Manipulation of gold nanoparticles: influence of surface chemistry, temperature, and environment (vacuum versus ambient atmosphere)

Langmuir : the ACS Journal of Surfaces and Colloids
K MouginE Meyer

Abstract

We have manipulated raw and functionalized gold nanoparticles (with a mean diameter of 25 nm) on silicon substrates with dynamic atomic force microscopy (AFM). Under ambient conditions, the particles stick to silicon until a critical amplitude is reached by the oscillations of the probing tip. Beyond that threshold, the particles start to follow different directions, depending on their geometry and adhesion to the substrate. Higher and lower mobility were observed when the gold particles were coated with methyl- and hydroxyl-terminated thiol groups, respectively, which suggests that the adhesion of the particles to the substrate is strongly reduced by the presence of hydrophobic interfaces. Under ultrahigh vacuum conditions, where the water layer is absent, the particles did not move, even when operating the atomic force microscope in contact mode. We have also investigated the influence of the temperature (up to 150 degrees C) and of the geometrical arrangement of the particles on the manipulation process. Whereas thermal activation has an important effect in enhancing the mobility of the particles, we did not find differences when manipulating ordered versus random distributions of particles.

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Citations

May 8, 2009·Physical Chemistry Chemical Physics : PCCP·Weilin XuPeng Chen
Apr 10, 2013·Journal of Colloid and Interface Science·Dave MaharajSumio Iijima
Oct 12, 2010·Colloids and Surfaces. B, Biointerfaces·Wen ZhangYongsheng Chen
Feb 23, 2013·Scientific Reports·Teemu HynninenClemens Barth
Aug 25, 2009·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·André Schirmeisen, Udo D Schwarz
Jan 22, 2011·Advanced Materials·Clemens BarthAlexander L Shluger
May 1, 2010·Nanotechnology·Enrico GneccoErnst Meyer
Jul 23, 2013·Nanotechnology·Paweł NitaEnrico Gnecco
Dec 6, 2012·Beilstein Journal of Nanotechnology·Dave Maharaj, Bharat Bhushan
Mar 8, 2014·Beilstein Journal of Nanotechnology·Boris PolyakovIlmar Kink
Jan 25, 2020·Beilstein Journal of Nanotechnology·Sven OrasKarine Mougin
May 3, 2014·Physical Review Letters·Michael FeldmannAndré Schirmeisen
May 27, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Masahiro OkadaTsutomu Furuzono
Jun 3, 2021·Nanomaterials·Mariam Abdulaziz M TarkistaniVeysel Kayser
Sep 29, 2020·Nano Letters·Nourin AlsharifKeith A Brown

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