Guided Assembly of Gold Colloidal Nanoparticles on Silicon Substrates Prepatterned by Charged Particle Beams

Citations Over TimeTop 15% of 2012 papers

Abstract

Colloidal gold nanoparticles represent technological building blocks which are easy to fabricate while keeping full control of their shape and dimensions. Here, we report on a simple two-step maskless process to assemble gold nanoparticles from a water colloidal solution at specific sites of a silicon surface. First, the silicon substrate covered by native oxide is exposed to a charged particle beam (ions or electrons) and then immersed in a HF-modified solution of colloidal nanoparticles. The irradiation of the native oxide layer by a low-fluence charged particle beam causes changes in the type of surface-terminating groups, while the large fluences induce even more profound modification of surface composition. Hence, by a proper selection of the initial substrate termination, solution pH, and beam fluence, either positive or negative deposition of the colloidal nanoparticles can be achieved.

Related Papers

• → Surface functionalization of microporous carbon fibers by vapor phase methods for CO2 capture(2023)3 cited
• → Selective external surface functionalization of large-pore silica materials capable of protein loading(2016)24 cited
• → Thermal Functionalization of GaN Surfaces with 1-Alkenes(2013)13 cited
• Fluence and absorbed dose in high energy electron beams.(1983)
• → Blue-light-induced shift of the phototropic fluence-response curve in Pilobolus sporangiophores(1989)8 cited