Rapid Surface Functionalization of Hydrogen-Terminated Silicon by Alkyl Silanols.
Rapid Surface Functionalization of Hydrogen-Terminated Silicon by Alkyl Silanols.
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DOI：
10.1021/jacs.7b01106
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发表时间：
2017-04-26
影响因子：
15
通讯作者：
Zuilhof H
中科院分区：
文献类型：
--
作者：
Escorihuela J;Zuilhof H
无机半导体衬底，特别是硅的表面功能化已经将注意力集中到许多技术上重要的应用，涉及光伏能源，生物传感和催化。对于这种改性工艺，高度需要无氧化物（H-封端）的硅表面，并且在过去几十年中已经描述了不同的化学方法。然而，它们的反应性通常很差，需要长的反应时间（2-18小时）或使用紫外光（10-30分钟）。在这里，我们报告了一个简单而快速的表面功能化的H-终止的Si（111）表面使用烷基硅烷醇。这种无催化剂的表面反应速度很快（室温下15分钟），并且可以通过紫外光照射加速，将反应时间缩短至1-2分钟。这种接枝过程可以形成致密的有机单层，具有水解稳定性（在pH 3或11条件下甚至长达30天），并且可以对一系列有机聚合物显示出优异的抗氧化性能。
Surface functionalization of inorganic semiconductor substrates, particularly silicon, has focused attention toward many technologically important applications, involving photovoltaic energy, biosensing and catalysis. For such modification processes, oxide-free (H-terminated) silicon surfaces are highly required, and different chemical approaches have been described in the past decades. However, their reactivity is often poor, requiring long reaction times (2–18 h) or the use of UV light (10–30 min). Here, we report a simple and rapid surface functionalization for H-terminated Si(111) surfaces using alkyl silanols. This catalyst-free surface reaction is fast (15 min at room temperature) and can be accelerated with UV light irradiation, reducing the reaction time to 1–2 min. This grafting procedure leads to densely packed organic monolayers that are hydrolytically stable (even up to 30 days at pH 3 or 11) and can display excellent antifouling behavior against a range of organic polymers.