Influence of asymmetric adsorption on electronic states of molecule studied by scanning tunneling microscopy and spectroscopy

Yi Bao Li; Jun Hua Wan; Guicun Qi; Ke Deng; Yanlian Yang; Qingdao Zeng; Wei Huang; Chen Wang

doi:10.1016/j.cplett.2009.04.034

Influence of asymmetric adsorption on electronic states of molecule studied by scanning tunneling microscopy and spectroscopy

Yi Bao Li, Jun Hua Wan, Guicun Qi, Ke Deng, Yanlian Yang, Qingdao Zeng, Wei Huang, Chen Wang

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Abstract

The electronic states of unique molecule (Py-Per-Py), composed of two pyrene (Py1 and Py2) units, were investigated by using scanning tunneling microscopy and spectroscopy (STM/STS) at the liquid/solid interface. Bias-polarity-dependence of STM images of the Py1 and Per moieties were observed. STS results revealed that the apparent energy gaps for the Py1 and the Py2 were appreciably different due to possible asymmetric adsorption configurations. The apparent energy gap for the Per moiety measured by STS was in agreement with the hybrid density functional theory (DFT) simulations. In a parallel study, another molecule (Py-e-Per-e-Py) was also studied by using STM/STS for further confirmation of the proposed mechanism.

Original language	English
Pages (from-to)	132-136
Number of pages	5
Journal	Chemical Physics Letters
Volume	474
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2009.04.034
State	Published - 25 May 2009
Externally published	Yes

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10.1016/j.cplett.2009.04.034

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title = "Influence of asymmetric adsorption on electronic states of molecule studied by scanning tunneling microscopy and spectroscopy",

abstract = "The electronic states of unique molecule (Py-Per-Py), composed of two pyrene (Py1 and Py2) units, were investigated by using scanning tunneling microscopy and spectroscopy (STM/STS) at the liquid/solid interface. Bias-polarity-dependence of STM images of the Py1 and Per moieties were observed. STS results revealed that the apparent energy gaps for the Py1 and the Py2 were appreciably different due to possible asymmetric adsorption configurations. The apparent energy gap for the Per moiety measured by STS was in agreement with the hybrid density functional theory (DFT) simulations. In a parallel study, another molecule (Py-e-Per-e-Py) was also studied by using STM/STS for further confirmation of the proposed mechanism.",

author = "Li, {Yi Bao} and Wan, {Jun Hua} and Guicun Qi and Ke Deng and Yanlian Yang and Qingdao Zeng and Wei Huang and Chen Wang",

year = "2009",

month = may,

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doi = "10.1016/j.cplett.2009.04.034",

language = "英语",

volume = "474",

pages = "132--136",

journal = "Chemical Physics Letters",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Influence of asymmetric adsorption on electronic states of molecule studied by scanning tunneling microscopy and spectroscopy

AU - Li, Yi Bao

AU - Wan, Jun Hua

AU - Qi, Guicun

AU - Deng, Ke

AU - Yang, Yanlian

AU - Zeng, Qingdao

AU - Huang, Wei

AU - Wang, Chen

PY - 2009/5/25

Y1 - 2009/5/25

N2 - The electronic states of unique molecule (Py-Per-Py), composed of two pyrene (Py1 and Py2) units, were investigated by using scanning tunneling microscopy and spectroscopy (STM/STS) at the liquid/solid interface. Bias-polarity-dependence of STM images of the Py1 and Per moieties were observed. STS results revealed that the apparent energy gaps for the Py1 and the Py2 were appreciably different due to possible asymmetric adsorption configurations. The apparent energy gap for the Per moiety measured by STS was in agreement with the hybrid density functional theory (DFT) simulations. In a parallel study, another molecule (Py-e-Per-e-Py) was also studied by using STM/STS for further confirmation of the proposed mechanism.

AB - The electronic states of unique molecule (Py-Per-Py), composed of two pyrene (Py1 and Py2) units, were investigated by using scanning tunneling microscopy and spectroscopy (STM/STS) at the liquid/solid interface. Bias-polarity-dependence of STM images of the Py1 and Per moieties were observed. STS results revealed that the apparent energy gaps for the Py1 and the Py2 were appreciably different due to possible asymmetric adsorption configurations. The apparent energy gap for the Per moiety measured by STS was in agreement with the hybrid density functional theory (DFT) simulations. In a parallel study, another molecule (Py-e-Per-e-Py) was also studied by using STM/STS for further confirmation of the proposed mechanism.

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U2 - 10.1016/j.cplett.2009.04.034

DO - 10.1016/j.cplett.2009.04.034

M3 - 文章

AN - SCOPUS:65649094515

SN - 0009-2614

VL - 474

SP - 132

EP - 136

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Influence of asymmetric adsorption on electronic states of molecule studied by scanning tunneling microscopy and spectroscopy

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