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ZnO Nanorods Grown on Heterogenous Ag Seed Layers for Single-Cell Fluorescence Bioassays
Author(s)
Muensri, Phitchaya
Treetong, Alongkot
Namdee, Katawut
Kasamechonchung, Panita
Wutikhun, Tuksadon
Sumranjit, Jitapa
Yordsri, Visittapong
Chayasombat, Bralee
Horprathum, Mati
Porntheeraphat, Supanit
Klamchuen, Annop
Date Issued
July 23, 2021
Type
Article
Abstract
Here we demonstrate the controllability of the morphology of hydrothermal ZnO nanorods (ZnO-NRs) grown on heterogenous Ag seed layers. By varying the crystal orientation of silver thin films (Ag), a high density of ZnO-NRs could be obtained. We find that the density of ZnO-NRs strongly relates to the peak intensity ratio between (111) and (200) planes of Ag thin films due to a heteroepitaxy between (0002) ZnO and (111) Ag rather than that of grain boundary nucleation and/or surface nucleation. In addition, the optimized heterostructure of ZnO nanorod/Ag arrays is investigated via a critical concentration for nucleation and used as a fluorescence enhancement substrate (FES). The experimental results have shown that the FES presents an ability to detect a biological sample (PC-3 cell) with a high sensitivity and low detection limit of 1 cell/μL. Our results highlight that understanding an important key to control and design the morphology of heterogeneous hydrothermal ZnO-NR growth is essential to open up the opportunities for fundamental studies and applications in high-performance integrated nanodevices.
Citation
ACS Applied Nano Materials, 4(7), 7384-7394, 2021