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Low-power near-field microwave applicator for localized heating of soft matter

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5 Author(s)
Copty, A. ; The Racah Institute of Physics, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel ; Sakran, F. ; Golosovsky, M. ; Davidov, D.
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We report a 9 GHz near-field microwave probe for local surface heating of microwave absorbing materials. The probe radiates microwave energy through a narrow slot microfabricated at the apex of the dielectric resonator. The microwave energy is concentrated in a small region close to the applicator, in such a way that the microwave intensity there is very high. A temperature of 60–120 °C can be achieved in a spot size as small as 0.3×0.5 mm2, using an input power of only a few watts. The applicator can be used for local heating, coagulation, and melting of various soft-matter mediums. Particularly, we emphasize results on local heating and coagulation of egg-white and albumin which may be used as a “biological solder” for tissue welding applications. © 2004 American Institute of Physics.

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Applied Physics Letters  (Volume:84 ,  Issue: 25 )