Targeted Raman Imaging of Cells Using Graphene Oxide-Based Hybrids

Langmuir. 2016 Oct 11;32(40):10253-10258. doi: 10.1021/acs.langmuir.6b02248. Epub 2016 Sep 30.

Abstract

Graphene oxide (GO) is a reliable and multifunctional platform to perform cell imaging. In this work, a controllable Pt-seed-mediated method is used to prepare GO/gold nanoparticle (AuNP) hybrids, and after the covalent binding of folic acid (FA), GO/AuNP/FA hybrids are prepared. Selective labeling and Raman imaging of folate receptor (FR)-positive HeLa cells are realized using such GO-based hybrids. In this system, FA is the targeting agent, AuNPs work as surface-enhanced Raman scattering substrates, and GO takes the role of both supporting the AuNPs with FA and acting as a Raman probe. This research further extends the application of GO as a multifunctional platform in bioimaging and other biomedical processes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line, Tumor
  • Folate Receptors, GPI-Anchored / metabolism
  • Folic Acid / chemistry
  • Folic Acid / metabolism
  • Gold / chemistry
  • Graphite / chemistry*
  • Humans
  • Metal Nanoparticles / chemistry*
  • Neoplasms / diagnostic imaging*
  • Oxides / chemistry*
  • Spectrum Analysis, Raman / methods
  • Thioglycolates / chemistry

Substances

  • Folate Receptors, GPI-Anchored
  • Oxides
  • Thioglycolates
  • Gold
  • Graphite
  • 2-mercaptoacetate
  • Folic Acid