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Updated: May 8, 2026
Preparation of Silica Nanoparticles Through Microwave-assisted Acid-catalysis
Published on: December 16, 2013
Protein adsorption enhanced radio-frequency heating of silica nanoparticles
Jarek Wosik1, Rohit Pande, Leiming Xie
1Electrical and Computer Engineering Department, University of Houston, Houston, Texas 77204, USA ; Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA.
Abstract:
Measurements of specific-absorption-rate (SAR) of silica 30, 50, and 100 nm nanoparticles (NP) suspended in water were carried out at 30 MHz in 7 kV/m radio-frequency (rf) electric field. Size dependent, NP-suspension interface related heating of silica NP was observed. To investigate a possible mechanism of heating, bovine serum albumin was adsorbed on the surface of silica NPs in suspension. It resulted in significant enhancement of SAR when compared to bare silica NPs. A calorimetric and rf loss model was used to calculate effective conductivity of silica NP with/without adsorbed albumin as a function of silica size and albumin concentration.
