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Home > Press > Laser-based ultrasound approach provides new direction for nondestructive testing: Patches coated with nanoparticles from candle soot found to generate ultrasonic waves that can be used to monitor the structural integrity of buildings

Abstract:
Many industrial buildings, including nuclear power plants and chemical plants, rely on ultrasound instruments that continually monitor the structural integrity of their systems without damaging or altering their features. One new technique draws on laser technology and candle soot to generate effective ultrasonic waves for nondestructive testing and evaluation.

Laser-based ultrasound approach provides new direction for nondestructive testing: Patches coated with nanoparticles from candle soot found to generate ultrasonic waves that can be used to monitor the structural integrity of buildings

Washington, DC | Posted on September 4th, 2019

Many industrial buildings rely on ultrasound instruments that continually monitor the structural integrity of their systems without damaging or altering their features. One new technique draws on laser technology and candle soot to generate effective ultrasonic waves for nondestructive testing and evaluation. Researchers are using ultrasonic nondestructive testing that involves amplifying the signal from a photoacoustic laser source using laser-absorbing patch made from an array of nanoparticles from candle soot and polydimethylsiloxane. This image shows the fabrication process of patterned candle soot (CS) nanoparticle (NP) polydimethylsiloxane (PDMS) patch.

CREDIT
Taeyang Kim

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Applied Physics Letters features rapid reports on significant discoveries in applied physics. The journal covers new experimental and theoretical research on applications of physics phenomena related to all branches of science, engineering, and modern technology. See https://aip.scitation.org/journal/apl .

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The article, "Narrow band photoacoustic lamb wave generation for nondestructive testing using candle soot nanoparticle patches," is authored by Taeyang Kim, Wei-Yi Chang, Howuk Kim and Xiaoning Jiang. The article will appear in Applied Physics Letters on Sept. 3, 2019 (DOI: 10.1063/1.5100292). After that date, it can be accessed at:

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