Frontiers of Engineering Reports on Leading-Edge Engineering from the 2015 Symposium (2016) / Chapter Skim
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Catching Light Rays: Refractory Plasmonics for Energy Conversion, Data Storage, and Medical Applications--Alexandra Boltasseva and Urcan Guler
Catching Light Rays: Refractory Plasmonics for Energy Conversion, Data Storage, and Medical Applications--Alexandra Boltasseva and Urcan Guler
Pages 105-112
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From page 105... ...
The influence of optical technologies on the development of modern society cannot be overestimated. From conventional mirrors, lenses, microscopes, telescopes, optical sensors, and high-precision measurement systems to lasers, fiberoptic communications, and optical data storage systems, optical instruments have enabled revolutionary advances and novel concepts in many disciplines, including astronomy, manufacturing, chemistry, biology (particularly bio- and chemical sensors)
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From page 106... ...
PLASMONIC CONSTITUENT MATERIALS: CHALLENGES It is now possible to design plasmonic structures and metamaterials -- rtificial a composite surfaces or materials that use plasmonic building blocks as their functional unit cells -- with versatile properties that can be tailored to fit almost any practical need. But new plasmonic technologies will require the resolution of significant limitations associated with the use of metals as constituent materials.
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From page 107... ...
have hindered STPV progress because of low melting points for noble metals, poor optical performance, and lattice imperfections for refractory metals. Refractory plasmonic ceramics such as TiN represent a unique platform for realizing STPV as an energy conversion concept that promises efficiencies of up to 85 percent (Guler et al.
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From page 108... ...
Hyperthermia is known to induce cell death in diseased and other tissues and has been shown to increase both local control of treatment and overall survival in combination with radiotherapy and chemotherapy in randomized clinical trials. Gold nanoparticles are emerging as promising agents for cancer therapy and are being investigated as drug carriers, photothermal agents, contrast agents, and radiosensitizers.
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From page 109... ...
shows a high-resolution transmission electron microscope image and optical transmittance data from a colloidal single crystalline TiN sample. Lattice parameters of the nanoparticle closely match the tabulated single rystalline c bulk values of TiN samples, and the optical transmittance data show the plasmonic extinction dip at the biological transparency window.
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From page 110... ...
nanoparticle closely match calculated values from bulk TiN samples. The graph below shows the transmittance data from a colloidal TiN sample with a plasmonic extinction dip at the biological transmittance window.
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From page 111... ...
As such, they are promising building blocks for advanced optical technologies, including data processing, exchange, and storage; new concepts for energy conversion, including improved solar cells; nanoscaleresolution imaging techniques; a new generation of cheap, enhanced-sensitivity sensors; and novel types of light sources. REFERENCES Bauer T
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From page 112... ...
2014. Refractory plasmonics with titanium nitride: Broadband metamaterial absorber.
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