Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
AlN-based BAW resonators with CNT electrodes for gravimetric biosensing
Year:2011
Research Areas
  • Electronic technology and of the communications
Information
Abstract
Solidly mounted resonators (SMRs) with a top carbon nanotubes (CNTs) surface coating that doubles as an electrode and as a sensing layer have been fabricated. The influence of the CNTs on the frequency response of the resonators was studied by direct comparison to identical devices with a top metallic electrode. It was found that the CNTs introduced significantly less mass load on the resonators and these devices exhibited a greater quality factor, Q (>2000, compared to ?1000 for devices with metal electrodes), which increases the gravimetric sensitivity of the devices by allowing the tracking of smaller frequency shifts. Protein solutions with different concentrations were loaded on the top of the resonators and their responses to mass-load from physically adsorbed coatings were investigated. Results show that resonators using CNTs as the top electrode exhibited a higher frequency change for a given load (?0.25 MHz cm2 ng?1) compared to that of a metal thin film electrode (?0.14 MHz cm2 ng?1), due to the lower mass of the CNT electrodes and their higher active surface area compared to that of a thin film metal electrode. It is therefore concluded that the use of CNT electrodes on resonators for their use as gravimetric biosensors is a significant improvement over metallic electrodes that are normally employed.
International
Si
JCR
Si
Title
Sensors and Actuators B: Chemical
ISBN
0925-4005
Impact factor JCR
3,339
Impact info
Volume
160
10.1016/j.snb.2011.09.083
Journal number
From page
1386
To page
1393
Month
SIN MES
Ranking
Participants
  • Autor: Enrique Iborra Grau (UPM)
  • Autor: Marta Clement Lorenzo (UPM)
  • Autor: Jimena Olivares Roza (UPM)
  • Autor: Luis García-Gancedo (Electrical Engineering Division, University of Cambridge, Cambridge, United Kingdom)
  • Autor: Z. Zhu (Electrical Engineering Division, University of Cambridge, Cambridge, United Kingdom)
  • Autor: A. J. Flewitt (Electrical Engineering Division, University of Cambridge, Cambridge, United Kingdom)
  • Autor: W. I. Milne (Electrical Engineering Division, University of Cambridge, Cambridge, United Kingdom)
  • Autor: G. M. Ashley (Electrical Engineering Division, University of Cambridge, Cambridge, United Kingdom)
  • Autor: J. K. Luo (Electrical Engineering Division, University of Cambridge, Cambridge, United Kingdom)
  • Autor: X. B. Zhao (Electrical Engineering Division, University of Cambridge, Cambridge, United Kingdom)
  • Autor: J. R. Lu (Electrical Engineering Division, University of Cambridge, Cambridge, United Kingdom)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Microsistemas y Materiales Electrónicos
  • Centro o Instituto I+D+i: Centro de Materiales y Dispositivos Avanzados para Tecnologías de Información y Comunicaciones
  • Departamento: Tecnología Electrónica
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)