Synthesis of Colloidal Gold Nanorods with Plasmon Absorbance Wavelength in the Near Infrared Region. Issue 30 (28th June 2016)

• Record Type: Journal Article
• Authors: Angelats-Silva, Luis M.; Asmat-Campos, David; León-León, Henry; Wilkinson, Kevin A.; Sánchez-Vaca, Daniel A.; López-Milla, Alcides
• Is Part Of: MRS advances. Volume 1:Issue 30(2016)
• Page Start: 2181
• Page End: 2186
• Publication Date: 2016-06-28
• Subjects: Au, -- chemical synthesis, -- colloid; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/adv.2016.486
• Languages: English
• ISSNs: 2059-8521

Abstract

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.