Multifunctional core–shell Co–SiO2 nanowires via electrodeposition and sol–gel techniques

Martín García, Laura and Ruiz Gómez, Sandra and Abuin Herraez, Manuel and Montaña, Yaiza and Carmona, Noemí and Pérez, Lucas (2015). Multifunctional core–shell Co–SiO2 nanowires via electrodeposition and sol–gel techniques. "RSC Advances" (n. 5); pp. 97503-97507. ISSN 2046-2069. https://doi.org/10.1039/C5RA13905H.

Description

Title: Multifunctional core–shell Co–SiO2 nanowires via electrodeposition and sol–gel techniques
Author/s:
  • Martín García, Laura
  • Ruiz Gómez, Sandra
  • Abuin Herraez, Manuel
  • Montaña, Yaiza
  • Carmona, Noemí
  • Pérez, Lucas
Item Type: Article
Título de Revista/Publicación: RSC Advances
Date: 2015
ISSN: 2046-2069
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this work, we propose a new strategy for the synthesis of multifunctional nanowires using a combination of sol–gel and electrodeposition techniques, based on a two-step procedure. First of all, nanotubes of SiO2 are synthesized via a sol–gel technique using polycarbonate membranes as templates. Homogenous nanotubes are obtained after centrifugation and thermal annealing. Afterwards, a ferromagnetic cobalt core is grown using potentiostatic electrodeposition. Finally, the core–shell Co–SiO2 nanowires are released by dissolving the template using wet-etching. These nanodevices can be used for many detection and sensing purposes. As a proof of concept, we have developed a pH nanosensor by including a pH-sensitive organic dye in the SiO2 shell. The sensing principle is based on the optical response of the organic dye towards pH when added to a solution. The magnetic core allows the recovery of the nanosensors after use. These nanowires can therefore be used as recoverable pH nanosensors. By changing the dye molecule to another molecule or receptor, the procedure described in the paper can be used to synthesize nanodevices for many different applications.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT2011-28751-C02UnspecifiedUnspecifiedUnspecified
Government of SpainMAT2012-38045-C04-03UnspecifiedUnspecifiedUnspecified

More information

Item ID: 41163
DC Identifier: http://oa.upm.es/41163/
OAI Identifier: oai:oa.upm.es:41163
DOI: 10.1039/C5RA13905H
Official URL: http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA13905H#!divAbstract
Deposited by: Memoria Investigacion
Deposited on: 20 Jun 2016 17:35
Last Modified: 20 Jun 2016 17:35
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