DocumentCode :
2205087
Title :
The acid-base properties of carboxylated CNT and the design of CNT based biosensor
Author :
Kwon, Hyuk Je ; Woo, Jun-Myung ; Lim, Jaeheung ; Kim, Seok Hyang ; Park, Young June
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., Seoul, South Korea
fYear :
2012
fDate :
16-18 March 2012
Firstpage :
161
Lastpage :
162
Abstract :
We observed the sign of the two responses from carboxylated carbon nanotube (CNT) based sensor in aqueous solution by means of dynamic measurements. Two types of surface groups, the hydroxyl and the carboxyl group of sensor surface are amphoteric materials depending on the pH. The protonation/deprotonation of these surface groups modulates CNT conductance. After blocking of COOH group on the CNT surface, CNT characteristics become insensitive to pH condition. This result brings benefits to reliable operation and high sensitivity of CNT based sensor.
Keywords :
biosensors; carbon nanotubes; pH; C; COOH group blocking; acid-base properties; amphoteric materials; aqueous solution; biosensor; carboxyl group; carboxylated carbon nanotube; deprotonation; dynamic measurements; hydroxyl group; pH condition; protonation; surface groups; Biosensors; CNTFETs; Educational institutions; Integrated circuit reliability; Sensitivity; Surface treatment;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Bioengineering Conference (NEBEC), 2012 38th Annual Northeast
Conference_Location :
Philadelphia, PA
ISSN :
2160-7001
Print_ISBN :
978-1-4673-1141-0
Type :
conf
DOI :
10.1109/NEBC.2012.6207013
Filename :
6207013
Link To Document :
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