Atif Ghafoor, Ben Yang, Yun-jie Yu, Yu-fan Zhang, Xian-biao Zhang, Gong Chen, Yao Zhang, Yang Zhang, Zhen-chao Dong. Site-Dependent TERS Study of a Porphyrin Molecule on Ag(100) at 7 K[J]. Chinese Journal of Chemical Physics , 2019, 32(3): 287-291. doi: 10.1063/1674-0068/cjcp1812280
Citation: Atif Ghafoor, Ben Yang, Yun-jie Yu, Yu-fan Zhang, Xian-biao Zhang, Gong Chen, Yao Zhang, Yang Zhang, Zhen-chao Dong. Site-Dependent TERS Study of a Porphyrin Molecule on Ag(100) at 7 K[J]. Chinese Journal of Chemical Physics , 2019, 32(3): 287-291. doi: 10.1063/1674-0068/cjcp1812280

Site-Dependent TERS Study of a Porphyrin Molecule on Ag(100) at 7 K

doi: 10.1063/1674-0068/cjcp1812280
Funds:  This work was supported by the National Key R&D Program of China (No.2016YFA0200600), the National Natural Science Foundation of China, the Chinese Academy of Sciences, and Anhui Initiative in Quantum Information Technologies. Atif Ghafoor acknowledges support by the China Scholarship Council.
  • Received Date: 2018-12-14
  • Single-molecule tip-enhanced Raman spectroscopy (TERS) has emerged as an important technique for structural analysis at sub-molecular scale. Here in this work, we report aTERS study of an isolated free-base porphyrin molecule adsorbed on the Ag(100) surface at cryogenic temperature (∽7 K). Site-dependent TERS spectra reveal distinct local vibrational information for the chemical constituents within a single molecule. Moreover, distinct spatial features among di erent Raman peaks can be resolved from the TERS mapping images. These images are found to associate with related vibrational modes, enabling to resolve the mode associated with N-H bonds at the sub-nanometer level. This study will provide deep insights into the symmetry of adsorption con gurations and local vibrational information within a single molecule.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Site-Dependent TERS Study of a Porphyrin Molecule on Ag(100) at 7 K

doi: 10.1063/1674-0068/cjcp1812280
Funds:  This work was supported by the National Key R&D Program of China (No.2016YFA0200600), the National Natural Science Foundation of China, the Chinese Academy of Sciences, and Anhui Initiative in Quantum Information Technologies. Atif Ghafoor acknowledges support by the China Scholarship Council.

Abstract: Single-molecule tip-enhanced Raman spectroscopy (TERS) has emerged as an important technique for structural analysis at sub-molecular scale. Here in this work, we report aTERS study of an isolated free-base porphyrin molecule adsorbed on the Ag(100) surface at cryogenic temperature (∽7 K). Site-dependent TERS spectra reveal distinct local vibrational information for the chemical constituents within a single molecule. Moreover, distinct spatial features among di erent Raman peaks can be resolved from the TERS mapping images. These images are found to associate with related vibrational modes, enabling to resolve the mode associated with N-H bonds at the sub-nanometer level. This study will provide deep insights into the symmetry of adsorption con gurations and local vibrational information within a single molecule.

Atif Ghafoor, Ben Yang, Yun-jie Yu, Yu-fan Zhang, Xian-biao Zhang, Gong Chen, Yao Zhang, Yang Zhang, Zhen-chao Dong. Site-Dependent TERS Study of a Porphyrin Molecule on Ag(100) at 7 K[J]. Chinese Journal of Chemical Physics , 2019, 32(3): 287-291. doi: 10.1063/1674-0068/cjcp1812280
Citation: Atif Ghafoor, Ben Yang, Yun-jie Yu, Yu-fan Zhang, Xian-biao Zhang, Gong Chen, Yao Zhang, Yang Zhang, Zhen-chao Dong. Site-Dependent TERS Study of a Porphyrin Molecule on Ag(100) at 7 K[J]. Chinese Journal of Chemical Physics , 2019, 32(3): 287-291. doi: 10.1063/1674-0068/cjcp1812280

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