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Thermoresponsive Hydrogel Microvalve Based on Magnetic Nanoheaters for Microfluidics

Published online by Cambridge University Press:  27 April 2011

Santaneel Ghosh ,
Arup Neogi ,
Chao Yang ,
Tong Cai ,
Somesree GhoshMitra ,
David Diercks  and
Zhibing Hu
Santaneel Ghosh
Affiliation:
Physics and Engineering Physics, Southeast Missouri State University, One University Plaza, MS 6600, Cape Girardeau, MO, 63701
Arup Neogi
Affiliation:
University of North Texas, Denton, TX, 76203
Chao Yang
Affiliation:
University of North Texas, Denton, TX, 76203
Tong Cai
Affiliation:
University of North Texas, Denton, TX, 76203
Somesree GhoshMitra
Affiliation:
Texas Woman's University, Denton, TX, 76201
David Diercks
Affiliation:
University of North Texas, Denton, TX, 76203
Zhibing Hu
Affiliation:
University of North Texas, Denton, TX, 76203
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Abstract

A novel magneto-active gel based nanomaterial system is presented as an externally tunable flow controller inside a microfluidic channel using the thermoresponsive property of the structure. Integration of ferromagnetic nanoparticles (Fe3O4) in the temperature sensitive polymer-poly (N-isopropylacrylamide) (PNIPAM) provides the swelling and de-swelling behavior of magnetic stimuli controlled micro-component by generating the heat due to the hysteresis loss of Fe3o4 under exposure in an alternating magnetic field. The shrinkage rates of the nanomaterial system at the bulk and micro scale are investigated. Size dependent shrinkage rate and actuation efficiency are ideal for various applications like magnetic micro/nano pump, magnetic field controlled drug delivery devices and magnetic switch applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1095: Symposium EE – Responsive Biomaterials for Biomedical Applications , 2008 , 1095-EE03-20
Copyright
Copyright © Materials Research Society 2008

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References

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