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For the sensitive and convenient detection of pesticides, several sensing methods and materials have been widely explored. However, it is still a challenge to obtain sensitive, simple detection techniques for pesticides. Here, the simple and sensitive Time-resolved SERS mapping (T-SERS) and Spatial-resolved SERS mapping (S-SERS) are presented for detection of pesticides by using Au@Ag NPs as SERS...
Time-resolved dynamic-SERS (D-SERS) can observe the process of chemical reaction between target and substrate and changes of adsorptive forms for analytes. In this paper, the vibrational spectra of pesticide thiram adsorbed on Au nanoparticles and intensity alternation of SERS spectra depended on different laser powers have been systematically investigated using the method of D-SERS. The Raman intensities...
A sensitive surface–enhanced Raman scattering (SERS) probe for selective detection of Hg(II) was designed and prepared by incorporating the well-known Rhodamine 6G and ethylenediamine into one molecule which is a aminated ring-close structure of Rhodamine 6G (R-NH 2 ). Due to the presence of oxygen and nitrogen functional groups of R-NH 2 , Hg(II) would combined with two R-NH 2...
A coral-like SnO 2 nanostructure densely-modified with TiO 2 nanoparticles was reported for developing a self-cleaning gas sensor. The density of the TiO 2 nanoparticles in the TiO 2 /SnO 2 nanocomposites can be greatly improved via a plasma-based modification (PM) on SnO 2 /carbonaceous precursors before introducing Ti sources. In gas-sensing measurements,...
Persistent organic pollutants (POPs) are greatly noxious chemicals in environment, and they can cumulate in organisms and transfer between different species. Therefore, it is significant to detect POPs for both environmental evaluation and further treatment. However, developing facile approach for the detection of POPs still remains a challenge so far. In this paper, we report an innovative method...
Qualitative and quantitative analysis of organophosphorus pesticide residues (acephate and trichlorphon) using temperature modulated SnO 2 gas sensor were studied. The testing method employed only a single SnO 2 -based gas sensor in a rectangular temperature mode to perform the qualitative analysis of pure pesticide vapor and a binary vapor mixture in the air. Experimental results...
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