A sputtered thin film of nanostructured Ni/Pt/Ti on Al2O3 substrate for ethanol sensing.
A novel thin film ethanol sensor using sputtered Ni/Pt/Ti on an Al2O3 substrate as the working electrode in an alkaline solution was developed. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize the nanostructure of nickel films. Sputtering deposition conditions for maximum catalytic efficiency, electrode selectivity, and reproducibility were discussed. The results showed that ethanol oxidation was more efficient on the sputtered Ni/Pt/Ti on an Al2O3 substrate electrode than that on the conventional nickel electrode. The optimal operating conditions to generate the sputtered Ni/Pt/Ti on the Al2O3 substrate electrode were: 45 min of Ni sputtering deposition time, and 50 W of Ni sputtering power. The results also indicated that the response time of the prepared ethanol sensor is 27 s and the best sensitivity is 3.08 microA microM(-1) cm(-2).
Weng
Yu-Ching
YC
Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan.
Rick
John Frank
JF
Chou
Tse-Chuan
TC
D000537:Aluminum Oxide / Q000737:chemistry*; D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D045424:Complex Mixtures / Q000032:analysis / Q000737:chemistry; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D000431:Ethanol / Q000032:analysis* / Q000737:chemistry; D006358:Hot Temperature; D008567:Membranes, Artificial; D008670:Metals / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods; D009532:Nickel / Q000737:chemistry; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D014159:Transducers
D020099:Coated Materials, Biocompatible; D045424:Complex Mixtures; D008567:Membranes, Artificial; D008670:Metals; D000431:Ethanol; D010984:Platinum; D009532:Nickel; D014025:Titanium; D000537:Aluminum Oxide