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Gold Nanorods: Near-Infrared Plasmonic Photothermal Conversion and Surface Coating

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DOI: 10.4236/msce.2014.21004    3,980 Downloads   7,269 Views   Citations

ABSTRACT

In this paper, AuNRs colloids with SPRL located at ~810 nm and ~1100 nm were synthesized using an improved seed method. Based on the NIR lasers available, photothermal conversion 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 of colloid 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 deformation from 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 surface coating can be used not only in keeping the stability of AuNRs for further treatment, but also in increasing plasmonic property and biocompatibility. This work will be useful for designing plasmonic photothermal properties and further applications in nanomedicine.

Conflicts of Interest

The authors declare no conflicts of interest.

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.

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