Length and temperature dependence of electrical conduction through dithiolated porphyrin arrays

Bong Keun Kang; Naoki Aratani; Jong Kuk Lim; Dongho Kim; Atsuhiro Osuka; Kyung Hwa Yoo

doi:10.1016/j.cplett.2005.07.008

Length and temperature dependence of electrical conduction through dithiolated porphyrin arrays

Bong Keun Kang, Naoki Aratani, Jong Kuk Lim, Dongho Kim, Atsuhiro Osuka, Kyung Hwa Yoo

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48 Citations (Scopus)

Abstract

We present an investigation of electrical transport through fused and orthogonal dithiolated porphyrin arrays of different molecular lengths. Length dependence measurements show that conductance decreases much more slowly with molecular length than the exponential dependence expected for a coherent tunneling process. It suggests that the electrical conduction through porphyrin arrays is mainly due to the thermally activated hopping transport. From the temperature dependence of I_SD-V_SD curves, the thermal activation energy E_a is estimated to be about 0.35 eV at zero-bias voltage, independently of molecular conformation and length.

Original language	English
Pages (from-to)	303-306
Number of pages	4
Journal	Chemical Physics Letters
Volume	412
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2005.07.008
Publication status	Published - 2005 Sept 5

Bibliographical note

Funding Information:
This work has been financially supported by the Korea Science and Engineering Foundation (KOSEF) through National Core Research Center for Nanomedical Technology (K.H.Y.) and the National Creative Research Initiatives Program of KOSEF (D.K.). The work at Kyoto was supported by the Core Research for Evolutional Science and Technology of Japan Science and Technology Corporation (CREST).

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/j.cplett.2005.07.008

Cite this

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title = "Length and temperature dependence of electrical conduction through dithiolated porphyrin arrays",

abstract = "We present an investigation of electrical transport through fused and orthogonal dithiolated porphyrin arrays of different molecular lengths. Length dependence measurements show that conductance decreases much more slowly with molecular length than the exponential dependence expected for a coherent tunneling process. It suggests that the electrical conduction through porphyrin arrays is mainly due to the thermally activated hopping transport. From the temperature dependence of ISD-VSD curves, the thermal activation energy Ea is estimated to be about 0.35 eV at zero-bias voltage, independently of molecular conformation and length.",

author = "Kang, {Bong Keun} and Naoki Aratani and Lim, {Jong Kuk} and Dongho Kim and Atsuhiro Osuka and Yoo, {Kyung Hwa}",

note = "Funding Information: This work has been financially supported by the Korea Science and Engineering Foundation (KOSEF) through National Core Research Center for Nanomedical Technology (K.H.Y.) and the National Creative Research Initiatives Program of KOSEF (D.K.). The work at Kyoto was supported by the Core Research for Evolutional Science and Technology of Japan Science and Technology Corporation (CREST).",

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doi = "10.1016/j.cplett.2005.07.008",

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T1 - Length and temperature dependence of electrical conduction through dithiolated porphyrin arrays

AU - Kang, Bong Keun

AU - Aratani, Naoki

AU - Lim, Jong Kuk

AU - Kim, Dongho

AU - Osuka, Atsuhiro

AU - Yoo, Kyung Hwa

N1 - Funding Information: This work has been financially supported by the Korea Science and Engineering Foundation (KOSEF) through National Core Research Center for Nanomedical Technology (K.H.Y.) and the National Creative Research Initiatives Program of KOSEF (D.K.). The work at Kyoto was supported by the Core Research for Evolutional Science and Technology of Japan Science and Technology Corporation (CREST).

PY - 2005/9/5

Y1 - 2005/9/5

N2 - We present an investigation of electrical transport through fused and orthogonal dithiolated porphyrin arrays of different molecular lengths. Length dependence measurements show that conductance decreases much more slowly with molecular length than the exponential dependence expected for a coherent tunneling process. It suggests that the electrical conduction through porphyrin arrays is mainly due to the thermally activated hopping transport. From the temperature dependence of ISD-VSD curves, the thermal activation energy Ea is estimated to be about 0.35 eV at zero-bias voltage, independently of molecular conformation and length.

AB - We present an investigation of electrical transport through fused and orthogonal dithiolated porphyrin arrays of different molecular lengths. Length dependence measurements show that conductance decreases much more slowly with molecular length than the exponential dependence expected for a coherent tunneling process. It suggests that the electrical conduction through porphyrin arrays is mainly due to the thermally activated hopping transport. From the temperature dependence of ISD-VSD curves, the thermal activation energy Ea is estimated to be about 0.35 eV at zero-bias voltage, independently of molecular conformation and length.

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Length and temperature dependence of electrical conduction through dithiolated porphyrin arrays

Abstract

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