TY - JOUR
T1 - Electrochemical biosensor based on Pt/Au alloy nanowire arrays for phosphate detection
AU - Cui, Jiewu
AU - Ogabiela, Edward E.
AU - Hui, Jianing
AU - Wang, Yan
AU - Zhang, Yong
AU - Tong, Liang
AU - Zhang, Jianfang
AU - Adeloju, Samuel B.
AU - Zhang, Xinyi
AU - Wu, Yucheng
PY - 2015
Y1 - 2015
N2 - Well aligned Pt/Au alloy nanowire arrays are successfully synthesized and used as the substrate for the construction of phosphate biosensors. Pyruvate oxidase is immobilized onto the nanowire surface together with co-factors via cross linking approach. Morphology, composition, structure and chemical state of the nanowires are characterized by SEM, TEM, EDS and XPS, and the electrochemical behaviors of the as-prepared phosphate biosensors are investigated by cyclic voltammogramic and chronoamperometric techniques. Especially, the influence of the composition and aspect ratio of Pt/Au alloy nanowire arrays on the response of phosphate biosensors are studied as well. The present phosphate biosensor shows a high sensitivity of 50.5 μA· cm-2 ·mM-1 and a wide linear range between 248 and 1456 μM toward the detection of phosphate. In addition, the biosensor also exhibits good selectivity and stability, which promises great potential in phosphate detection applications.
AB - Well aligned Pt/Au alloy nanowire arrays are successfully synthesized and used as the substrate for the construction of phosphate biosensors. Pyruvate oxidase is immobilized onto the nanowire surface together with co-factors via cross linking approach. Morphology, composition, structure and chemical state of the nanowires are characterized by SEM, TEM, EDS and XPS, and the electrochemical behaviors of the as-prepared phosphate biosensors are investigated by cyclic voltammogramic and chronoamperometric techniques. Especially, the influence of the composition and aspect ratio of Pt/Au alloy nanowire arrays on the response of phosphate biosensors are studied as well. The present phosphate biosensor shows a high sensitivity of 50.5 μA· cm-2 ·mM-1 and a wide linear range between 248 and 1456 μM toward the detection of phosphate. In addition, the biosensor also exhibits good selectivity and stability, which promises great potential in phosphate detection applications.
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U2 - 10.1149/2.0701503jes
DO - 10.1149/2.0701503jes
M3 - Article
AN - SCOPUS:84923366673
VL - 162
SP - B62-B67
JO - Journal of Electrochemical Society
JF - Journal of Electrochemical Society
SN - 0013-4651
IS - 3
ER -
