Polythiophene precursor electrochemical nanolithography: Highly local thermal and morphological characterization

Jin Young Park, Prasad Taranekar, Rigoberto Advincula

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We describe the formation of nanopatterns on an electroactive polythiophene precursor (polyterthiophene methylmethacrylate, P3T) film using a current-sensing atomic force microscopy (CS-AFM) technique. Patterning parameters such as applied bias voltages, sweep duration, and scan rate were adapted for the nanolithographic electrochemical patterning process. The formation of nanopatterns on the film was mainly attributed to the electrochemical cross-linking and oxidation process of the terthiophene units. This is related to the electron transport process under an applied electric field and mass transfer due to Joule heating generated in a localized area from the tip. To further highlight the role of Joule heating, thermal AFM lithography of various blend film compositions (P3T:PMMA) was made using the heated tip AFM (HT-AFM) method. The thermal effects on local morphology were then studied not only as a function of sequential increase in local temperature, but also by nano-scale direct thermal-writing.

Original languageEnglish
Pages (from-to)1849-1855
Number of pages7
JournalSoft Matter
Volume7
Issue number5
DOIs
Publication statusPublished - 2011 Mar 7
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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