Growth modes of ZnO nanostructures from laser ablation

Abstract

ZnO nanowires (NWs) and other nanostructures were grown by laser ablation of a ZnO containing target onto different substrates with and without the presence of an Au catalyst. The morphology and structure of the NWs were studied using high resolution scanning and transmission electron microscopes [including imaging, selected area electron diffraction (SAED), and energy dispersive x-ray spectroscopy (EDS)]. The different growth modes obtainable could be tuned by varying the Zn concentration in the vapor phase keeping other growth parameters intact. Possible growth mechanisms of these nanowires are suggested and discussed.

Carbothermal synthesis of metal-functionalized nanostructures for energy and environmental applications

“…At such high ow rates, the vapor concentration is low enough to facilitate catalyst-assisted growth. 52 Fig. 8 (upstream conguration) and Fig.…”

Cell-biological effects of zinc oxide spheres and rods from the nano- to the microscale at sub-toxic levels

“…Apart from their unintended presence in the workplace and the environment, zinc oxide particles have many applications in biomedical materials technology, nanomedicine, health care, and consumer products, where the particle parameters play the key role with respect to their physicochemical and biological properties (Ann et al 2015 ; Cheng et al 2013 ). There are different synthetic methods for the preparation of ZnO particles with defined properties, including chemical vapor deposition, sol-gel syntheses, hydrothermal synthesis, and precipitation methods (Amarilio-Burshtein et al 2010 ; Dejene et al 2011 ). Different strategies for the synthesis of ZnO particles in the microscale were reported, but only a few permit the synthesis of monodisperse ZnO particles of different shape in the size range between 50 and 500 nm in a well-dispersed, colloidally stable form (Eskandari et al 2009 ; Nagvenkar et al 2016 ).…”

A Facile Approach for the Preparation of Nano-size Zinc Oxide in Water/Glycerol with Extremely Concentrated Zinc Sources

“…Many methods have been developed to synthesize ZnO nanoparticles with different sizes and morphologies, including chemical vapor deposition [ 11 ], sol-gel methods [ 12 ], hydrothermal methods [ 13 ], laser ablation [ 14 ], microemulsion techniques [ 15 ], and others [ 16 ]. Due to their large specific surface areas as well as high surface energies, ZnO nanoparticles tend to agglomerate easily.…”