Application of ZnO Nanocrystals as a Surface-Enhancer FTIR for Glyphosate Detection

Nanomaterials

CleumarS. Moreira¹  Robinson Sabino-Silva²  GuedmillerS. Oliveira³  LucianoP. Rodrigues⁴  AnielleC. A. Silva⁵  NoelioO. Dantas⁵  LuizR. Goulart⁶  FrancielliC. C. Melo⁶  AndersonL. Valle⁶ 

[1] Electrical Engineering Department, Federal Institute of Paraíba, João Pessoa 58015-020, PB, Brazil;Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia 38402-022, MG, Brazil;Institute of Chemistry, Federal University of Uberlândia, Uberlândia 38402-022, MG, Brazil;Institute of Engineering, Science and Technology, Federal University of Jequitinhonha and Mucuri’s Valleys, Janaúba 39447-814, MG, Brazil;Laboratory of New Insulating and Semiconductors Materials, Institute of Physics, Federal University of Uberlândia, Uberlândia 38408-100, MG, Brazil;Nanobiotechnology Laboratory, Institute of Genetics and Biochemistry, Federal University of Uberlândia, Uberlândia 38402-022, MG, Brazil;

关键词: nanocrystals;    nanocomposites;    FTIR enhancement;    FTIR spectroscopy;    silver oxide;    zinc oxide;   

DOI  :  10.3390/nano11020509

来源: DOAJ

【 摘 要 】

Glyphosate detection and quantification is still a challenge. After an extensive review of the literature, we observed that Fourier transform infrared spectroscopy (FTIR) had practically not yet been used for detection or quantification. The interaction between zinc oxide (ZnO), silver oxide (Ag₂O), and Ag-doped ZnO nanocrystals (NCs), as well as that between nanocomposite (Ag-doped ZnO/AgO) and glyphosate was analyzed with FTIR to determine whether nanomaterials could be used as signal enhancers for glyphosates. The results were further supported with the use of atomic force microscopy (AFM) imaging. The glyphosate commercial solutions were intensified 10,000 times when incorporated the ZnO NCs. However, strong chemical interactions between Ag and glyphosate may suppress signaling, making FTIR identification difficult. In short, we have shown for the first time that ZnO NCs are exciting tools with the potential to be used as signal amplifiers of glyphosate, the use of which may be explored in terms of the detection of other molecules based on nanocrystal affinity.

【 授权许可】

Unknown