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Synthesis and enhanced electrochemical properties of pod-shaped gold/silica nanoparticles |
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| Authors: | Cui Ye Qingcheng Kong Rong Wu Zhiwu Chen Aiqing Li |
| Affiliation: | a College of Chemistry and Chemical Engineering and College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P.R. China b Key Lab. for Organ Failure Research, Education Ministry of P.R China, Southern Medical University, Southern Medical University, Guangzhou 510515, P.R. China c Key Laboratory of Low-Dimensional Materials & Application Technology of the Ministry of Education, Xiangtan University, Xiangtan 411105, P.R. China d State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P.R. China |
| Abstract: | Pod-shaped gold/silica nanoparticles (PGSNPs) were prepared using perfluorooctanoic acid (PFOA) and cetyltrimethylammonium bromide (CTAB) as cotemplates. The PGSNPs were utilized to explore a novel biosensor through coupling myoglobin (Mb) with chitosan (Chi). Compared with Mb-Chi-PSNPs (pod-shaped silica nanoparticles)/GC modified electrode, Mb-Chi-PGSNPs/GC electrode exhibited a pair of much stronger redox peaks at − 0.28 V (vs. Ag/AgCl). Moreover, facilitated direct electron transfer of the metalloenzymes with smaller peak-to-peak separation (ΔEp) of about 46 mV was acquired on the PGSNPs-based enzyme electrode. The PGSNPs-based biosensor demonstrated significant electrocatalytic activity for the reduction of hydrogen peroxide with a wide linear range (1-540 µM) and high sensitivity (661 mA cm− 2 M− 1). Together, the Mb-Chi-PGSNPs film is one of ideal candidate materials for direct electrochemistry of redox proteins, and may find potential applications in biomedical, food, and environmental analysis and detection. |
| Keywords: | Metal and semiconductor Nanomaterials Synthesis Rod shape Electrochemistry Sensors |
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