preliminary results of treating cancerous cells of lung (qu-db) by hyperthermia using diode laser and gold coated fe3o4/sio2 nano-shells: an in-vitro assay
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2013
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Abstract
Introduction In this study, we describe the results of controlled synthesis and application of gold coated Fe3O4/SiO2 nano-shells combined with the optical property of gold for enhancement of selective photothermal interaction with cancerous cells based on the surface plasmon resonance (SPR) Phenomena. Materials and Methods Magnetite Nano-Particles (MNPs) were prepared by means of co-precipitation. MNPs were modified with a thin layer of Silica using the Stober method. The amino-modified Fe3O4/SiO2 nano-shells were covered with gold colloids as a self-assembeled process. In-vitro assays were performed to determine the effect of apoptosis of the cells based on the cells morphological changes. Results The biologically inert nano-shells (85 nm) with a Magnetite/Silica core and a gold shell were optically activated. A successful laser-hyperthermia based on the thermal effect of surface plasmon resonance was performed using different gold concentrations. The thermal profile effects of laser power are presented as ideal cases of nanoshell-assisted photo-thermal therapy. The thermally-induced cell death has been shown to be dependent on NPs concentration and laser power density. The power densities of 157 and 184 W/cm2 caused complete cell death at the focal point of the laser beam.Cell damage was reduced by decreasing the power density of laser. Also, a larger area of damage on cell culture plates was observed at longer intervals of laser irradiation. Conclusion An optimized laser-(SPR) hyperthermia was obtained using a concentration of gold coated Fe3O4/SiO2 nano-shells concentration=0.1 mg/ml at intensity=157 W/cm2 at 60s.
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khosroshahi2013iranianpreliminary
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| Authors | ;Mohammad Etrati Khosroshahi;Lida Ghazanfari;Zahra Hasan-nejad |
| Journal | the international archives of the photogrammetry, remote sensing and spatial information sciences |
| Year | 2013 |
| DOI |
10.22038/ijmp.2013.469
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