can undergo interlayer anion exchange, which modulates the interlayer distance of the LDH sheets and surface energy of the thin film. Replacement of the interlayer anion with perfluorooctanoate increases the interlayer sheet distance from 0.9 to 2.8 nm and induces a super-hydrophobic thin film that is capable of adsolubilizing and retaining organic guest molecules. The synthetic method and structural analysis of the LDH thin films introduced in this work opens new avenues of application for LDH films.
机译：层状双氢氧化物（LDHs）是一类阳离子层状固体，可综合设计用于多种高级功能。LDHs的简易薄膜生长是多种应用的重要必要条件，包括功能涂层、显示器和传感。在这项工作中，我们首次展示了在室温下几分钟内，从透明导电氧化物前驱体掺铝氧化锌中，原位合成互连Zn–Cr LDH颗粒的可图案化薄膜。研究发现，硝酸铬（III）浓度、溶剂组成和反应时间等合成参数对所得LDH膜的厚度和形貌有显著影响。这些LDH薄膜可以进行层间阴离子交换，从而调节LDH片的层间距离和薄膜的表面能。用全氟辛酸盐取代层间阴离子将层间片间距从0.9 nm增加到2.8 nm，并诱导形成能够溶解和保留有机客体分子的超疏水薄膜。本文介绍的LDH薄膜的合成方法和结构分析为LDH薄膜的应用开辟了新的途径。

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