Formation and manipulation of two-dimensional arrays of micron-scale particles in microfluidic systems by surface acoustic waves

Wood, C. D.; Cunningham, J. E.; O'Rorke, R.; Wälti, C.; Linfield, E. H.; Davies, A. G.; Evans, S. D.
February 2009
Applied Physics Letters;2/2/2009, Vol. 94 Issue 5, pN.PAG
Academic Journal
The two-dimensional concentration and manipulation of micron-scale particles by orthogonal, surface acoustic, standing waves is demonstrated. The particles are organized by liquid pressure waves in a microfluidic system over a piezoelectric substrate and form a uniform two-dimensional array with a spacing governed by the mechanical nodes of the two orthogonal, surface acoustic, standing waves. The nodal spacing can be controlled in each orthogonal direction independently by adjustment of the radio frequency applied to the separate acoustic wave transducers. This technique could be used to enhance the particle concentrations at sensing locations in DNA or protein array detectors.


Related Articles

  • The particle valve: On-demand particle trapping, filtering, and release from a microfabricated polydimethylsiloxane membrane using surface acoustic waves. Collins, David J.; Alan, Tuncay; Neild, Adrian // Applied Physics Letters;7/21/2014, Vol. 105 Issue 3, p1 

    We introduce a surface acoustic wave (SAW) based method for acoustically controlled concentration, capture, release, and sorting of particles in a microfluidic system. This method is power efficient by the nature of its design: the vertical direction of a traveling acoustic wave, in which the...

  • Alignment of particles in microfluidic systems using standing surface acoustic waves. Wood, C. D.; Evans, S. D.; Cunningham, J. E.; O’Rorke, R.; Wälti, C.; Davies, A. G. // Applied Physics Letters;1/28/2008, Vol. 92 Issue 4, p044104 

    We report on the use of standing surface acoustic waves, formed on a single-crystal piezoelectric substrate, to organize micron-scale latex particles into an array comprising a series of lines in an adjacent microfluidic system. The lines of particles are formed parallel to the substrate surface...

  • Droplet Mobility Actuated by Surface Acoustic Wave. Yigui Li; Junfeng Zhang // Applied Mechanics & Materials;2014, Vol. 716-717, p1108 

    Droplet mobility actuated by surface acoustic wave (SAW) was demonstrated in this paper. On the surface of the LiNBO3 substrate, pairs of copper inter-digital transducer (IDT) were fabricated to generate Rayleigh wave at different radio frequency (RF) voltages. The various droplet motions, such...

  • Transverse surface acoustic wave detection by scanning acoustic force microscopy. Behme, G.; Hesjedal, T.; Chilla, E.; Fro¨hlich, H.-J. // Applied Physics Letters;8/17/1998, Vol. 73 Issue 7 

    We present a scanning acoustic force microscope (SAFM) for the study of surface acoustic wave (SAW) phenomena on the submicron lateral scale. Until now, SAWs with in-plane oscillation components could only be studied effectively via nonvanishing out-of-plane oscillation contributions. By...

  • X-ray standing waves effects for a multilayer mirror modulated by surface acoustic waves. Roshchupkin, D.V.; Tocoulou, R.; Brunel, M. // Applied Physics Letters;8/2/1999, Vol. 75 Issue 5, p639 

    Characterizes a multilayer mirror modulated by surface acoustic waves using the x-ray standing wave technique. Formation of fields of x-ray standing around the Bragg conditions upon sinusoidal modulation of a multilayer by surface acoustic waves; Determination of the angular position of the...

  • Interaction of laser-generated surface acoustic pulses with fine particles: Surface cleaning and... Kolomenskii, Al. A.; Schuessler, H.A.; Mikhalevich, V.G.; Maznev, A.A. // Journal of Applied Physics;9/1/1998, Vol. 84 Issue 5, p24 

    Focuses on a cleaning technique with laser-generated surface acoustic waves (SAWs) and the mechanism of particle detachment by SAWs. Description of research method utilized; Details on the use of laser-generated SAWs to clean surfaces; Influence of ambient conditions on the removal of particles.

  • Self-Aligned Interdigitated Transducers for Acoustofluidics. Zhichao Ma; Teo, Adrian J. T.; Say Hwa Tan; Ye Ai; Nam-Trung Nguyen // Micromachines;Dec2016, Vol. 7 Issue 12, p1 

    The surface acoustic wave (SAW) is effective for the manipulation of fluids and particles at microscale. The current approach of integrating interdigitated transducers (IDTs) for SAWgeneration into microfluidic channels involves complex and laborious microfabrication steps. These steps often...

  • ENSURE SUCCESS In SAW-Filter Choices.  // Microwaves & RF;Mar2013, Vol. 52 Issue 3, p84 

    The article focuses on simplification of radio frequency (RF) designs through correct specifications in surface-acoustic-wave (SAW) filters and also presents information on white paper "Specifying the Proper SAW Filter."

  • Sheathless Size-Based Acoustic Particle Separation. Guldiken, Rasim; Myeong Chan Jo; Gallant, Nathan D.; Demirci, Utkan; Jiang Zhe // Sensors (14248220);2012, Vol. 12 Issue 1, p905 

    Particle separation is of great interest in many biological and biomedical applications. Flow-based methods have been used to sort particles and cells. However, the main challenge with flow based particle separation systems is the need for a sheath flow for successful operation. Existence of the...


Read the Article


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

Try another library?
Sign out of this library

Other Topics