Laser direct writing of microstructure on graphene oxide/metal oxide hybrid film

Akira Watanabe, Mohammod Aminuzzaman, Jinguang Cai, Md Akhtaruzzaman, Sayaka Ogawa, Eiji Aoyagi, Shun Ito

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A conductive microstructure consisting of a reduced graphene oxide (rGO) and Cu was prepared by laser direct writing. A hybrid film on a polymer substrate was prepared from a water-dispersion mixture of graphene oxide (GO) and CuO nanorods (CuO NRs) by doctor blade method. A CW 405 nm blue-violet laser beam was scanned on the GO/CuO NRs hybrid film through an objective lens to prepare a microstructure of rGO/Cu on a flexible substrate. The reduction of CuO NRs to Cu was observed by micro-Raman spectroscopy. The surface resistivity of a laser scanned hybrid film was lowered with decreasing laser scan spacing. A hybrid film consisting of rGO/Cu microstructure showed a negative temperature coefficient of resistance (-1.18%/oC), which was extremely larger than those of usual carbon materials. Such characteristics can be applied to an IR photosensor.

Original languageEnglish
Pages (from-to)223-226
Number of pages4
JournalJournal of Photopolymer Science and Technology
Volume32
Issue number2
DOIs
Publication statusPublished - 2019

Keywords

  • CuO nanorods
  • Graphene oxide
  • IR photosensor
  • Laser direct writing
  • Laser-induced reduction
  • Reduced graphene oxide

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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