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Au@SnO 2 Core–Shell Nanocapacitors
Author(s) -
Oldfield G.,
Ung T.,
Mulvaney P.
Publication year - 2000
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200010)12:20<1519::aid-adma1519>3.0.co;2-w
Subject(s) - materials science , capacitance , supercapacitor , semiconductor , plasmon , nanotechnology , nanoparticle , optoelectronics , colloid , shell (structure) , core (optical fiber) , metal , layer (electronics) , redox , chemical engineering , electrode , composite material , metallurgy , chemistry , engineering
The reproducible synthesis of metal–semiconductor core–shell nanoparticles consisting of 15 nm gold colloids homogeneously coated with a 10 nm layer of SnO 2 is reported (see Figure). The surface plasmon band is drastically red‐shifted from 521 to 542 nm. These materials display a high electrical capacitance and slow discharge rates in solution, indicating potential applications as electro‐optical switches, supercapacitors, and redox catalysts.