Colloidal europium nanoparticles via a solvated metal atom dispersion approach and their surface enhanced Raman scattering studies

Urumese, Ancila and Jenjeti, Ramesh Naidu and Sampath, S and Jagirdar, Balaji R (2016) Colloidal europium nanoparticles via a solvated metal atom dispersion approach and their surface enhanced Raman scattering studies. In: JOURNAL OF COLLOID AND INTERFACE SCIENCE, 476 . pp. 177-183.

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Abstract

Chemistry of lanthanide metals in their zerovalent state at the nanoscale remains unexplored due to the high chemical reactivity and difficulty in synthesizing nanoparticles by conventional reduction methods. In the present study, europium(0) nanoparticles, the most reactive of all the rare earth metals have been synthesized by solvated metal atom dispersion (SMAD) method using hexadecyl amine as the capping agent. The as-prepared europium nanoparticles show surface Plasmon resonance (SPR) band in the visible region of the electromagnetic spectrum. This lead to the investigation of its surface enhanced Raman scattering (SERS) using visible light excitation source. The SERS activity of europium nanoparticles has been followed using 4-aminothiophenol and biologically important molecules such as hemoglobin and Cyt-c as the analytes. This is the first example of lanthanide metal nanoparticles as SERS substrate which can possibly be extended to other rare-earth metals. Since hemoglobin absorbs in the visible region, the use of visible light excitation source leads to surface enhanced resonance Raman spectroscopy (SERRS). The interaction of biomolecules with Eu(0) has been followed using FT-IR and UV-visible spectroscopy techniques. The results indicate that there is no major irreversible change in the structure of biomolecules upon interaction with europium nanoparticles. (C) 2016 Elsevier Inc. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF COLLOID AND INTERFACE SCIENCE
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Additional Information:	Copy right for this article belongs to the ACADEMIC PRESS INC ELSEVIER SCIENCE, 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
Keywords:	Lanthanides; Europium nanoparticles; SMAD; SERS; 4-ATP; Hemoglobin; Cytochrome-c
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	20 Jul 2016 08:53
Last Modified:	20 Jul 2016 08:53
URI:	http://eprints.iisc.ac.in/id/eprint/54255

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