Laser-induced reduction of graphene oxide powders by high pulsed ultraviolet laser irradiations

Chii Rong Yang, Shih Feng Tseng, Yu Ting Chen

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

This study aims to develop a laser-induced reduction approach for graphene oxide (GO) powders fabricated by using high pulsed ultraviolet laser irradiations. Before and after the laser irradiation with different fluences, the physical and electrical properties of homemade GO powders and reduced graphene oxide (rGO) powders were measured and analyzed using Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), surface area analyzer, and four-point probe instrument. The laser irradiation parameters included the pulse repetition frequency of 100 kHz, the scanning speed of galvanometers of 50 mm/s, the number of laser irradiated cycles of 10, and the laser fluences of ranging from 0.153 mJ/cm 2 to 0.525 mJ/cm 2 . The laser reduction experiments of GO powders demonstrated that the largest relative intensity of the 2D peak and specific surface area were found at the laser fluence of 0.438 mJ/cm 2 . Moreover, the electrical resistance sharply decreased from 280 MΩ in the initial GO powders to 0.267 MΩ in rGO powders at a laser irradiation fluence of 0.438. The C/O ratio was increased from 0.232 in the initial GO powders to 1.86 in the rGO powders at a laser irradiation fluence of 0.525 mJ/cm 2 ; furthermore, the C/O ratios increased with increasing the laser fluences.

Original languageEnglish
Pages (from-to)578-583
Number of pages6
JournalApplied Surface Science
Volume444
DOIs
Publication statusPublished - 2018 Jun 30

Keywords

  • Graphene oxide powders
  • Laser-induced reduction
  • Raman spectroscopy
  • Surface area analyzer
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Laser-induced reduction of graphene oxide powders by high pulsed ultraviolet laser irradiations'. Together they form a unique fingerprint.

Cite this