A method to measure specific absorption rate of nanoparticles in colloidal suspension using different configurations of radio-frequency fields

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

doi:10.1063/1.4748285

A method to measure specific absorption rate of nanoparticles in colloidal suspension using different configurations of radio-frequency fields

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

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We report a method for characterization of the efficiency of radio-frequency (rf) heating of nanoparticles (NPs) suspended in an aqueous medium. Measurements were carried out for water suspended 5 nm superparamagnetic iron-oxide NPs with 30 nm dextran matrix for three different configurations of rf electric and magnetic fields. A 30 MHz high-Q resonator was designed to measure samples placed inside a parallel plate capacitor and solenoid coil with or without an rf electric field shield. All components of rf losses were analyzed and rf electric and magnetic field induced heating of NPs and the dispersion medium was determined and discussed.

Original language	English (US)
Article number	083118
Journal	Applied Physics Letters
Volume	101
Issue number	8
DOIs	https://doi.org/10.1063/1.4748285
State	Published - Aug 20 2012

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4748285

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@article{a104c132d788492d9bbeefa4c008dff6,

title = "A method to measure specific absorption rate of nanoparticles in colloidal suspension using different configurations of radio-frequency fields",

abstract = "We report a method for characterization of the efficiency of radio-frequency (rf) heating of nanoparticles (NPs) suspended in an aqueous medium. Measurements were carried out for water suspended 5 nm superparamagnetic iron-oxide NPs with 30 nm dextran matrix for three different configurations of rf electric and magnetic fields. A 30 MHz high-Q resonator was designed to measure samples placed inside a parallel plate capacitor and solenoid coil with or without an rf electric field shield. All components of rf losses were analyzed and rf electric and magnetic field induced heating of NPs and the dispersion medium was determined and discussed.",

author = "Dhivya Ketharnath and Rohit Pande and Leiming Xie and Srimeenakshi Srinivasan and Biana Godin and Jarek Wosik",

note = "Funding Information: The authors are grateful to Audrius Brazdeikis for discussions and for providing us with SPIO NPs sample. This work was supported by IBIS (TMH) and TcSUH. B.G. acknowledges support from NIH U54CA143837 (CTO, PS-OC) and 1U54CA151668-01 (TCCN, CCNE). R.P. is grateful for a partial support from CPRiT/TMH grant.",

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T1 - A method to measure specific absorption rate of nanoparticles in colloidal suspension using different configurations of radio-frequency fields

AU - Ketharnath, Dhivya

AU - Pande, Rohit

AU - Xie, Leiming

AU - Srinivasan, Srimeenakshi

AU - Godin, Biana

AU - Wosik, Jarek

N1 - Funding Information: The authors are grateful to Audrius Brazdeikis for discussions and for providing us with SPIO NPs sample. This work was supported by IBIS (TMH) and TcSUH. B.G. acknowledges support from NIH U54CA143837 (CTO, PS-OC) and 1U54CA151668-01 (TCCN, CCNE). R.P. is grateful for a partial support from CPRiT/TMH grant.

PY - 2012/8/20

Y1 - 2012/8/20

N2 - We report a method for characterization of the efficiency of radio-frequency (rf) heating of nanoparticles (NPs) suspended in an aqueous medium. Measurements were carried out for water suspended 5 nm superparamagnetic iron-oxide NPs with 30 nm dextran matrix for three different configurations of rf electric and magnetic fields. A 30 MHz high-Q resonator was designed to measure samples placed inside a parallel plate capacitor and solenoid coil with or without an rf electric field shield. All components of rf losses were analyzed and rf electric and magnetic field induced heating of NPs and the dispersion medium was determined and discussed.

AB - We report a method for characterization of the efficiency of radio-frequency (rf) heating of nanoparticles (NPs) suspended in an aqueous medium. Measurements were carried out for water suspended 5 nm superparamagnetic iron-oxide NPs with 30 nm dextran matrix for three different configurations of rf electric and magnetic fields. A 30 MHz high-Q resonator was designed to measure samples placed inside a parallel plate capacitor and solenoid coil with or without an rf electric field shield. All components of rf losses were analyzed and rf electric and magnetic field induced heating of NPs and the dispersion medium was determined and discussed.

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JF - Applied Physics Letters

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ER -

A method to measure specific absorption rate of nanoparticles in colloidal suspension using different configurations of radio-frequency fields

Abstract

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