title: Electrochemical deposition of Pt nanoparticles on carbon nanotube patterns for glucose detection.
abstract: Single-walled carbon nanotube (SWCNT) microarrays are successfully patterned on SiO(2) substrates based on an evaporation-induced self-assembly mechanism. On these SWCNT micropatterns, the highly electroactive polycrystalline Pt nanoparticles (PtNPs) are deposited by using the electrochemical method. The obtained PtNP-SWCNT nanocomposites exhibit a low detection limit for hydrogen peroxide (4 microM). The further investigation on a glucose oxidase (GOx)/BSA/PtNP-SWCNT based biosensor indicates that the detection limit and sensitivity for glucose are 0.04 mM and 4.54 microA mM(-1) cm(-2), respectively. Our results prove that the improved electrocatalytic activity originates from the PtNP-SWCNT micropatterns, which provide a potential platform to immobilize different enzymes used for bioelectrochemical applications.
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Zeng
authors.forename: Xiaozhu
authors.initials: X
authors.lastname: Zhou
authors.forename: Xiao
authors.initials: X
authors.lastname: Huang
authors.forename: Zhijuan
authors.initials: Z
authors.lastname: Wang
authors.forename: Yanli
authors.initials: Y
authors.lastname: Yang
authors.forename: Qichun
authors.initials: Q
authors.lastname: Zhang
authors.forename: Freddy
authors.initials: F
authors.lastname: Boey
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
mesh_terms: D055162:Biocatalysis; D015374:Biosensing Techniques / Q000379:methods; D055664:Electrochemical Techniques / Q000379:methods*; D005947:Glucose / Q000032:analysis*; D005949:Glucose Oxidase / Q000737:chemistry / Q000378:metabolism; D053768:Metal Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D010984:Platinum; D005949:Glucose Oxidase; D005947:Glucose