High-aspect ratio magnetic nanocomposite polymer cilium

M. Rahbar; H. Y. Tseng; B. L. Gray

doi:10.1117/12.2040662

6 March 2014 High-aspect ratio magnetic nanocomposite polymer cilium

M. Rahbar, H. Y. Tseng, B. L. Gray

Proceedings Volume 8976, Microfluidics, BioMEMS, and Medical Microsystems XII; 89760D (2014) https://doi.org/10.1117/12.2040662
Event: SPIE MOEMS-MEMS, 2014, San Francisco, California, United States

Abstract

This paper presents a new fabrication technique to achieve ultra high-aspect ratio artificial cilia micro-patterned from flexible highly magnetic rare earth nanoparticle-doped polymers. We have developed a simple, inexpensive and scalable fabrication method to create cilia structures that can be actuated by miniature electromagnets, that are suitable to be used for lab-on-a chip (LOC) and micro-total-analysis-system (μ-TAS) applications such as mixers and flow-control elements. The magnetic cilia are fabricated and magnetically polarized directly in microfluidic channels or reaction chambers, allowing for easy integration with complex microfluidic systems. These cilia structures can be combined on a single chip with other microfluidic components employing the same permanently magnetic nano-composite polymer (MNCP), such as valves or pumps. Rare earth permanent magnetic powder, (Nd_0.7Ce_0.3)_10.5Fe_83.9B_5.6, is used to dope polydimethylsiloxane (PDMS), resulting in a highly flexible M-NCP of much higher magnetization and remanence [1] than ferromagnetic polymers typically employed in magnetic microfluidics. Sacrificial poly(ethylene-glycol) (PEG) is used to mold the highly magnetic polymer into ultra high-aspect ratio artificial cilia. Cilia structures with aspect ratio exceeding 8:0.13 can be easily fabricated using this technique and are actuated using miniature electromagnets to achieve a high range of motion/vibration.

Citation Download Citation

M. Rahbar, H. Y. Tseng, and B. L. Gray "High-aspect ratio magnetic nanocomposite polymer cilium", Proc. SPIE 8976, Microfluidics, BioMEMS, and Medical Microsystems XII, 89760D (6 March 2014); https://doi.org/10.1117/12.2040662

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