Controlled amine functionalization on conducting polypyrrole nanotubes as effective transducers for volatile acetic acid.
Pristine (carboxylated) and aminated polypyrrole nanotubes were successfully fabricated using vapor deposition polymerization with a template. In particular, aminated polypyrrole nanotubes were readily synthesized by modifying the nanotube surface with open polyamine chains. Pristine and aminated polymer nanotubes were used as the transducer to acetic acid vapor. Amino-functionalized nanotubes revealed more enhanced sensitivity than the pristine carboxylated nanotubes with the increasing number of amine spacers due to the increased polymer/analyte partition coefficient and mass uptake of the analyte. Moreover, polyamine-functionalized nanotubes presented a reversible and reproducible response to acetic acid up to 40% sensitivity. The aminated polypyrrole nanotubes demonstrated the potential capability to be excellent transducers for volatile fatty acids in disposable sensors.
Ko
Sungrok
S
Hyperstructured Organic Materials Research Center, School of Chemical and Biological Engineering, College of Engineering, Seoul National University, 56-1 Shinlim Kwanak, Seoul 151-742, South Korea.
Jang
Jyongsik
J
D000085:Acetates / Q000737:chemistry*; D019342:Acetic Acid / Q000737:chemistry; D000588:Amines / Q000737:chemistry*; D004566:Electrodes; D004867:Equipment Design; D005227:Fatty Acids / Q000737:chemistry; D005898:Glass; D046911:Macromolecular Substances; D046529:Microscopy, Electron, Transmission; D043942:Nanotubes / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013059:Spectrum Analysis, Raman
D000085:Acetates; D000588:Amines; D005227:Fatty Acids; D046911:Macromolecular Substances; D011073:Polyamines; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; D019342:Acetic Acid