Scientists in Germany have developed a spectroscopy method to measure diabetics’ glucose levels through their skin.
When a sample is irradiated with IR light, it produces a temperature increase and when this heat diffuses to a material in contact with the sample, a temperature gradient is created, causing a thermal lens – just like the mirage effect you see in the air on the surface of a hot road. By examining the deflection of a probe beam across this lens, you can study the thermal and optical properties of the sample.
Read the full article in Chemistry World
Photothermal deflectometry enhanced by total internal reflection enables non-invasive glucose monitoring in human epidermis
M.A.Pleitez, O.Hertzberg, A.Bauer, M.Seeger, T.Lieblein, H.v.Lilienfeld-Toalb and W.Mäntelea
Analyst, 2015, Advance Article
DOI: 10.1039/C4AN01185F
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