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Sensors 2017, 17(7), 1478; doi:10.3390/s17071478

Trimethylamine Sensors Based on Au-Modified Hierarchical Porous Single-Crystalline ZnO Nanosheets

1
College of Information Science and Engineering, Northeastern University, Shenyang 110819, China
2
Department of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, China
3
Nanomaterials and Environment Detection Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China
*
Author to whom correspondence should be addressed.
Received: 27 May 2017 / Revised: 20 June 2017 / Accepted: 21 June 2017 / Published: 22 June 2017
(This article belongs to the Section Chemical Sensors)
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Abstract

It is of great significance for dynamic monitoring of foods in storage or during the transportation process through on-line detecting trimethylamine (TMA). Here, TMA were sensitively detected by Au-modified hierarchical porous single-crystalline ZnO nanosheets (HPSCZNs)-based sensors. The HPSCZNs were synthesized through a one-pot wet-chemical method followed by an annealing treatment. Polyethyleneimine (PEI) was used to modify the surface of the HPSCZNs, and then the PEI-modified samples were mixed with Au nanoparticles (NPs) sol solution. Electrostatic interactions drive Au nanoparticles loading onto the surface of the HPSCZNs. The Au-modified HPSCZNs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectrum (EDS), respectively. The results show that Au-modified HPSCZNs-based sensors exhibit a high response to TMA. The linear range is from 10 to 300 ppb; while the detection limit is 10 ppb, which is the lowest value to our knowledge. View Full-Text
Keywords: Au modification; hierarchical porous single-crystalline; trimethylamine; highly sensitive; ZnO nanosheets Au modification; hierarchical porous single-crystalline; trimethylamine; highly sensitive; ZnO nanosheets
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Meng, F.; Zheng, H.; Sun, Y.; Li, M.; Liu, J. Trimethylamine Sensors Based on Au-Modified Hierarchical Porous Single-Crystalline ZnO Nanosheets. Sensors 2017, 17, 1478.

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