Title :
Bio-chemical sensor using polyaniline nanofibers for sensing amino-group type of gas
Author :
Yao, Da-Jeng ; Yang, Yong-Ruei
Author_Institution :
Inst. of Microelectromech. Syst., Nat. Tsing Hua Univ., Hsinchu
Abstract :
Traditionally, polyaniline was used for sensing ammonia (NH3 ) gas due to the change of conductivity. By integrated with surface acoustic wave sensor (SAW) for sensing the amino-group type of gas, a novel bio-chemical sensor had been developed. The mechanism of the SAW sensor is that the change of gravity results in the change of physical characteristics of SAW sensor. In order to increase the absorbability of the polymer, we use the nano structure to increase the surface area ratio that can make gaseous molecular being absorbed onto the nano structure quickly. Three kinds of solvent vapor were tested: ammonium hydroxide, triethylamine, and acetone
Keywords :
biochemistry; biotechnology; chemical sensors; polymers; NH3; acetone; amino-group type of gas; ammonium hydroxide; biochemical sensor; polyaniline nanofibers; surface acoustic wave sensor; triethylamine; Acoustic sensors; Acoustic waves; Biosensors; Conductivity; Gas detectors; Gravity; Polymers; Sensor phenomena and characterization; Solvents; Surface acoustic waves;
Conference_Titel :
Robotics and Biomimetics (ROBIO). 2005 IEEE International Conference on
Conference_Location :
Shatin
Print_ISBN :
0-7803-9315-5
DOI :
10.1109/ROBIO.2005.246365
