Issue 4, 2017, Issue in Progress

Sensitivity enhancement of graphene Hall sensors modified by single-molecule magnets at room temperature

Abstract

Single-molecule magnets (SMMs) possess many unique magnetic properties and thus attract a wide range of attention. However, the applications of SMMs always need a strict atmosphere, i.e. low temperature, high vacuum and strong magnetic field. In this work, we report the preparation and characterization of sensitivity enhanced graphene Hall elements (GHEs) decorated with Tb-core SMMs. By comparing the magnetic sensing and electronic tests of the GHEs before and after the SMMs modifications, the sensitivity of the GHEs increases by 44.9% in voltage mode and 59.0% in current mode compared with pristine GHEs. The increase of sensitivity may result from the magnetic center introduction of SMMs at room temperature. Moreover, the magnetic molecules may affect the graphene field environment leading to a Hall signal change. In addition, the SMMs modified GHEs present excellent linearity, offset voltage, repeatability and stability in magnetic sensing. This study paves the way to apply SMMs into practical use at room temperature and atmospheric pressure without strong magnetic field excitations.

Graphical abstract: Sensitivity enhancement of graphene Hall sensors modified by single-molecule magnets at room temperature

Supplementary files

Article information

Article type
Communication
Submitted
02 Dec 2016
Accepted
16 Dec 2016
First published
04 Jan 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 1776-1781

Sensitivity enhancement of graphene Hall sensors modified by single-molecule magnets at room temperature

Y. Zheng, L. Huang, Z. Zhang, J. Jiang, K. Wang, L. Peng and G. Yu, RSC Adv., 2017, 7, 1776 DOI: 10.1039/C6RA27673C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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