NDLI: Calibration of sound forces in acoustic traps

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IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control - Front cover

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Introduction to the Special Issue on the Joint Meeting of 12th International Meeting on Ferroelectricity and 18th IEEE International Symposium on Applications of Ferroelectrics

Analysis of polarization behavior in relaxation of BaTiO₃-based ferroelectrics using wideband dielectric spectroscopy

Ferroelectric 180° a-a nanostripe and nanoneedle domains in thin BaTiO₃ films prepared with focused-ion beam

Improved photoluminescence and ferroelectric properties of (Bi_3.6Eu_0.4)Ti₃O₁₂ thin films via Li⁺ doping

Relaxor-PT single crystals: observations and developments

Magnetic field-induced strain and magnetoelectric effects in sandwich composite of ferromagnetic shape memory Ni-Mn-Ga crystal and piezoelectric PVDF polymer

Pyroelectric performances of rhombohedral 0.42Pb(In_1/2Nb_1/2)O₃-0.3Pb(Mg_1/3Nb_2/3)O₃-0.28PbTiO₃ single crystals

Interpretation of T_m and T^* in Relaxor Ferroelectric 0.93Pb(Zn_1/3Nb_2/3)O₃-0.07PbTiO₃

Lead-free piezoelectric ceramics and thin films

Structural, dielectric, and ferroelectric properties of the (1ߝx)PbTiO₃-xBiAlO₃ solid solution

Ultrafast crystallization kinetics in (Pb,La)(Zr_0.30Ti_0.70)O₃ thin films by pulsed excimer laser annealing

Study of the integrated growth of dielectric films on GaN semiconductor substrates

Dielectric properties of (Ba,Sr)TiO₃ thin films with varied microstructures prepared by the chemical solution deposition method for thin-film capacitors and ferroelectric varactors

High-performance PMNߝPT thick films

Micro-machined high-frequency (80 MHz) PZT thick film linear arrays

Comparison of BST film microwave tunable devices based on (100) and (111) MgO substrates

Multiferroic and magnetoelectric materialsߞnovel developments and perspectives

Defect control for polarization switching in BiFeO₃ single crystals

Novel room temperature multiferroics for random access memory elements

Intrinsic microwave dielectric loss of lanthanum aluminate

Dielectric properties of rutile structure (Zn_1/3B_2/3)_x(Ti_ySn_1ߝy)_1ߝxO₂ (B=Nb⁵⁺,Ta⁵⁺) at microwave frequencies

A control theory approach to clock steering techniques

4-D x 3-D ultrasound: real-time scan conversion, filtering, and display of displacement vectors with a motorized curvilinear transducer

Anechoic sphere phantoms for estimating 3-D resolution of very-high-frequency ultrasound scanners

Quantitative measurements of apoptotic cell properties using acoustic microscopy

Calibration of sound forces in acoustic traps

Minimum variance ultrasonic imaging applied to an in situ sparse guided wave array

Separation of overlapping linear frequency modulated (LFM) signals using the fractional fourier transform

Stator design of a new type of spherical piezoelectric motor

Cellular polypropylene polymer foam as air-coupled ultrasonic transducer materials

Usage of symmetry in the simulation of interdigital transducers

A rotary ultrasonic motor using bending vibration transducers

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Calibration of sound forces in acoustic traps

Content Provider	IEEE Xplore Digital Library
Author	Jungwoo Lee Changyang Lee Shung, K.K.
Copyright Year	1986
Abstract	A two-dimensional or transverse acoustic trapping and its capability to noninvasively manipulate micrometersized particles with focused sound beams were experimentally demonstrated in our previous work. To apply this technique, as in optical tweezers, for studying mechanical properties of and interactions among biological particles such as cells, the trapping forces must be calibrated against known forces, i.e., viscous drag forces exerted by fluid flows. The trapping forces and the trap stiffness were measured under various conditions and the results were reported in this paper. In the current experimental arrangement, because the trapped particles were positioned against an acoustically transparent mylar membrane, the ultrasound beam intensity distribution near the membrane must be carefully considered. The total intensity field (the sum of incident and scattering intensity fields) around the droplet was thus computed by finite element analysis (FEA) with the membrane included, and it was then used in the ray acoustics model to calculate the trapping forces. The membrane effect on trapping forces was discussed by comparing effective beam widths with and without the membrane. The FEA results found that the broader beam width, caused by the scattered beams from the neighboring membrane and the droplet, resulted in the lower intensity, or smaller force, on the droplet. The experimental results showed that the measured forces were as high as 64 nN. The trap stiffness, approximated as a linear spring, was estimated by linear regressions and found to be 1.3 to 4.4 nN/μm, which was on a larger scale than that of optical trapping estimated for red blood cells, a few tenths of piconewtons/nanometer. The experimental and theoretical results were in good agreement.
File Size	743231
File Format	PDF
ISSN	08853010
Volume Number	57
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Charge carrier processes Acoustics Acoustic beams Force Biomembranes Artificial neural networks Force measurement
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Instrumentation Electrical and Electronic Engineering

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