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Good vibrations: Using light-heated water to deliver drugs
Date:4/1/2014

icles whose safety in the body remains questionable.

The new method described by Almutairi and colleagues in the departments of Mechanical and Aerospace Engineering, Neuroscience, and Chemistry and Biochemistry at UC San Diego uses NIR at a vibrational wavelength cued to excite water molecules, which absorb the optical energy and convert it to heat. NIR is capable of penetrating biological tissues to greater depths than visible or ultraviolet light.

Co-lead author Wangzhong Sheng, a graduate student in Department of Mechanical and Aerospace Engineering, explained the selectivity of heating by comparing the trapped water within particles to a glass of water and the surrounding water within the solution or tissue to a bathtub. The smaller amount of water is heated much more rapidly because of the enormous volume difference.

An obvious use of the method, said Almutairi, is light-triggered drug delivery, but with more research, she anticipates the new method could provide a variety of industrial, medical and scientific applications, including "any technological application requiring that chemistry be controlled in time and in space, such as in catalysis or self-repairing materials or light-activated sunscreens or pesticide dosing."


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Contact: Scott LaFee
slafee@ucsd.edu
619-543-6163
University of California - San Diego
Source:Eurekalert  

Page: 1 2

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