Discovery - University of Dundee - Online Publications

Library & Learning Centre

Colloidal traffic in static and dynamic optical lattices

Colloidal traffic in static and dynamic optical lattices

Research output: Chapter in Book/Report/Conference proceedingConference contribution

View graph of relations

Authors

Research units

Info

Original languageEnglish
TitleOptical trapping and optical micromanipulation III
EditorsKishan Dholakia, Gabriel C. Spalding
Place of publicationBellingham, Wash.
PublisherSPIE-International Society for Optical Engineering
Publication date2006
PagesU667-U678
Number of pages12
ISBN (Print)0819464058
DOIs
StatePublished

Publication series

NameProceedings of SPIE--The International Society for Optical Engineering
PublisherSPIE
Number6326
ISSN (Print)0277-786X

Conference

ConferenceConference on Optical Trapping and Optical Micromanipulation III
CountryUnited States
CitySan Diego
Period13/08/0617/08/06

Abstract

Here, we present real-space studies of Brownian hard sphere transport though externally defined potential energy landscapes. Specifically, we examine how colloidal particles are re-routed as moderately dense suspensions pass through optical lattices, concentrating our attention upon the degree of sorting that occurs in multi-species flows. While methodologies reported elsewhere for microfluidic sorting of colloidal or biological matter employ active intervention to identify and selectively re-route particles one-by-one, the sorting described here is passive, with intrinsically parallel processing. In fact, the densities of co-flowing species examined here are sufficient to allow for significant many-body effects, which generally reduce the efficiencies of re-routing and sorting. We have studied four classes of transport phenomena, involving colloidal traffic within, respectively, a static lattice with a DC fluid flow, a continuously translating lattice with a DC fluid flow, a flashing lattice with AC fluid flow, and a flashing lattice with combined AC and DC fluid flow. We find that continuous lattice translation helps to reduce nearest neighbor particle distances, providing promise for efficiency improvements in future high throughput applications.
© (2006) COPYRIGHT SPIE--The International Society for Optical Engineering.

Documents

Library & Learning Centre

Contact | Accessibility | Policy