Templated electrodeposition as a scalable and surfactant-free approach to the synthesis of Au nanoparticles with tunable aspect ratios

Abstract

A high-throughput method for the fabrication of ordered arrays of Au nanoparticles is presented. It is based on pulsed electrodeposition into porous anodic alumina templates. In contrast to many synthesis...

Surfactant-free synthesis of metal and metal oxide nanomaterials: a perspective

“…5). 84 Compared to colloidal fabrication approaches, the electrochemical synthesis technique can be applied for manufacturing NPs without surfactants or capping agents to stabilize their sizes and morphologies, paving the way to construct NPs as catalysts without restrictions in their reactive surface sites; this method can also be applied for synthesizing NPs with a controllable inter-pore distance. However, the limitation of this technique was its low yield of production, and future explorations ought to be focused on its up-scalability along with optimization conditions.…”

“…However, the limitation of this technique was its low yield of production, and future explorations ought to be focused on its up-scalability along with optimization conditions. 84 It was revealed that the particle size can be controlled by adjusting the current density and the distance between electrodes. 43 In one study, the particle size of magnetite NPs increased by enhancing the current density and reducing the distance between electrodes; the particle formation could not be favored when the distance between electrodes was larger than a critical value.…”

“…Adapted from ref. 84 onto hydrothermally grown TiO 2 nanorods on uorine-doped tin oxide (SnO 2 ), providing enhanced photoelectrochemical activity for a water-splitting device due to the localized surface plasmon resonance effects in the Au NPs. As a result, these hybrid nanostars on TiO 2 nanorods displayed an excellent enhancement (∼33%) in photocurrent density compared to the pristine TiO 2 nanorods.…”

“…(B) TEM image of Au NPs produced using a templated and surfactant-free electrodeposition approach (time: 100 s). Adapted from ref 84. with permission.…”

Fractal-like gold nanonetworks formed by templated electrodeposition through 3D-mesoporous silica films

“…Specically, templated electrodeposition provides a versatile method to fabricate well-dened nanostructures. 17,18 Commercial tracketched polycarbonate membranes and porous anodic aluminium oxide membranes with vertical pore channels and >20 nm pore sizes are the most commonly used templates for electrodeposition. Silica thin lms have excellent insulation and thermal stability properties, and are widely used as a dielectric material.…”