Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction

Ran Yoo; Somi Yoo; Dongmei Lee; Jeongmin Kim; Sungmee Cho; Wooyoung Lee

doi:10.1016/j.snb.2016.09.028

Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction

Ran Yoo, Somi Yoo, Dongmei Lee, Jeongmin Kim, Sungmee Cho, Wooyoung Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

51 Citations (Scopus)

Abstract

Here we report the fabrication of high surface area CuO nanoparticles (NPs) on micron-scale ZnO (CuO/ZnO) “flowers” with dimethyl methylphosphonate (DMMP) gas sensing capabilities. The formation of CuO NPs/ZnO heterojunction structures was confirmed by PXRD and TEM analyses. The gas sensing properties of the CuO NPs/ZnO structures showed a faster response time (26.2 s) compared to the exclusively ZnO-based sensor (330 s). The heterojunction sensors demonstrated the highest selectivity in 10 ppm DMMP, reaching the high value of 626.21 at 350 °C. This CuO NPs/ZnO heterojunction structure provides an extension of the depletion layer and an increase of the resistance (R_a) in air, leading to a reduction of the depletion layer and resistance (R_g) when exposed to reducing DMMP gas. The higher surface area (6.0 m²/g) of the CuO/ZnO heterojunction structure with a 0.5 h synthesis time of the ZnO flowers further promoted the adsorption kinetics for the reaction between C₃H₉O₃P and O²⁻ when exposed to DMMP, thus enhancing its sensing properties.

Original language	English
Pages (from-to)	1099-1105
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	240
DOIs	https://doi.org/10.1016/j.snb.2016.09.028
Publication status	Published - 2017 Mar 1

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/j.snb.2016.09.028

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title = "Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction",

abstract = "Here we report the fabrication of high surface area CuO nanoparticles (NPs) on micron-scale ZnO (CuO/ZnO) “flowers” with dimethyl methylphosphonate (DMMP) gas sensing capabilities. The formation of CuO NPs/ZnO heterojunction structures was confirmed by PXRD and TEM analyses. The gas sensing properties of the CuO NPs/ZnO structures showed a faster response time (26.2 s) compared to the exclusively ZnO-based sensor (330 s). The heterojunction sensors demonstrated the highest selectivity in 10 ppm DMMP, reaching the high value of 626.21 at 350 °C. This CuO NPs/ZnO heterojunction structure provides an extension of the depletion layer and an increase of the resistance (Ra) in air, leading to a reduction of the depletion layer and resistance (Rg) when exposed to reducing DMMP gas. The higher surface area (6.0 m2/g) of the CuO/ZnO heterojunction structure with a 0.5 h synthesis time of the ZnO flowers further promoted the adsorption kinetics for the reaction between C3H9O3P and O2− when exposed to DMMP, thus enhancing its sensing properties.",

author = "Ran Yoo and Somi Yoo and Dongmei Lee and Jeongmin Kim and Sungmee Cho and Wooyoung Lee",

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year = "2017",

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T1 - Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction

AU - Yoo, Ran

AU - Yoo, Somi

AU - Lee, Dongmei

AU - Kim, Jeongmin

AU - Cho, Sungmee

AU - Lee, Wooyoung

PY - 2017/3/1

Y1 - 2017/3/1

N2 - Here we report the fabrication of high surface area CuO nanoparticles (NPs) on micron-scale ZnO (CuO/ZnO) “flowers” with dimethyl methylphosphonate (DMMP) gas sensing capabilities. The formation of CuO NPs/ZnO heterojunction structures was confirmed by PXRD and TEM analyses. The gas sensing properties of the CuO NPs/ZnO structures showed a faster response time (26.2 s) compared to the exclusively ZnO-based sensor (330 s). The heterojunction sensors demonstrated the highest selectivity in 10 ppm DMMP, reaching the high value of 626.21 at 350 °C. This CuO NPs/ZnO heterojunction structure provides an extension of the depletion layer and an increase of the resistance (Ra) in air, leading to a reduction of the depletion layer and resistance (Rg) when exposed to reducing DMMP gas. The higher surface area (6.0 m2/g) of the CuO/ZnO heterojunction structure with a 0.5 h synthesis time of the ZnO flowers further promoted the adsorption kinetics for the reaction between C3H9O3P and O2− when exposed to DMMP, thus enhancing its sensing properties.

AB - Here we report the fabrication of high surface area CuO nanoparticles (NPs) on micron-scale ZnO (CuO/ZnO) “flowers” with dimethyl methylphosphonate (DMMP) gas sensing capabilities. The formation of CuO NPs/ZnO heterojunction structures was confirmed by PXRD and TEM analyses. The gas sensing properties of the CuO NPs/ZnO structures showed a faster response time (26.2 s) compared to the exclusively ZnO-based sensor (330 s). The heterojunction sensors demonstrated the highest selectivity in 10 ppm DMMP, reaching the high value of 626.21 at 350 °C. This CuO NPs/ZnO heterojunction structure provides an extension of the depletion layer and an increase of the resistance (Ra) in air, leading to a reduction of the depletion layer and resistance (Rg) when exposed to reducing DMMP gas. The higher surface area (6.0 m2/g) of the CuO/ZnO heterojunction structure with a 0.5 h synthesis time of the ZnO flowers further promoted the adsorption kinetics for the reaction between C3H9O3P and O2− when exposed to DMMP, thus enhancing its sensing properties.

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Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction

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