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- Kim, Je-Hyung
- Solid-State Quantum Architecture Lab.
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Graphene oxide/N-methyl-2-pyrrolidone charge-transfer complexes for molecular detection
- Author(s)
- Xin, Guoqing, Gong, Suhyun, Kim, Namhun, Kim, Jehyung, Hwang, Wontae, Nam, Jaewook, Cho, Yong-Hoon, Cho, Sung Min, Chae, Heeyeop
- Issued Date
- 2013-01
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.176, pp.81 - 85
- 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.
- Publisher
- ELSEVIER SCIENCE SA
- ISSN
- 0925-4005
- Keyword (Author)
- Graphene, Graphene oxide, Charge-transfer complex, Molecular sensor, Time-resolved photoluminescent spectra
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