Electrical transport properties and their reproducibility for linear porphyrin arrays

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

Research output: Contribution to journalArticle

18 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 from a simple theoretical model. 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, independent of molecular conformation and length. At high-bias voltages, however, the decrease in Ea as a function of bias voltage is more significant for the longer porphyrin arrays. We have also studied the thermal cycling effects. After thermal cycling, dithiolated porphyrin arrays are found to aggregate into clusters between nanoelectrodes. This is probably due to the diffusion of porphyrin arrays on the SiO2 substrate at low temperatures, which enhances the conductance.

Original languageEnglish
Pages (from-to)1023-1027
Number of pages5
JournalMaterials Science and Engineering C
Volume26
Issue number5-7
DOIs
Publication statusPublished - 2006 Jul 1

Fingerprint

Porphyrins
porphyrins
Transport properties
Bias voltage
transport properties
Thermal cycling
electric potential
cycles
Conformations
Activation energy
activation energy
Temperature
temperature dependence
Substrates
curves

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Kang, Bong Keun ; Aratani, Naoki ; Lim, Jong Kuk ; Kim, Dongho ; Osuka, Atsuhiro ; Yoo, Kyung Hwa. / Electrical transport properties and their reproducibility for linear porphyrin arrays. In: Materials Science and Engineering C. 2006 ; Vol. 26, No. 5-7. pp. 1023-1027.
@article{8a8014cf19fc4cc6863022b53ebfb1d7,
title = "Electrical transport properties and their reproducibility for linear 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 from a simple theoretical model. 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, independent of molecular conformation and length. At high-bias voltages, however, the decrease in Ea as a function of bias voltage is more significant for the longer porphyrin arrays. We have also studied the thermal cycling effects. After thermal cycling, dithiolated porphyrin arrays are found to aggregate into clusters between nanoelectrodes. This is probably due to the diffusion of porphyrin arrays on the SiO2 substrate at low temperatures, which enhances the conductance.",
author = "Kang, {Bong Keun} and Naoki Aratani and Lim, {Jong Kuk} and Dongho Kim and Atsuhiro Osuka and Yoo, {Kyung Hwa}",
year = "2006",
month = "7",
day = "1",
doi = "10.1016/j.msec.2005.09.090",
language = "English",
volume = "26",
pages = "1023--1027",
journal = "Materials Science and Engineering C",
issn = "0928-4931",
publisher = "Elsevier BV",
number = "5-7",

}

Electrical transport properties and their reproducibility for linear porphyrin arrays. / Kang, Bong Keun; Aratani, Naoki; Lim, Jong Kuk; Kim, Dongho; Osuka, Atsuhiro; Yoo, Kyung Hwa.

In: Materials Science and Engineering C, Vol. 26, No. 5-7, 01.07.2006, p. 1023-1027.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electrical transport properties and their reproducibility for linear porphyrin arrays

AU - Kang, Bong Keun

AU - Aratani, Naoki

AU - Lim, Jong Kuk

AU - Kim, Dongho

AU - Osuka, Atsuhiro

AU - Yoo, Kyung Hwa

PY - 2006/7/1

Y1 - 2006/7/1

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 from a simple theoretical model. 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, independent of molecular conformation and length. At high-bias voltages, however, the decrease in Ea as a function of bias voltage is more significant for the longer porphyrin arrays. We have also studied the thermal cycling effects. After thermal cycling, dithiolated porphyrin arrays are found to aggregate into clusters between nanoelectrodes. This is probably due to the diffusion of porphyrin arrays on the SiO2 substrate at low temperatures, which enhances the conductance.

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 from a simple theoretical model. 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, independent of molecular conformation and length. At high-bias voltages, however, the decrease in Ea as a function of bias voltage is more significant for the longer porphyrin arrays. We have also studied the thermal cycling effects. After thermal cycling, dithiolated porphyrin arrays are found to aggregate into clusters between nanoelectrodes. This is probably due to the diffusion of porphyrin arrays on the SiO2 substrate at low temperatures, which enhances the conductance.

UR - http://www.scopus.com/inward/record.url?scp=33646850388&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33646850388&partnerID=8YFLogxK

U2 - 10.1016/j.msec.2005.09.090

DO - 10.1016/j.msec.2005.09.090

M3 - Article

AN - SCOPUS:33646850388

VL - 26

SP - 1023

EP - 1027

JO - Materials Science and Engineering C

JF - Materials Science and Engineering C

SN - 0928-4931

IS - 5-7

ER -