ICCAS OpenIR
From Tunneling to Hopping: A Comprehensive Investigation of Charge Transport Mechanism in Molecular Junctions Based on Oligo(p-phenylene ethynylene)s
Lu, Qi1,2; Liu, Ke1; Zhang, Hongming1; Du, Zhibo1; Wang, Xianhong1; Wang, Fosong1
2009-12-01
Source PublicationACS NANO
ISSN1936-0851
Volume3Issue:12Pages:3861-3868
AbstractThe charge transport mechanism of oligo(p-phenylene ethynylene)s with lengths ranging from 0.98 to 5.11 nm was investigated using modified scanning tunneling microscopy break junction and conducting probe atomic force microscopy methods. The methods were based on observing the length dependence of molecular resistance at single molecule level and the current-voltage characteristics in a wide length distribution. An intrinsic transition from tunneling to hopping charge transport mechanism was observed near 2.75 nm. A new transitional zone was observed in the long length molecular wires compared to short ones. This was not a simple transition between direct tunneling and field emission, which may provide new insights into transport mechanism investigations. Theoretical calculations provided an essential explanation for these phenomena in terms of molecular electronic structures.
KeywordOligo(P-phenylene Ethynylene)s Charge Transport Mechanism Tunneling Conduction Hopping Conduction Scanning Tunneling Microscopy Conducting Probe Atomic Force Microscopy Single Molecular Resistance
DOI10.1021/nn9012687
Indexed BySCI
Language英语
WOS IDWOS:000272846000016
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:1491[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/68222
Collection中国科学院化学研究所
Corresponding AuthorWang, Xianhong
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Lu, Qi,Liu, Ke,Zhang, Hongming,et al. From Tunneling to Hopping: A Comprehensive Investigation of Charge Transport Mechanism in Molecular Junctions Based on Oligo(p-phenylene ethynylene)s[J]. ACS NANO,2009,3(12):3861-3868.
APA Lu, Qi,Liu, Ke,Zhang, Hongming,Du, Zhibo,Wang, Xianhong,&Wang, Fosong.(2009).From Tunneling to Hopping: A Comprehensive Investigation of Charge Transport Mechanism in Molecular Junctions Based on Oligo(p-phenylene ethynylene)s.ACS NANO,3(12),3861-3868.
MLA Lu, Qi,et al."From Tunneling to Hopping: A Comprehensive Investigation of Charge Transport Mechanism in Molecular Junctions Based on Oligo(p-phenylene ethynylene)s".ACS NANO 3.12(2009):3861-3868.
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