Protein adsorption enhanced radio-frequency heating of silica nanoparticles

Jarek Wosik, Rohit Pande, Leiming Xie, Dhivya Ketharnath, Srimeenakshi Srinivasan, Biana Godin

Research output: Contribution to journalArticle

3 Scopus citations

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.

Original languageEnglish (US)
Article number043706
JournalApplied Physics Letters
Volume103
Issue number4
DOIs
StatePublished - Jul 22 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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