Optical Manipulation of Nanoparticles’ Flow through Porous Membranes

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/179189
Download file(s):
There are no files associated with this item.
Type: Examensarbete för masterexamen
Master Thesis
Title: Optical Manipulation of Nanoparticles’ Flow through Porous Membranes
Authors: Mapar, Mokhtar
Abstract: By invention of laser as a high-intensity narrow-band light source and pioneering works of Ashkin, the optical tweezers emerged as a versatile tool for manipulating biological samples and mirco/nano-scale objects. Since then the optical forces have been a mean to trap, levitate and push particles or measure the forces at piconewton scale. To get to this point, many researches have been conducted to study the optical forces and optimize the trapping conditions for different particle sizes and materials. Nevertheless the effect of optical forces on the flow of particles has not been addressed before. The purpose of this thesis is to investigate the effect of light on the flow of nanoparticles. The work includes some nanofabri-cation and silicon work to create a porous membrane using colloidal lithography. PDMS soft lithography has been assisted to form a microfluidic backbone for the silicon device, responsible for delivering colloidal solution to the fabricated membrane and controlling the flow. Then the effect of light has been investigated by studying the flow of nanoparticles through the porous membrane in presence of a converging laser beam in darkfield microscopy setup. The general trend in the experimental results has been postulated by analytical solutions and simulations.
Keywords: Fysik;Physical Sciences
Issue Date: 2011
Publisher: Chalmers tekniska högskola / Institutionen för teknisk fysik
Chalmers University of Technology / Department of Applied Physics
URI: https://hdl.handle.net/20.500.12380/179189
Collection:Examensarbeten för masterexamen // Master Theses

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.