Int. J. Mol. Sci. 2013, 14(11), 22826-22844; doi:10.3390/ijms141122826

Tuning Fluidic Resistance via Liquid Crystal Microfluidics

Received: 26 September 2013; in revised form: 4 November 2013 / Accepted: 8 November 2013 / Published: 19 November 2013
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Flow of molecularly ordered fluids, like liquid crystals, is inherently coupled with the average local orientation of the molecules, or the director. The anisotropic coupling—typically absent in isotropic fluids—bestows unique functionalities to the flowing matrix. In this work, we harness this anisotropy to pattern different pathways to tunable fluidic resistance within microfluidic devices. We use a nematic liquid crystalline material flowing in microchannels to demonstrate passive and active modulation of the flow resistance. While appropriate surface anchoring conditions—which imprint distinct fluidic resistances within microchannels under similar hydrodynamic parameters—act as passive cues, an external field, e.g., temperature, is used to actively modulate the flow resistance in the microfluidic device. We apply this simple concept to fabricate basic fluidic circuits, which can be hierarchically extended to create complex resistance networks, without any additional design or morphological patterning of the microchannels.
Keywords: microfluidics; liquid crystals; surface anchoring; flow resistance; flow circuits
PDF Full-text Download PDF Full-Text [2808 KB, Updated Version, uploaded 19 June 2014 05:16 CEST]
The original version is still available [1072 KB, uploaded 19 June 2014 05:16 CEST]

Export to BibTeX |

MDPI and ACS Style

Sengupta, A. Tuning Fluidic Resistance via Liquid Crystal Microfluidics. Int. J. Mol. Sci. 2013, 14, 22826-22844.

AMA Style

Sengupta A. Tuning Fluidic Resistance via Liquid Crystal Microfluidics. International Journal of Molecular Sciences. 2013; 14(11):22826-22844.

Chicago/Turabian Style

Sengupta, Anupam. 2013. "Tuning Fluidic Resistance via Liquid Crystal Microfluidics." Int. J. Mol. Sci. 14, no. 11: 22826-22844.

Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert