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Metal Nanoparticle‐Loaded Mesoporous Carbon Nanoparticles: Electrical Contacting of Redox Proteins and Electrochemical Sensing Applications
Author(s) -
Trifonov Alexander,
TelVered Ran,
Fadeev Michael,
Cecconello Alessandro,
Willner Itamar
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201500183
Subject(s) - nanoparticle , electrode , glucose oxidase , electrochemistry , mesoporous material , materials science , horseradish peroxidase , redox , metal , chemical engineering , carbon fibers , inorganic chemistry , nanotechnology , chemistry , composite number , catalysis , biosensor , organic chemistry , enzyme , composite material , engineering , metallurgy
A new method to incorporate metal nanoparticles, NPs, into pores of mesoporous carbon nanoparticles, MPC NPs, is presented. MPC NPs loaded with metal ion solutions are capped with protein units. The electrochemical reduction of the pore‐entrapped ions, followed by digestion of the protein caps, yields metal NPs‐loaded MPC NPs electrodes. Pt NPs/MPC NPs electrodes are used for the electrocatalyzed reduction of O 2 or H 2 O 2 . Furthermore, the metal NPs electrically contact enzymes with the bulk electrodes, as demonstrated for glucose oxidase‐capped Pt NPs/MPC NPs electrodes that electrocatalyze glucose oxidation, and for horseradish peroxidase‐capped Au NPs/MPC NPs electrodes, which electrocatalyze H 2 O 2 reduction.