A simple, optically induced electrokinetic method to concentrate and pattern nanoparticles

Nanoscale
Stuart J WilliamsSteven T Wereley

Abstract

We demonstrate an optically induced electrokinetic technique that continuously concentrates nanoparticles on the surface of a parallel plate electrode that is biased with an AC signal. A highly focused beam of near-infrared light (1064 nm) was applied, inducing an electrothermal microfluidic vortex that carried nanoparticles to its center where they were accumulated. This technique was demonstrated with 49 nm and 100 nm fluorescent polystyrene particles and characterized as a function of applied AC frequency and voltage. With this technique the location and shape of colloidal concentration was reconfigured by controlling the optical landscape, yielding dynamic control of the aggregation. Colloidal concentration was demonstrated with a plain parallel plate electrode configuration without the need of photoconductive materials or complex microfabrication procedures.

References

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Oct 23, 2008·Lab on a Chip·Stuart J WilliamsSteven T Wereley
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Citations

May 24, 2011·Lab on a Chip·Aloke KumarSteven T Wereley
Oct 27, 2012·Lab on a Chip·Jae-Sung KwonSteven T Wereley
Jul 19, 2013·Biomicrofluidics·Aminuddin A KayaniKourosh Kalantar-Zadeh
Dec 3, 2011·Expert Review of Molecular Diagnostics·Aeraj Ul Haque, Aloke Kumar
Jan 15, 2013·Journal of Colloid and Interface Science·Vanessa Velasco, Stuart J Williams
Feb 20, 2016·Lab on a Chip·A MishraS T Wereley
Apr 18, 2013·Electrophoresis·Nicholas R WoodStuart J Williams
Apr 23, 2015·Soft Matter·Andrew H Work, Stuart J Williams
Jul 8, 2014·Trends in Biotechnology·Avanish MishraSteve Wereley
Oct 15, 2010·Lab on a Chip·Hyundoo Hwang, Je-Kyun Park
Feb 26, 2016·Scientific Reports·Po-Fu YangGwo-Bin Lee
Aug 10, 2019·Lab on a Chip·Ruhollah Habibi, Adrian Neild
May 22, 2019·Biotechnology and Bioengineering·Marsela JorgolliLes P Miranda
May 27, 2020·Nature Communications·Serena SeshadriMegan T Valentine
Mar 24, 2016·Microsystems & Nanoengineering·Avanish MishraSteven T Wereley
Mar 15, 2019·Biomicrofluidics·Golak KuntiSuman Chakraborty
Mar 18, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Aloke KumarSteven T Wereley
Mar 16, 2019·ACS Nano·Jingang LiYuebing Zheng

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