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

Guoqing Xin, Su-Hyun 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 Jan 1
Externally publishedYes

Fingerprint

Graphite
Oxides
Graphene
Charge transfer
Photoluminescence
graphene
charge transfer
photoluminescence
oxides
Electrons
red shift
N-methylpyrrolidone
electrons
decay

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

Cite this

Graphene oxide/N-methyl-2-pyrrolidone charge-transfer complexes for molecular detection. / Xin, Guoqing; Gong, Su-Hyun; Kim, Namhun; Kim, Jehyung; Hwang, Wontae; Nam, Jaewook; Cho, Yong Hoon; Cho, Sung Min; Chae, Heeyeop.

In: Sensors and Actuators, B: Chemical, Vol. 176, 01.01.2013, p. 81-85.

Research output: Contribution to journalArticle

Xin, Guoqing ; Gong, Su-Hyun ; Kim, Namhun ; Kim, Jehyung ; Hwang, Wontae ; Nam, Jaewook ; Cho, Yong Hoon ; Cho, Sung Min ; Chae, Heeyeop. / Graphene oxide/N-methyl-2-pyrrolidone charge-transfer complexes for molecular detection. In: Sensors and Actuators, B: Chemical. 2013 ; Vol. 176. pp. 81-85.
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AU - Hwang, Wontae

AU - Nam, Jaewook

AU - Cho, Yong Hoon

AU - Cho, Sung Min

AU - Chae, Heeyeop

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