Issue 6, 2015

Surface functionalization-enhanced magnetism in SnO2 nanoparticles and its correlation to photoluminescence properties

Abstract

A high value of magnetic moment of 0.08 emu g−1 at room temperature for SnO2 nanoparticles (NPs) was observed. Surface functionalization with octadecyltrichlorosilane (OTS) enhanced the saturation magnetic moment of NPs to an anomalously high value of 0.187 emu g−1 by altering the electronic configuration on the NPs surface. Surface functionalization also suppressed photoluminescence (PL) peaks arising from oxygen defects around 2 eV and caused an increase in the intensities of two peaks near the violet region (2.6–3 eV). PL studies under a uniform external magnetic field enriched the understanding of the role of OTS. Both OTS and external magnetic fields significantly modulated the luminescence spectra by altering the surface electronic structure of NPs. Extra spins on the surface of SnO2 NPs created by the surface functionalization process and their influence on resultant magnetic moment and luminescence properties are discussed in detail.

Graphical abstract: Surface functionalization-enhanced magnetism in SnO2 nanoparticles and its correlation to photoluminescence properties

Supplementary files

Article information

Article type
Paper
Submitted
01 Oct 2014
Accepted
23 Nov 2014
First published
25 Nov 2014

J. Mater. Chem. C, 2015,3, 1261-1267

Surface functionalization-enhanced magnetism in SnO2 nanoparticles and its correlation to photoluminescence properties

V. Bonu, A. Das, M. Sardar, S. Dhara and A. K. Tyagi, J. Mater. Chem. C, 2015, 3, 1261 DOI: 10.1039/C4TC02210F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements