Journal
NANOPHOTONICS
Volume 4, Issue 3, Pages 269-276Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2015-0017
Keywords
refractory plasmonics; plasmonic heating; photothermal effect; photodynamic therapy; hot electrons; photocatalysis
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Funding
- ONR-MURI [N00014-10-1-0942]
- ARO [57981-PH (W911NF-11-1-0359)]
- NSF MRSEC [DMR-1120923]
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Optical properties of colloidal plasmonic titanium nitride nanoparticles are examined with an eye on their photothermal and photocatalytic applications via transmission electron microscopy and optical transmittance measurements. Single crystal titanium nitride cubic nanoparticles with an average size of 50 nm, which was found to be the optimum size for cellular uptake with gold nanoparticles [1], exhibit plasmon resonance in the biological transparency window and demonstrate a high absorption efficiency. A self-passivating native oxide at the surface of the nanoparticles provides an additional degree of freedom for surface functionalization. The titanium oxide shell surrounding the plasmonic core can create new opportunities for photocatalytic applications.
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