Acetone sensing property of ZnO quantum dots embedded on PVP

We report synthesis of ZnO quantum dot embedded in polyvinylpyrrolidone (PVP) matrix and its functioning as acetone sensor. The specimen is prepared via quenching technique where bulk ZnO powder is calcined at very high temperature of 1200 °C and then quenched into ice cold polyvinylpyrrolidone solu...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2010-07, Vol.148 (2), p.353-357
Main Authors: Nath, S.S., Choudhury, M., Chakdar, D., Gope, G., Nath, R.K.
Format: Article
Language:English
Subjects:
Acetone
Detection
Operating temperature
Polyvinylpyrrolidone
Quantum dot
Quantum dots
Quenching
Roasting
Scanning electron microscopy
Sensor
Sensors
Zinc oxide
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Summary:We report synthesis of ZnO quantum dot embedded in polyvinylpyrrolidone (PVP) matrix and its functioning as acetone sensor. The specimen is prepared via quenching technique where bulk ZnO powder is calcined at very high temperature of 1200 °C and then quenched into ice cold polyvinylpyrrolidone solution. The samples have been characterized by using UV/vis spectroscopy, X-ray diffraction study, high resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM). These studies infer the sizes of quantum dots to be within 10 nm. The prepared quantum dot samples have been tested for sensing acetone vapour by exploring the variation of their resistance with time at different operating temperatures. It has been revealed that ZnO quantum dots can sense acetone at low operating (230 °C) temperature with less response time.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2010.06.001