Dual-mode thin film bulk acoustic wave resonators for parallel sensing of temperature and mass loading.
Biosens Bioelectron
; 38(1): 369-74, 2012.
Article
en En
| MEDLINE
| ID: mdl-22784500
Thin film bulk acoustic wave resonator (FBAR) devices supporting simultaneously multiple resonance modes have been designed for gravimetric sensing. The mechanism for dual-mode generation within a single device has been discussed, and theoretical calculations based on finite element analysis allowed the fabrication of FBARs whose resonance modes have opposite reactions to temperature changes; one of the modes exhibiting a positive frequency shift for a rise of temperature whilst the other mode exhibits a negative shift. Both modes exhibit negative frequency shift for a mass load and hence by monitoring simultaneously both modes it is possible to distinguish whether a change in the resonance frequency is due to a mass load or temperature variation (or a combination of both), avoiding false positive/negative responses in gravimetric sensing without the need of additional reference devices or complex electronics.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Acústica
/
Técnicas Biosensibles
/
Proteínas
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Biosens Bioelectron
Asunto de la revista:
BIOTECNOLOGIA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Reino Unido
Pais de publicación:
Reino Unido