Graphene quantum dots produced by exfoliation of intercalated graphite nanoparticles and their application for temperature sensors
- Authors
- Nguyen, Duy Khiem; Kim, TaeYoung
- Issue Date
- 1-Jan-2018
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Graphene quantum dots; Temperature sensors; Graphite intercalation compounds
- Citation
- APPLIED SURFACE SCIENCE, v.427, pp.1152 - 1157
- Journal Title
- APPLIED SURFACE SCIENCE
- Volume
- 427
- Start Page
- 1152
- End Page
- 1157
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/4175
- DOI
- 10.1016/j.apsusc.2017.09.020
- ISSN
- 0169-4332
- Abstract
- Graphene quantum dots (GQDs) have received much attention as a new class of fluorescent materials due to their unique transport phenomena and broadband absorption. Here, we present a method to produce pristine blue-luminescent GQDs from graphite nanoparticles by the intercalation of graphite nanoparticles and subsequent exfoliation in liquids. The as-synthesized GQDs are composed of highly crystalline carbon rings and show uniform size distribution ranging from 3 to 4 nm with an average thickness of similar to 1 nm. The GQDs exhibit an excitation-dependent blue photoluminescence with a quantum yield of 22.3%. Furthermore, the GQDs were explored as an active sensing material for temperature measurement. The GQD-based temperature sensors show high responsivity to temperature changes over the range 30-80 degrees C. (C) 2017 Elsevier B.V. All rights reserved.
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Collections - 공과대학 > 신소재공학과 > 1. Journal Articles
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