Synthesis of Colloidal Gold Nanorods with Plasmon Absorbance Wavelength in the Near Infrared Region
- PDF / 1,075,020 Bytes
- 7 Pages / 612 x 792 pts (letter) Page_size
- 109 Downloads / 175 Views
Advances:
Email alerts: Click here Subscriptions: Click here Commercial reprints: Click here Terms of use : Click here
Synthesis of Colloidal Gold Nanorods with Plasmon Absorbance Wavelength in the Near Infrared Region Luis M. Angelats-Silva, David Asmat-Campos, Henry León-León, Kevin A. Wilkinson, Daniel A. Sánchez-Vaca and Alcides López-Milla MRS Advances / FirstView Article / July 2016, pp 1 - 6 DOI: 10.1557/adv.2016.486, Published online: 28 June 2016
Link to this article: http://journals.cambridge.org/abstract_S2059852116004862 How to cite this article: Luis M. Angelats-Silva, David Asmat-Campos, Henry León-León, Kevin A. Wilkinson, Daniel A. Sánchez-Vaca and Alcides López-Milla Synthesis of Colloidal Gold Nanorods with Plasmon Absorbance Wavelength in the Near Infrared Region. MRS Advances, Available on CJO 2016 doi:10.1557/adv.2016.486 Request Permissions : Click here
Downloaded from http://journals.cambridge.org/ADV, IP address: 207.162.240.147 on 26 Jul 2016
MRS Advances © 2016 Materials Research Society DOI: 10.1557/adv.2016.486
Synthesis of Colloidal Gold Nanorods with Plasmon Absorbance Wavelength in the Near Infrared Region Luis M. Angelats-Silva1, David Asmat-Campos1, Henry León-León1, Kevin A. Wilkinson1, Daniel A. Sánchez-Vaca2 and Alcides López-Milla3 1
Multidisciplinary Research Laboratory, Universidad Privada Antenor Orrego, Trujillo-Perú. Department of Agro Industry, Universidad Nacional del Santa, Nuevo Chimbote – Perú. 3 Faculty of Sciences, Universidad Nacional de Ingeniería, Lima – Perú 2
ABSTRACT We report preparation and characterization of colloidal gold nanorods (AuNR) with plasmon absorbance over 950 nm and an aspect ratio of 7.2 by tuning silver nitrate concentration and the CTAB/BDAC ratio during growth. Samples were analyzed by scanning transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy and measurement of zeta potential. Addition of 170 μM silver nitrate to the CTAB-containing reaction mixture allowed preparation of AuNRs with a maximum absorbance peak at 941.8 nm and a yield around 96%. Optimization of the BDAC/CTAB ratio allowed for a further redshift of the absorbance maximum to 954.0 nm, but with poorer yields. INTRODUCTION Gold nanorods (AuNR) with a large enough aspect ratio have useful properties that make them good candidates for phototherapy because they may be stimulated with near-infrared radiation (NIR) to induce hyperthermia in a targeted volume while leaving surrounding tissues largely unharmed [1-8]. Seed-mediated chemical reduction of chloroauric acid is one of the most effective, controllable, and high-yielding methods commonly used [9-12] to prepare AuNR. A surfactant, usually cetyltrimethylammonium bromide (CTAB), is used to direct the size and shape of gold nanoparticles [13]. Additionally, presence of silver ions can also increase aspect ratios [9]. However, it still remains a challenge to prepare high aspect ratio AuNRs, although some progress has been made [13]. Here, evaluate two growth strategies shown to help with Au
Data Loading...
