Abstract
Abstract Forming a monolayer of mixed nickel and gold nanoparticles through self-assembly via simple solution processing constitutes an important step toward inexpensive nanoparticle-based carbon nanofiber growth. In this work, mixed gold and nickel nanoparticles were anchored on the silicon wafer using self-assembled monolayers (SAMs) as a template. SAMs of 3-mercaptopropyl trimethoxysilane (MPTS-SAMs) were formed on silicon wafer, with the exposed thiol functionality providing ligand exchange sites to form the mixed monolayer of nickel and gold nanoparticles via a two-step sequential soaking approach. The densities of the nickel and gold nanoparticles on the surface can be varied by adjusting the soaking sequence.
Highlights
The nickel foils have been used to grow carbon microstructures since early 70s [1]
We describe a technique to form the mixed monolayer of nickel and gold nanoparticles on the surface of silicon wafer through self-assembly
The goal of this paper is to study how to form the spaced nickel nanoparticles through self-assembly and simple solution processing, which constitutes an important step toward inexpensive nanoparticle-based carbon nanofiber growth
Summary
The nickel foils have been used to grow carbon microstructures since early 70s [1]. Compared with that of gold nanoparticles, the mixed nickel and gold nanoparticles have different activity towards the C atoms during the growth of the carbon nanotube. We describe a technique to form the mixed monolayer of nickel and gold nanoparticles on the surface of silicon wafer through self-assembly. As the gold nanoparticles constitute the vast majority of the particles, the nickel nanoparticles are spaced apart from each other. Nickel nanoparticles can be used as the catalyst to grow the carbon nanofiber. The goal of this paper is to study how to form the spaced nickel nanoparticles through self-assembly and simple solution processing, which constitutes an important step toward inexpensive nanoparticle-based carbon nanofiber growth
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