Quantifying heat transfer in DMD-based optoelectronic tweezers with infrared thermography

Peter J. Pauzauskie; Hsan-Yin Hsu; Arash Jamshidi; Justin K. Valley; Shao Ning Pei; Ming C. Wu

doi:10.1117/12.846247

10 February 2010 Quantifying heat transfer in DMD-based optoelectronic tweezers with infrared thermography

Peter J. Pauzauskie, Hsan-Yin Hsu, Arash Jamshidi, Justin K. Valley, Shao Ning Pei, Ming C. Wu

Proceedings Volume 7596, Emerging Digital Micromirror Device Based Systems and Applications II; 759609 (2010) https://doi.org/10.1117/12.846247
Event: SPIE MOEMS-MEMS, 2010, San Francisco, California, United States

Abstract

Optoelectronic tweezers (OET) have emerged in recent years as a powerful form of optically-induced dielectrophoresis for addressing single cells and trapping individual nanostructures with DMD-based virtual-electrodes. In this technique an alternating electric field is used to induce a dipole within structures of interest while very low-intensity optical images are used to produce local electric field gradients that create dynamic trapping potentials. Addressing living cells, particularly for heat-sensitive cell lines, with OET's optical virtual-electrodes requires an in-depth understanding of heating profiles within OET devices. In this work we present quantitative measurements of the thermal characteristics of single-crystalline-silicon phototransistor based optoelectronic tweezers (PhOET). Midwave infrared (3 - 5 micron) thermographic imaging is used to determine relative heating in PhOET devices both with and without DMD-based optical actuation. Temperature increases of approximately 2°C from electrolyte Joule-heating are observable in the absence of DMD-illumination when glass is used as a support for PhOET devices. An additional temperature increase of no more than 0.2°C is observed when DMD-illumination is used. Furthermore, significantly reduced heating can be achieved when devices are fabricated in direct contact with a metallic heat-sink.

Citation Download Citation

Peter J. Pauzauskie, Hsan-Yin Hsu, Arash Jamshidi, Justin K. Valley, Shao Ning Pei, and Ming C. Wu "Quantifying heat transfer in DMD-based optoelectronic tweezers with infrared thermography", Proc. SPIE 7596, Emerging Digital Micromirror Device Based Systems and Applications II, 759609 (10 February 2010); https://doi.org/10.1117/12.846247

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available