Growth and Transfer of Monolithic Horizontal ZnO Nanowire Superstructures onto Flexible Substrates

Abstract

A method of fabricating horizontally aligned ZnO nanowire (NW) arrays with full control over the width and length is demonstrated. A cross‐sectional view of the NWs by transmission electron microscopy shows a “mushroom‐like” structure. Novel monolithic multisegment superstructures are fabricated by making use of the lateral overgrowth. Ultralong horizontal ZnO NWs of an aspect ratio on the order of ten thousand are also demonstrated. These horizontal NWs are lifted off and transferred onto a flexible polymer substrate, which may have many great applications in horizontal ZnO NW‐based nanosensor arrays, light‐emitting diodes, optical gratings, integrated circuit interconnects, and high‐output‐power alternating‐current nanogenerators.

Carbon Transition‐metal Oxide Electrodes: Understanding the Role of Surface Engineering for High Energy Density Supercapacitors

“…The minimization of surface energy drives the growth of nanostructures under hydro/solvothermal conditions. [44,47] Hence, TMOs grow in the direction that exposes low energy surfaces such as non-polar facets. However, this situation can be changed by using polar solvents that interact with the polar facet and hinder the adsorption of incoming precursor on the TMO nucleus.…”

Carbon Transition‐metal Oxide Electrodes: Understanding the Role of Surface Engineering for High Energy Density Supercapacitors

“…The minimization of surface energy drives the growth of nanostructures under hydro/solvothermal conditions. [44,47] Hence, TMOs grow in the direction that exposes low energy surfaces such as non-polar facets. However, this situation can be changed by using polar solvents that interact with the polar facet and hinder the adsorption of incoming precursor on the TMO nucleus.…”

Double Role of HMTA in ZnO Nanorods Grown by Chemical Bath Deposition

“…The seed layer, which consists of zinc oxide crystallites preformed or spin-coated on the substrate,[25][26][27] promotes the heterogeneous nucleation on the substrate (while the homogenous one typically occurs in the bulk solution). The fact that the anisotropic growth of these nanostructures is intrinsic to wet chemical methods and to wurtzite structure has found several experimental evidences 28,29. However, on the precise role of HMTA there is not a general consensus.…”

Single-crystal halide perovskites: Opportunities and challenges

“…Solution-based epitaxy allows the formation of stable interfacial chemical bonds for controllable and uniform epitaxial growth. 231 Compared with vapor-phase epitaxy, solution-based epitaxy can have a much higher growth coverage because of the uniform contact between the substrate and the growth precursor. Halide perovskite bulk crystals can be used as the substrate.…”

Carbon Transition‐metal Oxide Electrodes: Understanding the Role of Surface Engineering for High Energy Density Supercapacitors

“…The minimization of surface energy drives the growth of nanostructures under hydro/solvothermal conditions. [44,47] Hence, TMOs grow in the direction that exposes low energy surfaces such as non-polar facets. However, this situation can be changed by using polar solvents that interact with the polar facet and hinder the adsorption of incoming precursor on the TMO nucleus.…”

Double Role of HMTA in ZnO Nanorods Grown by Chemical Bath Deposition

“…The seed layer, which consists of zinc oxide crystallites preformed or spin-coated on the substrate,[25][26][27] promotes the heterogeneous nucleation on the substrate (while the homogenous one typically occurs in the bulk solution). The fact that the anisotropic growth of these nanostructures is intrinsic to wet chemical methods and to wurtzite structure has found several experimental evidences 28,29. However, on the precise role of HMTA there is not a general consensus.…”

Single-crystal halide perovskites: Opportunities and challenges

“…Solution-based epitaxy allows the formation of stable interfacial chemical bonds for controllable and uniform epitaxial growth. 231 Compared with vapor-phase epitaxy, solution-based epitaxy can have a much higher growth coverage because of the uniform contact between the substrate and the growth precursor. Halide perovskite bulk crystals can be used as the substrate.…”

Carbon Transition‐metal Oxide Electrodes: Understanding the Role of Surface Engineering for High Energy Density Supercapacitors

“…The minimization of surface energy drives the growth of nanostructures under hydro/solvothermal conditions. [44,47] Hence, TMOs grow in the direction that exposes low energy surfaces such as non-polar facets. However, this situation can be changed by using polar solvents that interact with the polar facet and hinder the adsorption of incoming precursor on the TMO nucleus.…”

Double Role of HMTA in ZnO Nanorods Grown by Chemical Bath Deposition

“…The seed layer, which consists of zinc oxide crystallites preformed or spin-coated on the substrate,[25][26][27] promotes the heterogeneous nucleation on the substrate (while the homogenous one typically occurs in the bulk solution). The fact that the anisotropic growth of these nanostructures is intrinsic to wet chemical methods and to wurtzite structure has found several experimental evidences 28,29. However, on the precise role of HMTA there is not a general consensus.…”

Single-crystal halide perovskites: Opportunities and challenges

“…Solution-based epitaxy allows the formation of stable interfacial chemical bonds for controllable and uniform epitaxial growth. 231 Compared with vapor-phase epitaxy, solution-based epitaxy can have a much higher growth coverage because of the uniform contact between the substrate and the growth precursor. Halide perovskite bulk crystals can be used as the substrate.…”