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US 10,226,406 B2Granted
Light attenuating formulations
AssigneesAdámas Nanotechnologies, Inc., International Technology Center
InventorsOlga Aleksandrovna Shenderova, Varvara Grichko
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Abstract
A preparation provides light or radiation attenuation between about 190 and 800 nm has an amount of diamond nanoparticles in a medium, where the diamond nanoparticles have a size between about 1 nm and 1000 nm are modified to enhance absorption or photoluminescence. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
Claims35
A preparation, comprising:
- a carrier medium containing a dispersion of diamond nanoparticles, where a plurality of the diamond nanoparticle are of a size between about 1 nm and slightly larger than 1000 nm;
- and where at least a portion of the diamond nanoparticles comprise modified diamond nanoparticles that are modified to enhance absorption and photoluminescence when exposed to excitation light with a wavelength between approximately 190 and 800 nm, where the diamond nanoparticles are modified to increase structural defects;
- the modifications comprising at least one of N-V centers, defect centers due to dopant atoms, self-interstitials, vacancies, complexes of the above, complexes of charged defects, and dislocations that cause absorption and photoluminescence.
A radiation attenuating preparation, comprising:
- a dispersion of diamond nanoparticles in a carrier medium, where a plurality of the diamond nanoparticle comprise a size between about 1 nm and slightly larger than 1000 nanometers;
- where at least a portion of the diamond nanoparticles comprise:
- first modified diamond nanoparticles that are modified by doping to create color centers;
- and second modified diamond nanoparticles that are modified to exhibit enhanced absorption and enhanced photoluminescence of radiation compared to unmodified diamond nanoparticles when exposed to excitation light of wavelength between approximately 190 and 800 nm, where the second modified diamond nanoparticles comprise diamond nanoparticles that are modified by:
- electron, ion or gamma-ray irradiation of the diamond nanoparticles;
- and annealing of the irradiated diamond nanoparticles.
3 more elements
A light attenuating preparation, comprising:
- an effective amount of diamond nanoparticles in a carrier medium, where a plurality of the diamond nanoparticle comprise a size greater than about 1 nm and less than about one micron;
- where the diamond nanoparticles provide transmission attenuating properties for radiation having an excitation wavelength between approximately 190 and 800 nm;
- and where at least a portion of the diamond nanoparticles comprise modified diamond nanoparticles that are modified to exhibit internal defects or color centers within the diamond nanoparticles.
Dependencies are inferred from the claim text.