期刊
NANO LETTERS
卷 15, 期 6, 页码 4114-4120出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01225
关键词
tip-enhanced Raman spectroscopy (TERS); tip-enhanced fluorescence (TEF); ultrahigh vacuum scanning tunneling microscopy (UHV-STM); time-dependent density functional theory (TDDFT)
类别
资金
- Department of Energy Office of Basic Energy Sciences (SISGR) [DE-FG02-09ER16109]
- National Science Foundation Center for Chemical Innovation on Chemistry at the Space-Time Limit [CHE-1414466]
- National Science Foundation Materials Research Science and Engineering Center [DMR-1121262]
- National Science Foundation Graduate Research Fellowship [DGE-1324585]
- Research Computing and Cyberinfrastructure, a unit of Information Technology Services at Penn State
- Direct For Mathematical & Physical Scien [1414466] Funding Source: National Science Foundation
- Division Of Chemistry [1414466] Funding Source: National Science Foundation
Tip-enhanced Raman scattering (TERS) and optically excited tip-enhanced fluorescence (TEF) of a self-assembled porphyrin monolayer on Ag(111) are studied using an ultrahigh vacuum scanning tunneling microscope (UHV-STM). Through selectively exciting different Q-bands of meso-tetrakis- (3,5-ditertiarybutylphenyl)-porphyrin (H2TBPP), chemical information regarding different vibronic excited states is revealed by a combination of theory and experiment; namely, TERS and time-dependent density functional theory (TDDFT) simulations. The observed TEF spectra suggest a weak coupling of H2TBPP to the substrate due to the bulky t-butyl groups and a possible alternative excited state decay path. This work demonstrates the potential of combining TERS and TEF for studying surface-mounted porphyins on substrates, thus providing insight into porphyrin-sensitized solar cells and catalysis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据