Nanopatterning and nanocharge writing in layer-by-layer quinquethiophene/phthalocyanine ultrathin films

Akira Baba, Jason Locklin, Risheng Xu, Rigoberto Advincula

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Nanometer-scale patterning and charging in layer-by-layer (LbL) ultrathin films of quinquethiophene (5TN)/phthalocyanine (CuPS) provides a novel write-read device using a standard current-sensing atomic force microscopy (CS-AFM). The AFM height images showed dented or raised morphological features that could be selectively manipulated by changing the direction of the bias voltages. The conductivity was repeatedly changed between a conductive and insulating state, originating from an electrochemical charging-discharging effect. This was attributed to electrochemical ion transport and the residual mobile ions present in LbL films. Finally, the nanocharge pattern was written by CS-AFM and read out in a conductivity map image.

Original languageEnglish
Pages (from-to)42-45
Number of pages4
JournalJournal of Physical Chemistry B
Volume110
Issue number1
DOIs
Publication statusPublished - 2006 Jan 12
Externally publishedYes

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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