Understanding blue shift of the longitudinal surface plasmon resonance during growth of gold nanorods

We have investigated in detail the growth dynamics of gold nanorods with various aspect ratios in different surrounding environments. Surprisingly, a blue shift in the temporal evolution of colloidal gold nanorods in aqueous medium has been observed during the growth of nanorods by UV visible absorp...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2021-06
Main Authors: Sahu, Aditya K, Das, Anwesh, Ghosh, Anirudha, Raj, Satyabrata
Format: Article
Language:English
Subjects:
Absorption spectra
Aqueous solutions
Aspect ratio
Blue shift
Doppler effect
Gold
Nanorods
Red shift
Spectrum analysis
Surface chemistry
Surface plasmon resonance
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have investigated in detail the growth dynamics of gold nanorods with various aspect ratios in different surrounding environments. Surprisingly, a blue shift in the temporal evolution of colloidal gold nanorods in aqueous medium has been observed during the growth of nanorods by UV visible absorption spectroscopy. The longitudinal surface plasmon resonance peak evolves as soon as the nanorods start to grow from spheres, and the system undergoes a blue shift in the absorption spectra. Although a red-shift is expected as a natural phenomenon during the growth process of all nanosystems, our blue shift observation is regarded as a consequence of competition between the parameters of growth solution and actual growth of nanorods. The growth of nanorods contributes to the red-shift which is hidden under the dominating contribution of the growth solution responsible for the observed massive blue shift.
ISSN:2331-8422
DOI:10.48550/arxiv.2106.06365