TITLE

Surface acoustic wave mediated dielectrophoretic alignment of rolled-up microtubes in microfluidic systems

AUTHOR(S)
Kong, X. H.; Deneke, Ch.; Schmidt, H.; Thurmer, D. J.; Ji, H. X.; Bauer, M.; Schmidt, O. G.
PUB. DATE
March 2010
SOURCE
Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p134105
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The alignment behavior of solution dispersed rolled-up microtubes by surface acoustic waves (SAW) is demonstrated. In contrast to the random alignment of rolled-up insulated silicon oxide tubes, metallic chromium tubes can be effectively aligned and assembled into “tube-chains” parallel to the SAW propagation direction. The experiments suggest that the tube orientation is mainly determined by the dielectrophoresis (DEP) forces acting on the tubes. The DEP forces arise from the induced dipole moment of the tubes in the SAW generated piezoelectric field on the LiNbO3 substrate.
ACCESSION #
48943868

 

Related Articles

  • Rotational microfluidic motor for on-chip microcentrifugation. Shilton, Richie J.; Glass, Nick R.; Chan, Peggy; Yeo, Leslie Y.; Friend, James R. // Applied Physics Letters;6/20/2011, Vol. 98 Issue 25, p254103 

    We report on the design of a surface acoustic wave (SAW) driven fluid-coupled micromotor which runs at high rotational velocities. A pair of opposing SAWs generated on a lithium niobate substrate are each obliquely passed into either side of a fluid drop to drive rotation of the fluid, and the...

  • Surface ferromagnetism in hydrogenated-ZnO film. Li, T.; Ong, C. S.; Herng, T. S.; Yi, J. B.; Bao, N. N.; Xue, J. M.; Feng, Y. P.; Ding, J. // Applied Physics Letters;4/11/2011, Vol. 98 Issue 15, p152505 

    Nonmagnetic ZnO films were found to exhibit room temperature ferromagnetism after hydrogen annealing at elevated temperatures (100-500 °C), accompanied by (OH) bonds detection. The areal saturation magnetization Ms (∼1.1×10-5 emu cm-2) was insensitive to film thickness, suggesting...

  • Microfluidic pumps employing surface acoustic waves generated in ZnO thin films. Du, X. Y.; Fu, Y. Q.; Luo, J. K.; Flewitt, A. J.; Milne, W. I. // Journal of Applied Physics;Jan2009, Vol. 105 Issue 2, pN.PAG 

    ZnO thin film based surface acoustic wave (SAW) devices have been utilized to fabricate microfluidic pumps. The SAW devices were fabricated on nanocrystalline ZnO piezoelectric thin films deposited on Si substrates using rf magnetron sputtering and use a Sezawa wave mode for effective droplet...

  • Simulations of surface acoustic wave devices built on stratified media using a mixed finite element/boundary integral formulation. Ballandras, S.; Reinhardt, A.; Laude, V.; Soufyane, A.; Camou, S.; Daniau, W.; Pastureaud, T.; Steichen, W.; Lardat, R.; Solal, M.; Ventura, P. // Journal of Applied Physics;12/15/2004, Vol. 96 Issue 12, p7731 

    The demand for high frequency surface acoustic wave devices for modern telecommunication applications imposes the development of devices able to answer the manufacturer requirements. The use of high velocity substrates for which a piezoelectric layer is required to excite and detect surface...

  • MONITORING OF PHYSICO-CHEMICAL PROCESSES BY SAW. Giriūnienė, Ramutė; Vežauskas, Donatas // International Conference: Radiation Interaction with Material & ;2008, p214 

    Surface acoustic wave (SAW) in pulse mode present a very effective tool for monitoring catalytic and sorption processes on the catalyst surface and in the electrolyte itself. It allows determining a nature and limited stage of the reaction. The change of acoustoelectric parameters reflects the...

  • Acousto-optic surface-plasmon resonance measurements of thin films on gold. Jory, Michael J.; Caruso, Frank; Bradberry, Geoffrey W.; Sambles, J. Roy; Furlong, D. Neil // Journal of Applied Physics;1/15/1998, Vol. 83 Issue 2, p1023 

    Examines the optical technique of acousto-optic surface resonance measurement of thin films on gold from water, in situ and in real-time. Examination of the purification techniques used on mondisperse octaethylene glycol mondodecyl ether; Information on the change in normalized reflectivity;...

  • Acoustic waves extend exciton lifetimes. Lewotsky, Kristin // Laser Focus World;Jul97, Vol. 33 Issue 7, p48 

    Reports on the splitting of optical excitons achieved by researchers of the University of Munich. Use of elliptically polarized surface acoustic waves (SAW); Propagation of electron-hole pairs at the speed of sound prior to photoluminescence; Potential in selection of optical storage time by...

  • Paratellurite: Propagation of the slow shear wave in the (001) plane. New formulations for the... Kastelik, J.C.; Gharbi, M.; Gazalet, M.G. // Journal of Applied Physics;7/15/1998, Vol. 84 Issue 2, p671 

    Proposes a novel formulation for the acoustic velocity and the acoustic divergence of the slow shear wave, in paratellurite with an angular deviation. Information on the magnitude of the acoustic phase velocity in acoustically anisotropic materials; Reference to the power flow angle alpha...

  • Synthesis and Analysis of SAW Dispersive Ladder Transducers by the Modified Method of Coupled Modes. Dmitriev, V. F. // Technical Physics;Sep2002, Vol. 47 Issue 9, p1158 

    A method for the synthesis and analysis of SAW filters and delay lines that use dispersive ladder interdigital transducers is described. A method for designing SAW devices that relies on modified equations for coupled waves is proposed. A singular integral equation for the surface current...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics