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
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