Title :
Comparing the enhanced sensing interfaces of differently oriented carbon nanotubes onto silicon for bio-chip applications
Author :
Taurino, Irene ; Carrara, Sandro ; Giorcelli, M. ; Tagliaferro, Alberto ; De Micheli, Giovanni
Author_Institution :
EPFL - Ecole Polytech. Fed. de Lausanne, Lausanne, Switzerland
Abstract :
Carbon nanotubes improve the sensitivity of electrochemical biochips. An optimized integration of the nano/bio/CMOS interface is required to realize accurate and low-cost sensors for applications in personalized medicine. The nanotubes orientation on the chip is a key parameter. The role of the sidewalls and the tips surface on the electro-activity of the nano-sensor is still subject of debate in the literature. In this paper, a comparison between vertical densely-packed and randomly-oriented carbon nanotubes directly growth on silicon wafer is proposed in order to identify the best nano-system for biosensing purposes. The comparison is done by using contact-angle measurements, energy dispersive X-ray analysis and electrochemical voltammetry.
Keywords :
CMOS integrated circuits; X-ray chemical analysis; angular measurement; carbon nanotubes; chemical vapour deposition; contact angle; electrochemical sensors; lab-on-a-chip; nanofabrication; nanomedicine; nanosensors; voltammetry (chemical analysis); C; Si; biochip application; biosensing purpose; contact-angle measurement; electroactivity; electrochemical biochip; electrochemical voltammetry; energy dispersive X-ray analysis; nano-bio-CMOS interface; nanosensor; nanosystem; randomly-oriented carbon nanotube; vertical densely-packed carbon nanotube; Sensors;
Conference_Titel :
Advances in Sensors and Interfaces (IWASI), 2011 4th IEEE International Workshop on
Conference_Location :
Savelletri di Fasano
Print_ISBN :
978-1-4577-0623-3
Electronic_ISBN :
978-1-4577-0622-6
DOI :
10.1109/IWASI.2011.6004694
