Jump to main content
Jump to site search

Issue 5, 2015
Previous Article Next Article

An optopneumatic piston for microfluidics

Author affiliations

Abstract

We demonstrate an optopneumatic piston based on glass capillaries, a mixture of PDMS–carbon nanopowder, silicone and mineral oil. The fabrication method is based on wire coating techniques and surface tension-driven instabilities, and allows for the assembly of several pistons from a single batch production. By coupling the photothermal response of the PDMS–carbon mixture with optical excitation via an optical fiber, we demonstrate that the piston can work either as a valve or as a reciprocal actuator. The death volume of the pistons was between 0.02 and 1.56 μL and the maximum working frequency was around 1 Hz. Analysis of the motion during the expansion/contraction of the piston shows that this machine can be described by a phenomenological equation analogous to the Kelvin–Voight model used in viscoelasticity, having elastic and viscous components.

Graphical abstract: An optopneumatic piston for microfluidics

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Nov 2014, accepted on 18 Dec 2014 and first published on 18 Dec 2014


Article type: Paper
DOI: 10.1039/C4LC01389A
Author version
available:
Download author version (PDF)
Citation: Lab Chip, 2015,15, 1335-1342

  •   Request permissions

    An optopneumatic piston for microfluidics

    J. R. Vélez-Cordero, M. G. P. Zúñiga and J. Hernández-Cordero, Lab Chip, 2015, 15, 1335
    DOI: 10.1039/C4LC01389A

Search articles by author

Spotlight

Advertisements