Optical and Bio-Sensing Characteristics of ZnO Nanotubes Grown by Hydrothermal Method

Abstract

ZnO nanostructures were fabricated on copper substrates by hydrothermal method at an optimized growth temperature of -95 degrees C. Structural properties were investigated by field emission scanning electron and transmission electron microscopy. Distinct morphologies were found to be formed at different growth times. The formation of nanotubes mainly involved the initial nucleation followed by the growth of nanorods at 95 degrees C, and then with the increase of dissolution time at room temperature, the preferential chemical dissolution of the metastable Zn-rich [0001] polar surfaces resulted in removing the atoms from the surfaces, thus leading to the thinning of the wall of the nanostructures. Completely hollow ZnO nanotubes could be obtained at a high dissolution time. The room temperature photoluminescence and optical absorption properties of ZnO nanotubes have been studied as a function of dissolution time. The efficacy of ZnO nanotubes for glucose sensing applications has been studied.

Fabrication of Hierarchical ZnO Enriched Fibrous PVA Membrane

“…Large efforts have been devoted to the synthesis, characterization, and device application of ZnO and ZnO/polymer hybrid nanostructures. [25][26][27][28][29][30][31][32] However, little attention has been paid to the fabrication of nanocomposite fibers having homogeneously covered surfaces by mono dispersal and controlled size of nanoparticles. [33][34][35][36][37][38][39][40][41][42] This paper throws light on a simple cost effective method to prepare the ZnO enriched fibers.…”

Shape controlled Sn doped ZnO nanostructures for tunable optical emission and transport properties

“…ZnO has the ability to form many configurations and exhibited wide range of morphologies such as nanowires, 4 nanorods, 6 nanotubes, 7 nanorings, 8 etc., which play an important part in governing the properties and applications of nanomaterials.…”

Microstructural Analysis and the Multicolor UV/Violet/Blue/Green/Yellow PL Observed from the Synthesized ZnO Nano-leaves and Nano-rods

“…In this regard, several efforts have been made with ZnO nanostructures due to surface effects, for its applications such as NW (nanowire) fieldeffect transistors, [5][6][7] NW-based light emitting diodes (LEDs), [8] gas sensors, [9,10] chemical sensors, [11,12] photodetectors, [13,14] optical switches, [15] second harmonic generators, [16] solar cells, [17,18] logic circuits, [19] and biosensors. [20,21] Recently, many studies have been directed on transparent conductive oxide (TCO) application. [22] For instance, doped ZnO belongs to the material class of transparent conductive oxides.…”