Issue 22, 2015
From the journal:

RSC Advances

Observation of weak localization of light in gold nanofluids synthesized using the marine derived fungus Aspergillus niger

Vishakha Dave,a   Anjana K. Valab  and  Rajesh Patel*a  

* Corresponding authors

a Department of Physics, Maharaja Krishnakumarsinhji Bhavnagar University, Bhavnagar 364002, India
E-mail: rjp@mkbhavuni.edu.in, rpat7@yahoo.com

b Department of Lifesciences, Maharaja Krishnakumarsinhji Bhavnagar University, Bhavnagar 364002, India

Abstract

We have observed weak localization of light for the first time in gold nanofluids synthesized using the marine derived fungus Aspergillus niger. Coherent backscattering of waves by a disordered scattering medium is responsible for weak localization of light. We have directly observed this effect using polarized visible light and for different sized gold nanoparticles in nanofluids. The localization parameter kl* obtained from the observation is 1 < kl* < 5, which is the precondition for the weak localization of light. The kl* is controlled by the size and concentration of the particles in the nanofluids. Quadratic scaling is used to study the localization transition. The localization length obtained is nearly 225 nm. Gold nanoparticles have potential applications in biomedicine, imaging, catalysis and photonics.

Graphical abstract: Observation of weak localization of light in gold nanofluids synthesized using the marine derived fungus Aspergillus niger

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Article information

DOI
https://doi.org/10.1039/C4RA13292K
Article type
Paper
Submitted
28 Oct 2014
Accepted
30 Jan 2015
First published
30 Jan 2015

RSC Adv., 2015,5, 16780-16784

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Observation of weak localization of light in gold nanofluids synthesized using the marine derived fungus Aspergillus niger

V. Dave, A. K. Vala and R. Patel, RSC Adv., 2015, 5, 16780 DOI: 10.1039/C4RA13292K

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