中文版 | English
Title

Optical Humidity Sensor Based on CdSe/ZnS Quantum Dots Modified by Porous Silica

Author
Corresponding AuthorChen, Rui
Publication Years
2022-09-01
DOI
Source Title
ISSN
2196-7350
Abstract
Ultra-sensitive optical humidity sensors based on nanomaterials play important roles in the fields of science and industry. The related research has been reported, however, the underlying physical mechanism is still unclear. In order to clarify this point, and further improve the sensing performance, herein, optical humidity sensor based on porous silica/quantum dots (PS/QDs) hybrid nanoarchitecture has been developed. PS is selected to enhance emission of QDs due to its large surface roughness, which can improve light utilization. Under optimized conditions, the emission from the hybrid PS/QDs can be enhanced 6.5 times compared with the as-grown QDs. With the increase of relative humidity from 20% to 80%, the hybrid PS/QDs demonstrate excellent response, wide sensing range, fast response time (22-40 s), good selectivity, and repeatability. Based on laser spectroscopy, the sensing mechanism is ascribed to the passivation of the surface defects by water molecules, which results in enhanced emission. This work provides a simple and low-cost method to fabricate humidity sensors and shows promising applications in environmental detection.
Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
National Natural Science Foundation of China[62174079] ; Science, Technology and Innovation Commission of Shenzhen Municipality["JCYJ20210324120204011","KQTD2015071710313656"] ; Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological Innovation[pdjh2021c0019]
WOS Research Area
Chemistry ; Materials Science
WOS Subject
Chemistry, Multidisciplinary ; Materials Science, Multidisciplinary
WOS Accession No
WOS:000850605800001
Publisher
EI Accession Number
20223712722404
EI Keywords
Cadmium compounds ; Humidity sensors ; II-VI semiconductors ; Molecules ; Nanocrystals ; Semiconductor quantum dots ; Silica ; Surface roughness
ESI Classification Code
Meteorological Instrumentation:443.2 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3 ; Crystalline Solids:933.1 ; Materials Science:951
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:2
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/395914
DepartmentDepartment of Electrical and Electronic Engineering
Affiliation
Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
First Author AffilicationDepartment of Electrical and Electronic Engineering
Corresponding Author AffilicationDepartment of Electrical and Electronic Engineering
First Author's First AffilicationDepartment of Electrical and Electronic Engineering
Recommended Citation
GB/T 7714
Yuan, Baozhen,Zhang, Xuanyu,Yu, Jiahao,et al. Optical Humidity Sensor Based on CdSe/ZnS Quantum Dots Modified by Porous Silica[J]. Advanced Materials Interfaces,2022.
APA
Yuan, Baozhen.,Zhang, Xuanyu.,Yu, Jiahao.,Zhou, Leiqing.,Luo, Bingshen.,...&Chen, Rui.(2022).Optical Humidity Sensor Based on CdSe/ZnS Quantum Dots Modified by Porous Silica.Advanced Materials Interfaces.
MLA
Yuan, Baozhen,et al."Optical Humidity Sensor Based on CdSe/ZnS Quantum Dots Modified by Porous Silica".Advanced Materials Interfaces (2022).
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