Photoacoustic Spectroscopy (PAS)Oluwatobi Williams

Photoacoustic Spectroscopy

• What is it?• Photoacoustic Spectroscopy is the

measurement of the effect of absorbed electromagnetic energy (particularly of light) on matter by means of acoustic detection.

• Alexander Graham Bell 1880

Photoacoustic Spectroscopy Instrumentation

PAS Light Sources(INCOHERENT)

PAS Light Sources(COHERENT)

PAS Cell

Other Components

• Microphone

• Monochromator

• Amplifier

Photoacoustic Spectroscopy Biomedical Applications

Photoacoustic Imaging

Measuring Blood Glucose

Photoacoustic Microscopy

Works CitedHilger, A. (usa). Laser Analytical Spectrochemistry. Bristol, MA: IOP Publishing.

L. V. Wang, “Multiscale photoacoustic microscopy and computed tomography,” Nature Photonics 3 (9), 503–509 (Sep. 2009).

Rosencwaig, A. (1975). Photoacoustic spectroscopy. New tool for investigation of solids. Analytical Chemistry, 47(6), 592A–604a. doi:10.1021/ac60356a015

Chen, L., Zhao, B., Xiao, H., Tong, R., & Gao, C. (2012). Photoacoustic spectroscopy analysis of traditional Chinese medicine. International Journal of Thermophysics, 34(8-9), 1532–1539. doi:10.1007/s10765-012-1357-z

Chen, Z. J., Fang, J. W., & Zhang, S. Y. (2014). Photoacoustic spectroscopy of BiOCl Photocatalyst powder. International Journal of Thermophysics, 36(5-6), 910–918. doi:10.1007/s10765-014-1627-z

Su, J. L., Wang, B., Wilson, K. E., Bayer, C. L., Chen, Y.-S., Kim, S., … Emelianov, S. Y. (2010). Advances in Clinical and Biomedical Applications of Photoacoustic Imaging. Expert Opinion on Medical Diagnostics, 4(6), 497–510. http://doi.org/10.1517/17530059.2010.529127

Media, P. (2014, January 24). Photoacoustic spectroscopy takes sting out of glucose testing. Retrieved November 7, 2016, from http://www.photonics.com/Article.aspx?AID=55779