Open AccessHybrid Ag/ZnO nanostructures for SERS detection of ammonium nitrate
Author(s) -
M. Koleva,
N.N. Nedyalkov,
Ru Nikov,
Ru Nikov,
В. И. Нуждин,
В. Ф. Валеев,
A.M. Rogov,
А. Л. Степанов
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1492/1/012050
Subject(s) - materials science , nanostructure , surface plasmon resonance , nanocomposite , nanoparticle , annealing (glass) , plasmon , nanotechnology , laser , pulsed laser deposition , semiconductor , optoelectronics , chemical engineering , thin film , metallurgy , optics , physics , engineering
Ag/ZnO composite nanostructures are produced by combined laser and ion implantation techniques. The ZnO layers are grown on SiO 2 (001) and Al 2 O 3 (r-cut) substrates by pulsed laser deposition (PLD) in vacuum and in oxygen ambient using a third-harmonic Nd:YAG laser. The ion implantation allows the introduction of Ag nanoparticles (NPs) in the surface of the ZnO matrix. These NPs are incorporated into the ZnO matrices to fabricate metal-semiconductor nanocomposites with the aim of manipulating their functionalities, exploiting the characteristics of both the matrix and the metal NPs. The composite samples are modified by laser annealing at 355 nm and 532 nm. The changes are investigated in the plasmon resonance absorption of the nanostructures before and after the annealing. The influence is explored of the different substrates used and the deposition conditions of ZnO growth on the properties of Ag/ZnO. The nanostructures obtained are efficient as SERS substrates for detection of ammonium nitrate under laser excitation at 633 nm. The SERS enhancement is attributed to the synergistic interactions between the plasmonic coupling among the surface embedded AgNPs and the enhanced charge transfer properties of the ZnO.