Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 6, Pages 2288-2291Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja500169y
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Funding
- NSF [DMR-1253231, CHE-1307319]
- USC
- National Basic Research Program of China [2011CB933502]
- NNSFC [21335004, 21121091]
- Chinese Scholarship Council
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1307319] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1253231] Funding Source: National Science Foundation
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We have discovered that magnetic Fe3O4 nanoparticles exhibit an intrinsic catalytic activity toward the electrochemical reduction of small dye molecules. Metallic nanocages, which act as efficient signal amplifiers, can be attached to the surface of Fe3O4 beads to further enhance the catalytic electrochemical signals. The Fe3O4@ nanocage core-satellite hybrid nanoparticles show significantly more robust electrocatalytic activities than the enzymatic peroxidase/H2O2 system. We have further demonstrated that these nonenzymatic nanoelectrocatalysts can be used as signal-amplifying nanoprobes for ultrasensitive electrochemical cytosensing.
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