Plasmon-enhanced molecular fluorescence from an organic film in a tunnel junction
Plasmon-enhanced molecular fluorescence from an organic film in a tunnel junction
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DOI：
10.1063/1.2171795
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发表时间：
2006-02-06
影响因子：
4
通讯作者：
Nishitani, R
中科院分区：
文献类型：
--
作者：
Liu, HW;Le, Y;Nishitani, R
在空气中研究了H2 TBP卟啉（H2 TBPP）薄膜在Au（111）、Ag、高取向热解石墨（HOPG）和氧化铟锡（ITO）表面上的扫描隧道显微镜（STM）激发的分子荧光。从Au和Ag上的H2 TBPP膜观察到分子荧光，但从HOPG和ITO上的膜观察到分子荧光非常弱或不可检测。H_2TBPP/Ag的最大分子荧光强度比H_2TBPP/HOPG强100倍以上。强烈增强的衬底表面等离子体激元的分子激发，建议STM激发的分子荧光从H2 TBPP只在贵金属衬底上。(c)2006年，美国物理学会。
Scanning tunneling microscope (STM)-excited molecular fluorescence from H2TBP porphyrin (H2TBPP) thin films on Au (111), Ag, highly oriented pyrolytic graphite (HOPG), and indium tin oxide (ITO) surfaces has been investigated in air. Molecular fluorescence was observed from the H2TBPP films on Au and Ag, but it was extremely weak or undetectable from films on HOPG and ITO. The maximum intensity of molecular fluorescence from H2TBPP/Ag is at least 100 times stronger than that from H2TBPP/HOPG. Strong enhancement of molecular excitation by substrate surface plasmons is suggested for the STM-excited molecular fluorescence from H2TBPP only on the noble metal substrates. (c) 2006 American Institute of Physics.