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Ultrawideband sub-pascal sensitivity piezopolymer detectors.

Alexey Kurnikov1, Anatoly Sanin2, Xose Luis Dean Ben3

  • 1Institute of Applied Physics named after A.V. Gaponov-Grekhov, Russian Academy of Sciences, 46 Ulyanov Str., Nizhny Novgorod 603950, Russia; University of Nizhny Novgorod, Department of Radiophysics, Gagarin Ave. 23, Nizhny Novgorod 603022, Russia.

Ultrasonics
|May 24, 2024
PubMed
Summary
This summary is machine-generated.

Damped piezopolymer detectors made from PVDF-TrFE offer superior sensitivity and ultrawide bandwidth for hybrid optoacoustic imaging. These novel detectors outperform traditional piezoceramics, enhancing ultrasound and optoacoustic imaging systems.

Keywords:
High sensitivityOptoacousticsSub-pascal pressureUltrasoundUltrasound measurementsUltrawideband detectors

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Area of Science:

  • Medical Imaging
  • Materials Science
  • Acoustics

Background:

  • Piezoelectric detectors are crucial for ultrasound and optoacoustic imaging.
  • Conventional piezoceramic detectors face limitations in balancing high sensitivity with ultrawide bandwidth.
  • Achieving both high sensitivity and ultrawide bandwidth is critical for optimal optoacoustic imaging performance.

Purpose of the Study:

  • To investigate damped piezopolymer detectors fabricated from PVDF-TrFE for hybrid optoacoustic imaging.
  • To evaluate the synergistic blend of broad bandwidth and superb sensitivity in these novel detectors.
  • To compare the performance of piezopolymer detectors against conventional piezoelectric analogues.

Main Methods:

  • Theoretical and empirical research on damped piezopolymer detectors.
  • Fabrication of PVDF-TrFE based piezopolymer detectors with varying thicknesses (120 µm and 20 µm).
  • Experimental evaluation of detector sensitivity and noise equivalent pressure (NEP) across different frequency bands.

Main Results:

  • Damped piezopolymer detectors demonstrate a synergistic blend of broad bandwidth and high sensitivity.
  • Experimental sensitivity reached 15.5 µV/Pa (1-10 MHz) for 120 µm and 6.4 µV/Pa (1-30 MHz) for 20 µm detectors.
  • Resultant noise equivalent pressures were 0.3 Pa (20 µm) and 1.2 Pa (120 µm), outperforming conventional piezoelectric detectors.

Conclusions:

  • Damped piezopolymer detectors represent a significant advancement for ultrawideband ultrasound and optoacoustic imaging.
  • PVDF-TrFE based detectors offer a superior alternative to conventional piezoceramics for demanding imaging applications.
  • These findings pave the way for enhanced efficacy and performance in hybrid imaging systems.