• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Proceedings vol.2005-04; Electrochemical Society(ECS) Meeting and 42nd State-of-the-Art-Program on Compound Semiconductors(SOTAPOCS XLII) and the International Symposium on Processes at the Compound-Semiconductor/Solution Interface; 20050515-20; Quebec C >PREPARATION OF CLEAN ACID-TERMINATED MONOLAYERS ON SILICON (111) SURFACES
【24h】

PREPARATION OF CLEAN ACID-TERMINATED MONOLAYERS ON SILICON (111) SURFACES

机译：在硅（111）表面上制备干净的酸封端的单分子膜

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Acid-terminated (111) silicon surfaces have been prepared by molecular grafting of ω-functionalized alkenes on atomically flat hydrogenated surface and using two procedures: thermal hydrosilylation in ethyl ω-alkenoates, followed by hydrolysis, and direct photochemical hydrosilylation in ω-alkenoic acids. In each case the chemical state of the surface was followed by FTIR spectroscopy in an extended spectral range and the surface cleanliness was assessed with Atomic Force Microscopy. It was found that organic contaminants may strongly physisorb on acid terminated surface, and are removed only by treatments with appropriate solvents. Clean ester-terminated surfaces can be fully converted into acid-terminated surfaces by hydrolysis in mild conditions. One-step photochemical modification in ω-alkenoic acids leads to surfaces free of Si-O bonds, which demonstrates the absence of Si oxidation and proves that the grafting occurs via a hydrosilylation process. The reaction kinetics appear faster for the acid than for the corresponding alkenes.
机译：酸封端的（111）硅表面是通过将ω-官能化的烯烃分子接枝到原子平坦的氢化表面上并使用两种方法制备的：在ω-链烯酸乙酯中进行热氢化硅烷化，然后水解，以及在ω-链烯酸中进行直接光化学氢化硅烷化。在每种情况下，均通过扩展光谱范围的FTIR光谱跟踪表面的化学状态，并通过原子力显微镜评估表面清洁度。已经发现，有机污染物可以强烈地物理吸附在酸封端的表面上，并且仅通过用适当的溶剂处理才能去除。干净的酯封端表面可以在温和条件下水解，完全转变为酸封端表面。 ω-链烯酸中的一步光化学修饰导致表面没有Si-O键，这表明没有Si氧化，并证明了通过氢化硅烷化过程进行了接枝。酸的反应动力学比相应的烯烃快。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号