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Open AccessArticle

Experimental Comparison of Photothermal Conversion Efficiency of Gold Nanotriangle and Nanorod in Laser Induced Thermal Therapy

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2017, 7(12), 416; https://doi.org/10.3390/nano7120416
Received: 3 November 2017 / Revised: 16 November 2017 / Accepted: 22 November 2017 / Published: 26 November 2017
(This article belongs to the Special Issue Nanomaterials for Imaging, Diagnosis or Therapy)
An experimental comparison of the photothermal conversion efficiency (PCE) for gold nanotriangles (GNTs) and nanorods (GNRs) was carried out in the present work. The discrete dipole approximation method was applied to identify the spectral characteristic of GNTs and GNRs with different aspect ratios. On this basis, the PCE of GNTs and GNRs in photothermal therapy were compared theoretically. Afterwards, an in vitro experiment was adopted to investigate the thermal effect of porcine muscle induced by laser irradiation, with and without injected GNTs and GNRs. The influences of laser total power, nanoparticle concentration, and nanoparticle type were investigated. It was found that for the commonly-used wavelengths for photothermal therapy, the PCE of GNTs is higher than that of the GNRs. Furthermore, for GNRs loaded in tissue in vitro, high laser power and high concentration of nanoparticles leads to the degeneration and even carbonization of tissue. However, for the GNTs with the same situation (laser power, nanoparticle volume concentration, and heating time), it could lead to the tissue’s evaporation instead of carbonization. View Full-Text
Keywords: gold nanoparticle; photothermal conversion; nanotriangle; nanorod; photothermal therapy gold nanoparticle; photothermal conversion; nanotriangle; nanorod; photothermal therapy
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MDPI and ACS Style

Chen, Q.; Chen, Q.; Qi, H.; Ruan, L.; Ren, Y. Experimental Comparison of Photothermal Conversion Efficiency of Gold Nanotriangle and Nanorod in Laser Induced Thermal Therapy. Nanomaterials 2017, 7, 416.

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