The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2021
Filed:
Mar. 01, 2018
National Institute for Materials Science, Tsukuba, JP;
Tadaaki Nagao, Tsukuba, JP;
Karuna Kar Nanda, Tsukuba, JP;
NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba, JP;
Abstract
The present invention has for its object to provide a composition in which a photoluminescent carbon nanoparticle having no dependency of an emission wavelength on an excitation wavelength and being enhanced in terms of quantum efficiency is dispersed, a process of producing the same, and an application of the same. The composition of the invention has a photoluminescent carbon nanoparticle dispersed in a water-soluble solvent. The photoluminescent carbon nanoparticle contains a carbon atom, an oxygen atom, a nitrogen atom, and a hydrogen atom if required. As shown in FIG., the photoluminescent carbon nanoparticle has an intensity of a C—N bond and/or C—O bond-derived peak (285.98 eV) larger than that of a C—C bond and/or C—H bond-derived peak (284.95 eV) in terms of X-ray photoelectron spectroscopic spectra, and a Raman spectrum having a peak based on a G-band and a D-band.