Optical Fiber Temperature Sensor Utilizing Alloyed ZnxCd1-xS Quantum Dots
- Authors
- Zhao, Fei; Kim, Jongsung
- Issue Date
- Aug-2014
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Optical Fiber; Temperature Sensor; Alloyed Quantum Dots; Sol-Gel; Silica Encapsulation
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.14, no.8, pp.6008 - 6011
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 14
- Number
- 8
- Start Page
- 6008
- End Page
- 6011
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/12394
- DOI
- 10.1166/jnn.2014.8453
- ISSN
- 1533-4880
- Abstract
- In this paper, optical fiber temperature sensors have been prepared by using alloyed ZnxCd1-xS quantum dots as sensing media. The surface of the optical fiber was silanized to enhance covalent bond between quantum dots and optical fiber. The quantum dots were bonded to the surface of optical fiber and further encapsulated via sol-gel coating using 3-glycidoxypropyl trimethoxysilane (GPTMS) and 3-aminopropyl trimethoxysilane (APTMS) in ethyl alcohol in acidic condition. Quantum dots with green, yellow, and red fluorescence were used. The dependence of photoluminescence (PL) intensity from quantum dots on ambient temperature has been studied. Linear relation between the fluorescent intensity and temperature was obtained from alloyed quantum dots immobilized on the surface of optical fiber. The PL intensity, sensitivity, and thermal stability were increased by the silica encapsulation.
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