Controlled growth of 1D and 2D ZnO nanostructures on 4H-SiC using Au catalyst

Abstract

A perfect control of nanostructure growth is a prerequisite for the development of electronic and optoelectronic device/systems. In this article, we demonstrate the growth of various ZnO-derived nanostructures, including well-ordered arrays of high aspect ratio single crystalline nanowires with preferred growth direction along the [0001] axis, nanowalls, and hybrid nanowire-nanowall structures. The growths of the various ZnO nanostructures have been carried out on SiC substrates in a horizontal furnace, using Au thin film as catalyst. From experimental observations, we have ascribed the growth mechanisms of the different ZnO nanostructures to be a combination of catalytic-assisted and non-catalytic-assisted vapor–liquid-solid (VLS) processes. We have also found that the different ZnO nanoarchitectures' material evolution is governed by a Zn cluster drift effects on the SiC surface mainly driven by growth temperature. Au thin film thickness, growth time, and temperature are the parameters to optimize in order to obtain the different ZnO nanoarchitectures.

Photoluminescence Study of the Influence of Additive Ammonium Hydroxide in Hydrothermally Grown ZnO Nanowires

“…Different bottom-up growth techniques, including flame transport approach [ 20 – 23 ], vapor-liquid-solid (VLS) [ 24 ], electrochemical deposition [ 25 ], and hydrothermal and/or chemical bath deposition [ 16 , 26 – 29 ] have been utilized for the synthesis of 1D ZnO NWs. Nevertheless, most of the techniques are limited by their high-temperature process that cannot be scaled up over large device area at very low cost, on plastic substrates for example.…”

Synthesis of Zinc Oxide Nanowire-Nanowall-Like Hybrid Structures on Graphene

“…These structures may be useful in many applications such as in energy storage or memory devices. In this regard, the growth of ZnO nanowires at the junction of nanowalls on various substrates (SiC, graphite, sapphire) by using Au catalyst have been reported in a literature review [17][18][19][20][21][22][23][24][25]. In this regard, this work shows how ZnO has been growing vertically well-aligned 1D and 2D semiconducting nanostructure on 2D graphene.…”

“…The two dimensional nanostructure of zinc oxide (2D-ZnO) including nanosheets and nanowalls have extremely high surface-to-volume ratio. It has the potential for application in optoelectronics, energy storage, solar cells and so forth [12][13][14][15][16][17][18][19][20]. Recently, much attention has been on ZnO low dimensional structures such as nanowires (1D) and nanowallls (2D) nanostructures, which can be grown into a three dimensional (3D) architectures [21][22][23][24][25][26][27][28][29][30][31].…”

Fabrication and characterization of ZnMgO nanowalls grown on 4H-SiC by molecular beam epitaxy

“…Many research groups grow ZnO nanostructures (nanowires, nanowalls) using Au catalysts (Dahiya et al, 2014;Mai et al, 2008). In this paper, we grow nanowalls directly on the clean SiC surface without buffer or catalyst.…”