Fabrication of Ag–ZnO NRs SERS substrates for abamectin detection: the effect of Ag sputtering times and ZnO sol concentrations in seed layer preparation on SERS performance

Influence of Zinc Salt Concentration on Structured ZnO Composition and Morphology

“…The preferential orientation (002) confirmed the vertical growth of the ZnO hexagonal nanorods along the c‐axis perpendicular to the substrate. Similar (002) preferential orientation in ZnO nanorods have been reported by other authors [15–18] . However, samples prepared at larger concentration, 0.05, 0.1 and 0.15 M of ZnCl2‐HMT aqueous solution exhibit significantly different diffraction patterns than the sample prepared at low molarity 0.01 M, their pattern are composed of various peaks located at 2θ=11.5°, 23°, 34.5° and 46.5°, which are attributed to the (003), (1 0 4), (202) and (0012) diffraction planes respectively (ICSD No.…”

“…Similar (002) preferential orientation in ZnO nanorods have been reported by other authors. [15][16][17][18] However, samples prepared at larger concentra-tion, 0.05, 0.1 and 0.15 M of ZnCl2-HMT aqueous solution exhibit significantly different diffraction patterns than the sample prepared at low molarity 0.01 M, their pattern are composed of various peaks located at 2θ = 11.5°, 23°, 34.5°and 46.5°, which are attributed to the (003), (1 0 4), ( 202) and (0012) diffraction planes respectively (ICSD No. 77-2311) of the hexagonal simonkolleite (SK) phase owing the formula Zn 5 (OH) 8 Cl 2 2H 2 O..…”

Ag nanoparticles on ZnO nanoplates as a hybrid SERS-active substrate for trace detection of methylene blue

“…It allows one to understand the adsorptive behavior of the probe molecules on the nanostructured surface. 12 Recent studies show that SERS is an ultra-sensitive vibrational spectroscopy in the field of food safety, capable of detecting pesticide residues, 13 abamectin, 14 malachite green, 10 DNA, 15 melamine, 16 podamine, 4 methylene blue, 7 etc. with high sensitivity and excellent selectivity.…”

“…Koleva and colleagues prepared Ag/ZnO nanocomposites to measure the ammonium nitrate concentration. 20 The combination of ZnO nanostructures and metal, such as ZnO nanorods/Ag nanoparticles, 14–16,28 Ga-doped ZnO nanoparticles, 35 ZnO nanoplates/Ag nanoparticles, 49 ZnO nanorods/Au nanoislands were excellent SERS-active substrates for detecting various molecule probes, such as 4-aminothiophenol, DNA, melamine, phenformin, abamectin, 4-mercaptobenzoic acid, Rhodamine 6G, and methylene blue, respectively. Recently, the system of La-doped ZnO nanoparticles was investigated in an application to degrade methyl orange under visible light.…”