Gold Nanorods: Near-Infrared Plasmonic Photothermal Conversion and Surface CoatingReportar como inadecuado




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In this paper,AuNRs colloids with SPRL located at ~810 nm and ~1100 nm were synthesized using animproved seed method. Based on the NIR lasers available, photothermalconversion of AuNRs were systematically studied compared with that of water.Under low power irradiation, the highest temperature is obtained when the SPRL wavelength of AuNRs is equal to the laser wavelength, and temperature ofcolloid increases from ~20°C to ~65°C. With increasing laser power such as 6 W,the AuNRs colloid boils within a few minutes, and nanorods undergo a shape deformationfrom rod to spherical particle and even fusion, and the SPRL disappears.For further investigation, the obtained AuNRs were coated with SiO2 shell to form a core-shell nanostructure Au@SiO2. The surfacecoating can be used not only in keeping the stability of AuNRs for furthertreatment, but also in increasing plasmonic property and biocompatibility. Thiswork will be useful for designing plasmonic photothermal properties and furtherapplications in nanomedicine.

KEYWORDS

Gold Nanorods; Surface Plasmon Resonance; Photothermal Effect; Core-Shell

Cite this paper

Cong, B. , Kan, C. , Wang, H. , Liu, J. , Xu, H. and Ke, S. 2014 Gold Nanorods: Near-Infrared Plasmonic Photothermal Conversion and Surface Coating. Journal of Materials Science and Chemical Engineering, 2, 20-25. doi: 10.4236-msce.2014.21004.





Autor: Bo Cong, Caixia Kan, Honggeng Wang, Jinsheng Liu, Haiying Xu, Shanlin Ke

Fuente: http://www.scirp.org/



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