TY - GEN
T1 - Single-electron charging effects observed in arrays of gold nanoparticles formed by dielectrophoresis between SAM-coated electrodes
AU - Moribayashi, Makoto
AU - Yagai, Tomoki
AU - Moriya, Masataka
AU - Shimada, Hiroshi
AU - Hirano-Iwata, Ayumi
AU - Hirose, Fumihiko
AU - Mizugaki, Yoshinao
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI Grant Number 17K04979, and by JST-CREST Grant Number JPMJCR14F. Nation-Wide Cooperative Research Projects, Research Institute of Electrical Communication, Tohoku University are also acknowledged.
Publisher Copyright:
© 2019 Author(s).
PY - 2019/1/24
Y1 - 2019/1/24
N2 - In the fabrication of single-electron (SE) devices with gold nanoparticles (GNPs), one of the technical challenges is the arrangement of GNPs into a gap between electrodes. We employed dielectrophoresis (DEP) for the GNP arrangement because it allowed flexible fabrication conditions. When we tried to arrange GNPs into a gap between electrodes, we often had an excessive current during DEP, which resulted in poor fabrication yields. It suggested that the Joule heat generated by the excessive current could break or fused arrays of GNPs when the electrodes were bridged through the arrays. In order to solve this problem, we coated the electrode surfaces with a self-assembled monolayer (SAM) of dithiol, by which high resistance between GNPs and electrodes was realized. That is, suppression of excess currents and improvement of fabrication yield were confirmed. We also demonstrated that a sample device fabricated by using this method exhibited not only the Coulomb blockade but also the Coulomb oscillation.
AB - In the fabrication of single-electron (SE) devices with gold nanoparticles (GNPs), one of the technical challenges is the arrangement of GNPs into a gap between electrodes. We employed dielectrophoresis (DEP) for the GNP arrangement because it allowed flexible fabrication conditions. When we tried to arrange GNPs into a gap between electrodes, we often had an excessive current during DEP, which resulted in poor fabrication yields. It suggested that the Joule heat generated by the excessive current could break or fused arrays of GNPs when the electrodes were bridged through the arrays. In order to solve this problem, we coated the electrode surfaces with a self-assembled monolayer (SAM) of dithiol, by which high resistance between GNPs and electrodes was realized. That is, suppression of excess currents and improvement of fabrication yield were confirmed. We also demonstrated that a sample device fabricated by using this method exhibited not only the Coulomb blockade but also the Coulomb oscillation.
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U2 - 10.1063/1.5089452
DO - 10.1063/1.5089452
M3 - Conference contribution
AN - SCOPUS:85061152060
T3 - AIP Conference Proceedings
BT - Irago Conference 2018
A2 - Sandhu, Adarsh
A2 - Taki, Masumi
A2 - Kishimoto, Tetsuo
A2 - Sharma, Jaiyam
PB - American Institute of Physics Inc.
T2 - 8th Irago Conference 2018: A 360-Degree Outlook on Critical Scientific and Technological Challenges for a Sustainable Society
Y2 - 1 November 2018
ER -