Journal
MICROCHIMICA ACTA
Volume 182, Issue 3-4, Pages 849-854Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-014-1397-0
Keywords
Electrodeposition; Three-dimensional assembly; Platinum spheres; Porous structure; Glucose sensor
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MEST) [2012R1A1A2041671]
- Ministry of Education (MOE)
- NRF through the Human Resource Training Project for Regional Innovation [2012H1B8A2026112]
- National Research Foundation of Korea [2012R1A1A2041671, 2012H1B8A2026112] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We report on a method of single-step electrodeposition of three-dimensionally (3-D) assembled Pt spheres on a gold-coated silicon wafer. The 3-D interconnected Pt spheres could be electrodeposited by applying a negative potential (-0.8 V, vs. Ag/AgCl) in neutral electrolytes containing KClO4. The application of such a negative potential is not possible in acidic solutions because of the formation of hydrogen. Scanning electron microscopy revealed that the seed Pt particles first grew to a certain size, and then form Pt spheres interconnected in multiple layers. The resulting 3-D assembled Pt sphere structures warrants a high surface area, and this property was utilized for the selective and sensitive amperometric determination of glucose at a working potential of 0.4 V (vs. Ag/AgCl), at near neutral pH values and in the presence of 0.1 M chloride. This straightforward method for the fabrication of 3-D assembled Pt sphere structures offers new opportunities for electroanalytical and electrocatalytic sensing based on porous Pt surfaces.
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