Application of a novel electrosynthesized polydopamine-imprinted film to the capacitive sensing of nicotine.
The application of novel electrosynthesized polydopamine (PDA)-imprinted film as a recognition element for the capacitive sensing of nicotine is reported. The PDA-imprinted film was electropolymerized directly on the gold electrode surface in the presence of nicotine without an additional self-assembled thiol sublayer. The compact PDA film has various functional groups that aid the imprinting procedure. Furthermore, the film shows good capacitive response since it is insulating in nature and ultrathin. The sensor's linear response range for nicotine was between 1-25 micromol L(-1), with a detection limit of 0.5 micromol L(-1). The proposed molecularly imprinted polymer capacitive (MIPC) sensor exhibited good selectivity for nicotine. The reproducibility and repeatability of the MIPC sensor were all found to be satisfactory. The results from sample analysis confirmed the applicability of the MIPC sensor to quantitative analysis.
Liu
Kai
K
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People's Republic of China.
Wei
Wan-Zhi
WZ
Zeng
Jin-Xiang
JX
Liu
Xiao-Ying
XY
Gao
Yan-Ping
YP
D004298:Dopamine / Q000737:chemistry*; D025802:Electric Capacitance; D004563:Electrochemistry; D004566:Electrodes; D006801:Humans; D009538:Nicotine / Q000032:analysis* / Q000097:blood / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D015203:Reproducibility of Results
D011108:Polymers; D009538:Nicotine; D004298:Dopamine