TAILIEUCHUNG - Seeded growth synthesis of gold nanorods for photothermal application

In this paper, the gold nanorods (GNRs) were synthesized via a seed-mediated method by using 1-3 nm seeds-in diameter and gold atoms created from the reduced Au3+ ions by ascorbic acid (AA) in the presence of cetyltrimethyl ammonnium bromide (CTAB) as a soft template. | Vietnam Journal of Science and Technology 56 (2) (2018) 148-157 DOI: SEEDED GROWTH SYNTHESIS OF GOLD NANORODS FOR PHOTOTHERMAL APPLICATION Do Thi Hue1, 2, Vu Thi Thuy Duong1, Nguyen Trong Nghia1, Tran Hong Nhung1, Nghiem Thi Ha Lien1, * 1 Institute of Physics, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam 2 * Email: halien@ Received: 22 February 2017; Accepted for publication: 10 January 2018 Abstract. In this paper, the gold nanorods (GNRs) were synthesized via a seed-mediated method by using 1-3 nm seeds-in diameter and gold atoms created from the reduced Au3+ ions by ascorbic acid (AA) in the presence of cetyltrimethyl ammonnium bromide (CTAB) as a soft template. The aspect ratio of GNRs as well as growth yield were controlled by adjusting the concentration of Ag+ ions. This method gave the formation of mono-dispersed GNRs with the controlled size and peak plasmon resonance. The UV-VIS-NIR absorption spectra and transmission electronic microscopy (TEM) images of the GNR solution showed that the plasmon absorption spectra depend on the aspect ratio of GNRs. The GNRs were also attached with bioconjugate molecules in order to be more stable and used in biomedical applications. This work also presents the results of photothermal effects of GNRs in real tissues by changing the power density of laser beam. Keywords: gold nanorods (GNRs), plasmon absorption, photothermal effect, seed-mediated method. Classification numbers: ; ; . 1. INTRODUCTION GNRs show different colors depending on the aspect ratio, which is due to the two intense surface plasmon resonance peaks (longitudinal surface plasmon peak and transverse surface plasmon peak) corresponding to the oscillation of the free electrons along and perpendicularly to the long axis of the rods [1]. GNRs have attracted the most attention because of their

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• Seeded growth synthesis of gold nanorods
• Gold nanorods for photothermal application
• The gold nanorods
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