Apparatus for time‐resolved measurements of acoustic birefringence in particle dispersions

Mario Ettore Giardini; Ilaria Cristiani; Roberto Piazza; Vittorio Degiorgio

doi:10.1063/1.1146049

Apparatus for time‐resolved measurements of acoustic birefringence in particle dispersions

Mario Ettore Giardini, Ilaria Cristiani, Roberto Piazza, Vittorio Degiorgio

Biomedical Engineering

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Abstract

An apparatus for time‐resolved measurements of the birefringence induced in a particle suspension by an acoustic wave pulse is described. Efficient acoustic coupling is obtained by operating near the transducer resonant frequency and by matching the acoustic impedances of the cell constituents. An almost‐overdamped acoustic configuration can alternatively be employed whenever a faster response is needed. Careful design of the optical setup and of the detection unit minimize diffraction and stress‐birefringence parasitic effects and yields a good responsivity at fairly low acoustic intensities. A test of the apparatus on a colloidal suspension of PTFE rodlike particles is presented and discussed.

Original language	English
Pages (from-to)	1077-1082
Number of pages	6
Journal	Review of Scientific Instruments
Volume	66
DOIs	https://doi.org/10.1063/1.1146049
Publication status	Published - 1995

Keywords

time‐resolved measurements
apparatus
particle dispersions
acoustic birefringence

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10.1063/1.1146049

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http://rsi.aip.org/resource/1/rsinak/v66/i2/p1077_s1

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abstract = "An apparatus for time‐resolved measurements of the birefringence induced in a particle suspension by an acoustic wave pulse is described. Efficient acoustic coupling is obtained by operating near the transducer resonant frequency and by matching the acoustic impedances of the cell constituents. An almost‐overdamped acoustic configuration can alternatively be employed whenever a faster response is needed. Careful design of the optical setup and of the detection unit minimize diffraction and stress‐birefringence parasitic effects and yields a good responsivity at fairly low acoustic intensities. A test of the apparatus on a colloidal suspension of PTFE rodlike particles is presented and discussed.",

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year = "1995",

doi = "10.1063/1.1146049",

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T1 - Apparatus for time‐resolved measurements of acoustic birefringence in particle dispersions

AU - Giardini, Mario Ettore

AU - Cristiani, Ilaria

AU - Piazza, Roberto

AU - Degiorgio, Vittorio

PY - 1995

Y1 - 1995

N2 - An apparatus for time‐resolved measurements of the birefringence induced in a particle suspension by an acoustic wave pulse is described. Efficient acoustic coupling is obtained by operating near the transducer resonant frequency and by matching the acoustic impedances of the cell constituents. An almost‐overdamped acoustic configuration can alternatively be employed whenever a faster response is needed. Careful design of the optical setup and of the detection unit minimize diffraction and stress‐birefringence parasitic effects and yields a good responsivity at fairly low acoustic intensities. A test of the apparatus on a colloidal suspension of PTFE rodlike particles is presented and discussed.

AB - An apparatus for time‐resolved measurements of the birefringence induced in a particle suspension by an acoustic wave pulse is described. Efficient acoustic coupling is obtained by operating near the transducer resonant frequency and by matching the acoustic impedances of the cell constituents. An almost‐overdamped acoustic configuration can alternatively be employed whenever a faster response is needed. Careful design of the optical setup and of the detection unit minimize diffraction and stress‐birefringence parasitic effects and yields a good responsivity at fairly low acoustic intensities. A test of the apparatus on a colloidal suspension of PTFE rodlike particles is presented and discussed.

KW - time‐resolved measurements

KW - apparatus

KW - particle dispersions

KW - acoustic birefringence

UR - http://rsi.aip.org/resource/1/rsinak/v66/i2/p1077_s1

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DO - 10.1063/1.1146049

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VL - 66

SP - 1077

EP - 1082

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

ER -