Effect of size and chemical composition of graphene oxide nanoparticles on optical absorption cross-section

J Biomed Opt. 2018 Aug;23(8):1-9. doi: 10.1117/1.JBO.23.8.085007.

Abstract

Photothermal therapy with various nanoparticles, as photothermal transducers, is a widely researched technique. A continuous wave (CW) laser is employed during this procedure. The therapeutic setup is slightly modified to measure the optical absorption cross-section of the graphene oxide (GO), by mitigating the effects of heat diffusion and light scattering. With an 808-nm CW laser setup modulated by a waveform modulation setup, the effect of nanoparticle size and composition of GO in water on optical absorption cross section is characterized.

Keywords: absorption coefficient; cross-section absorption; graphene oxide; laser.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Absorption, Physicochemical
  • Graphite / chemistry*
  • Lasers
  • Materials Testing
  • Nanoparticles / chemistry*
  • Particle Size
  • Scattering, Radiation
  • Water

Substances

  • graphene oxide
  • Water
  • Graphite