Comparison of Fabrication Methods for Fiber‐Optic Ultrasound Transmitters Using Candle‐Soot Nanoparticles

Journal article


Bodian, S., Aytac‐Kipergil, E., Zhang, S., Lewis‐Thompson, I., Sathasivam, S., Mathews, S., Alles, E., Zhang, E., Beard, P., Gordon, Ross J., Collier, Paul, Parkin, I., Desjardins, A., Colchester, R. and Noimark, S. (2023). Comparison of Fabrication Methods for Fiber‐Optic Ultrasound Transmitters Using Candle‐Soot Nanoparticles. Advanced Materials Interfaces. 10 (9), p. 2201792. https://doi.org/10.1002/admi.202201792
AuthorsBodian, S., Aytac‐Kipergil, E., Zhang, S., Lewis‐Thompson, I., Sathasivam, S., Mathews, S., Alles, E., Zhang, E., Beard, P., Gordon, Ross J., Collier, Paul, Parkin, I., Desjardins, A., Colchester, R. and Noimark, S.
Abstract

Candle-soot nanoparticles (CSNPs) have shown great promise for fabricating optical ultrasound (OpUS) transmitters. They have a facile, inexpensive synthesis whilst their unique, porous structure enables a fast heat diffusion rate which aids high-frequency ultrasound generation necessary for high-resolution clinical imaging. These composites have demonstrated high ultrasound generation performance showing clinically relevant detail, when applied as macroscale OpUS transmitters comprising both concave and planar surfaces, however, less research has been invested into the translation of this material's technology to fabricate fiber-optic transmitters for image guidance of minimally invasive interventions. Here, are reported two fabrication methods of nanocomposites composed of CSNPs embedded within polydimethylsiloxane (PDMS) deposited onto fiber-optic end-faces using two different optimized fabrication methods: “All-in-One” and “Direct Deposition.” Both types of nanocomposite exhibit a smooth, black domed structure with a maximum dome thickness of 50 µm, broadband optical absorption (>98% between 500 and 1400 nm) and both nanocomposites generated high peak-to-peak ultrasound pressures (>3 MPa) and wide bandwidths (>29 MHz). Further, high-resolution (<40 µm axial resolution) B-mode ultrasound imaging of ex vivo lamb brain tissue demonstrating how CSNP-PDMS OpUS transmitters can allow for high fidelity minimally invasive imaging of biological tissues is demonstrated.

KeywordsMechanical Engineering; Mechanics of Materials
Year2023
JournalAdvanced Materials Interfaces
Journal citation10 (9), p. 2201792
PublisherWiley
ISSN2196-7350
Digital Object Identifier (DOI)https://doi.org/10.1002/admi.202201792
Publication dates
Online24 Feb 2023
Publication process dates
Deposited27 Mar 2023
Publisher's version
License
File Access Level
Open
Licensehttp://creativecommons.org/licenses/by/4.0/
Page range2201792
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https://openresearch.lsbu.ac.uk/item/9365v

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