When the dimensions of particles approach the nanoscale, either in one dimension for thin films, two dimensions fornanowires or three dimensions for nanoparticles, their physical properties can diverge from those of bulk materials due toquantum effects. There are many potential applications for devices based on these materials. However, it is a challenge tomanipulate nanoscale materials because of their ultra-small sizes. In this paper, optoelectronic tweezers (OET) are used totrap and manipulate microanoscale metal particles. Metal particles with scales from tens of microns to several nanometreswere successfully manipulated and nanoscale metal particles were assembled into tailored patterns. Due to the strongelectrical forces induced by the OET device, metal nanoparticles were deposited onto the surface of the amorphous silicon.After removing the liquid from the OET device, these nanoparticles were attached firmly on the sample surface throughVan der Waals forces which could lead to a method of producing solid-state electronic/optoelectronic devices.
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