APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter UniPHY Group iResearch App Facebook

Applied Physics Letters / Volume 92 / Issue 10 / INTERDISCIPLINARY AND GENERAL PHYSICS

Appl. Phys. Lett. 92, 104103 (2008); http://dx.doi.org/10.1063/1.2889951 (3 pages)

Acoustic-counterflow microfluidics by surface acoustic waves

Marco Cecchini1,2, Salvatore Girardo3,4, Dario Pisignano3,4, Roberto Cingolani3,4, and Fabio Beltram1,2

1Scuola Normale Superiore and Italian Institute of Technology, I-56126 Pisa, Italy
2Scuola Normale Superiore and NEST-CNR-INFM, I-56126 Pisa, Italy
3National Nanotechnology Laboratory (NNL) of CNR-INFM, Università degli Studi del Salento, c/o Distretto Tecnologico ISUFI, via Arnesano, I-73100 Lecce, Italy
4Fondazione Istituto Italiano di Tecnologia (IIT), via Morego 30, I-16163 Genova, Italy

View MapView Map

(Received 10 October 2007; accepted 7 February 2008; published online 10 March 2008)

In this letter, we demonstrate an unexpected surface-acoustic-wave (SAW)-driven pumping effect in hydrophobic polydimethilsiloxane (PDMS)-lithium niobate (LiNbO3) microchannels. Atomization within the fluidic channel followed by SAW-assisted coalescence leads to liquid counterflow with respect to the SAW propagation direction. This physical mechanism is contrasted with the acoustic-streaming process driving isolated drop displacement on piezoelectric substrates. This principle is shown not to be readily applicable to the present microchannel case. The proposed device geometry can be exploited to integrate micropumps into complex microfluidic chips, improving the portability of micro-total-analysis systems.

© 2008 American Institute of Physics

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

acoustic streaming, microchannel flow, micropumps, organic compounds, piezoelectric materials, surface acoustic waves

PACS

  • 47.60.Dx

    Flows in ducts and channels

  • 68.35.Iv

    Acoustical properties

  • 77.65.Dq

    Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics

  • 77.84.Ek

    Niobates and tantalates

  • 77.84.Cg

    PZT ceramics and other titanates

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2889951

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    T. M. Squires and S. R. Quake, Rev. Mod. Phys. 77, 977 (2005).

    K. Sritharan, C. J. Strobl, M. F. Schneider, A. Wixforth, and Z. Guttenberg, Appl. Phys. Lett. 88, 054102 (2006)APPLAB000088000005054102000001.


For access to citing articles, you need to log in.


Figures (3)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Google Calendar

ADVERTISEMENT

Your Recent History Recent History Help

Recently Viewed

  1. Acoustic-counterflow microfluidics by surface acoustic waves
  2. Tuning coherent radiative thermal conductance in multilayer photonic crystals
  3. Anomalous microwave heating effects in Ce-doped La0.7Sr0.3MnO3: Possible role of grain boundary capacitative effects across cerium solubility limit
  4. Magnetic field induced transition from weak to strong ferromagnetic coupling in NiFe/Au/Co/Au multilayers
  5. Focal length modulation based on a metallic slit surrounded with grooves in curved depths
Go to AIP Home
Copyright © American Institute of Physics
close