Kedawat, Garima and Sharma, Indu and Nagpal, Kanika and Kumar, Mahesh and Gupta, Govind and Gupta, Bipin Kumar (2019) Studies of Ultrafast Transient Absorption Spectroscopy of Gold Nanorods in an Aqueous Solution. ACS Omega, 4 (7). pp. 12626-12631. ISSN 2470-1343

PDF - Published Version Restricted to Registered users only Download (2359Kb) | Request a copy

Abstract

Herein, ultrafast transient absorption spectroscopy is performed to probe the electron transfer studies between aqueous solution and gold nanorods (Au NRs). The seed-mediated growth method is used to synthesize crystalline cylindrical Au NRs having longitudinal plasmon resonance peak maximum at 825 nm. The as-synthesized Au NRs show average width and length of similar to 10 +/- 2 and similar to 50 +/- 2 nm, respectively, with an aspect ratio in the range of similar to 5. The time-resolved decay profiles have been studied in a subpicosecond resolution range using pump wavelength at 410 nm excitation and probe wavelengths from visible to near-infrared region. The plasmon dynamics studies of Au NRs depend on the electron heating phenomena, coherent acoustic phonon vibration and electronic transient behavior, i.e., electron-phonon coupling, and homogenous dephasing processes. Thus, the obtained results highlighted that the ultrafast charge transfer dynamics studies in Au NRs could play an important role to elucidate their electronic, photothermal, and optical properties for molecular imaging, photothermal therapy, and optoelectronic and light-harvesting devices.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s American Chemical Society.
Subjects:	Chemistry Multidisciplinary
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	19 Aug 2026 11:55
Last Modified:	19 Aug 2026 11:55
URI:	https://npl.csircentral.net/id/eprint/4465

Actions (login required)

View Item