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A highly stable opt...
A highly stable optical humidity sensors based on nano-composite film
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Chen, M. (author)
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Xue, S. (author)
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Liu, L. (author)
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Li, Z. (author)
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Wang, H. (author)
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Tan, C. (author)
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Yang, J. (author)
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Hu, X. (author)
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Jiang, X. -F (author)
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Cheng, Y. (author)
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Xing, X. (author)
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- He, Sailing (author)
- KTH,Elektroteknisk teori och konstruktion
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(creator_code:org_t)
- Elsevier, 2019
- 2019
- English.
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In: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 287, s. 329-337
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We report a highly stable humidity sensor based on nanocomposite film obtained by depositing Au nanoparticles on the surface of 3-mercaptopropionic acid (MPA) capped CdTe quantum dots (QDs) and then modifying NaOH (CdTe@Au/NaOH). The CdTe@Au/NaOH film will form compound salts that can be dissolved or crystallized with humidity changes, resulting in a significant absorption variation of green light, which is very benefit for water vapor detection. In this study, we systematically investigated the influence on the performance of humidity sensing by varying the thickness of Au layer as well as the concentration of NaOH. Our results show that the quickest response-recovery time (˜less than 30 s) was found in the sensing film with the Au layer thickness of 20 nm and NaOH concentration of 1M, which can be ascribed to the combined effects of the better morphology and the yield of compound salts. The repeatable response and recovery measurements demonstrate that the designed sensors exhibit an ultralow humidity detection level with fast response-recovery time, high stability and reproducibility at room temperature. The simplicity, low fabrication cost, and wide working range of the humidity sensor will pave the way for its application in environments and gas detection.
Subject headings
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Keyword
- Nano-composite film
- Optical humidity sensors
- Quantum dots
- Transmission
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Chen, M.
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Xue, S.
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Liu, L.
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Li, Z.
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Wang, H.
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Tan, C.
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show more...
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Yang, J.
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Hu, X.
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Jiang, X. -F
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Cheng, Y.
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Xing, X.
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He, Sailing
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Other Chemistry ...
- Articles in the publication
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Sensors and actu ...
- By the university
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Royal Institute of Technology