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

fYear

2011

fDate

28-29 June 2011

Firstpage

90

Lastpage

93

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IWASI.2011.6004694

Filename

6004694