...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Interfacial Charge-Transfer Effects in Semiconductor-Molecule-Metal Structures: Influence of Contact Variation
【24h】

Interfacial Charge-Transfer Effects in Semiconductor-Molecule-Metal Structures: Influence of Contact Variation

机译：半导体-分子-金属结构中的界面电荷转移效应：接触变化的影响

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

The charge-transfer resonance of Raman measurements in nanosized semiconductor-molecule-metal interfaces as a function of the excitation energy with four models (Cu-ZnO- PATP-Ag, Cu-Ag-PATP-ZnO, Cu-ZnO-Ag-PATP, and Cu-Ag-ZnO-PATP assemblies) to describe this dependence provides a powerful tool to study the chemical mechanism of surface enhanced Raman scattering (SERS). We measured the SERS spectra of self-assembled p-aminothiophenol (PATP) molecule junctions at 488, 514, 633, and 785 nm excitation wavelengths. We followed changes at the molecule junctions during the conditioning and eventually effect of charge-transfer (CT) through molecule-ZnO interfaces. Our results demonstrate that the interaction between the semiconductor bands and molecular energy levels can lead to novel charge behavior. The typical ZnO-PATP interfacial electron-hole recombination causes an increase in the CT resonance enhancement of Raman scattering, which is mainly responsible for the drastic change in molecular polarizability. We also proposed a complementary interpretation of the mechanism responsible for the highly variable enhancement observed in SERS.
机译：四种模型（Cu-ZnO-PATP-Ag，Cu-Ag-PATP-ZnO，Cu-ZnO-Ag-PATP）在纳米半导体分子-金属界面中拉曼测量的电荷转移共振与激发能的关系，以及描述这种依赖性的Cu-Ag-ZnO-PATP装配体）为研究表面增强拉曼散射（SERS）的化学机理提供了强大的工具。我们在488、514、633和785 nm激发波长下测量了自组装对氨基苯硫酚（PATP）分子连接的SERS光谱。我们在调节过程中跟踪了分子连接处的变化，并最终观察到了通过分子-ZnO界面进行电荷转移（CT）的作用。我们的结果表明，半导体能带和分子能级之间的相互作用可以导致新颖的电荷行为。典型的ZnO-PATP界面电子-空穴复合导致拉曼散射CT共振增强的增加，这主要是导致分子极化率的急剧变化。我们还提出了对引起SERS中高度可变增强的机制的补充解释。

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