Graphene oxide/N-methyl-2-pyrrolidone charge-transfer complexes for molecular detection

Guoqing Xin, Suhyun Gong, Namhun Kim, Jehyung Kim, Wontae Hwang, Jaewook Nam, Yong Hoon Cho, Sung Min Cho, Heeyeop Chae

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Charge transfer complex (CTC) has been formed between photoluminescent graphene oxide (GO) as electron acceptor and N-methylpyrrolidone (NMP) as electron donor. Studies of UV absorption and photoluminescence (PL) suggest that the formation of CTC results in a red-shift of absorption and a new PL emission. Decay dynamics was described by time-resolved PL spectra and a clear ultrafast charge-transfer process was observed from the PL rise times. The PL of the CTC was sensitive to external components, allowing molecular detection of 7,7,8,8-tetracyanoquinodimethane and 1,3,5-trinitrobenzene up to hundred nanomolar concentration levels through the photoluminescence signals.

Original languageEnglish
Pages (from-to)81-85
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume176
DOIs
Publication statusPublished - 2013

Keywords

  • Charge-transfer complex
  • Graphene
  • Graphene oxide
  • Molecular sensor
  • Time-resolved photoluminescent spectra

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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