Single-step electropolymerization patterning of a polypyrrole nanowire by ultra-short pulses via an AFM cantilever

Kihwan Nam, Gyudo Lee, Huihun Jung, Jinsung Park, Chi Hyun Kim, Jongbum Seo, Dae Sung Yoon, Sang Woo Lee, Taeyun Kwon

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Conducting polymers (CPs) have attracted a great deal of attention due to their unique properties; these properties are useful in implementing various functional devices, such as memory, and chemical and biological sensors. In particular, the nanopatterning of CPs is a key technology that will accelerate the adoption of CPs in fabricating nanoscaled multifunctional devices. This paper presents an innovative technique for forming polypyrrole nanowire (PPy-NW) patterns, without any additional pretreatment on the gold surface, using atomic force microscopy (AFM) and ultra-short pulse voltage. Applying the ultra-short pulse voltage to the AFM tip has the following advantage: since the electrochemical current is extremely localized around the tip, the successful formation of CP nanowires results. This is because the pulse width is much shorter than the resistor-capacitor (RC) time constant of the equivalent electrochemical circuit of our experimental set-up. This paper provides systematic results regarding the dimensional variation of the PPy-NW patterns produced by varying the electrical conditions of the ultra-short pulse, such as the pulse amplitude, width, and frequency. The results show that use of an ultra-short pulse is essential in fabricating PPy-NW patterns. Additionally, an ultra-short pulse offers excellent pattern controllability for both width (353nm ∼ 3.37νm) and height (2.0 ∼ 88.3nm).

Original languageEnglish
Article number225303
JournalNanotechnology
Volume22
Issue number22
DOIs
Publication statusPublished - 2011 Jun 3

Fingerprint

Electropolymerization
Polypyrroles
Ultrashort pulses
Nanowires
Conducting polymers
Atomic force microscopy
Electric potential
Controllability
Gold
Resistors
Laser pulses
Capacitors
polypyrrole
Data storage equipment
Networks (circuits)
Sensors

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Nam, Kihwan ; Lee, Gyudo ; Jung, Huihun ; Park, Jinsung ; Kim, Chi Hyun ; Seo, Jongbum ; Yoon, Dae Sung ; Lee, Sang Woo ; Kwon, Taeyun. / Single-step electropolymerization patterning of a polypyrrole nanowire by ultra-short pulses via an AFM cantilever. In: Nanotechnology. 2011 ; Vol. 22, No. 22.
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Single-step electropolymerization patterning of a polypyrrole nanowire by ultra-short pulses via an AFM cantilever. / Nam, Kihwan; Lee, Gyudo; Jung, Huihun; Park, Jinsung; Kim, Chi Hyun; Seo, Jongbum; Yoon, Dae Sung; Lee, Sang Woo; Kwon, Taeyun.

In: Nanotechnology, Vol. 22, No. 22, 225303, 03.06.2011.

Research output: Contribution to journalArticle

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AU - Nam, Kihwan

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