Composite material including nanocrystals and methods of making
AssigneeMassachusetts Institute of Technology
InventorsMoungi G. Bawendi, Vikram C. Sundar
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Abstract
Temperature-sensing compositions can include an inorganic material, such as a semiconductor nanocrystal. The nanocrystal can be a dependable and accurate indicator of temperature. The intensity of emission of the nanocrystal varies with temperature and can be highly sensitive to surface temperature. The nanocrystals can be processed with a binder to form a matrix, which can be varied by altering the chemical nature of the surface of the nanocrystal. A nanocrystal with a compatibilizing outer layer can be incorporated into a coating formulation and retain its temperature sensitive emissive properties.
Claims12
A composite comprising a plurality of semiconductor nanocrystals incorporated in a binder including a matrix, wherein an outer surface of at least one nanocrystal includes a compound that includes a moiety that reacts with a component of the matrix, or is incorporated into the matrix;
- the binder includes an inorganic matrix;
- the semiconductor nanocrystals include a first semiconductor material selected from ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, HgS, HgTe, AlN, AlP, AlAs, AlSb, GaN, GaP, GaSb, InN, InP, InSb, TlN, TlP, TlSb and mixtures thereof;
- and the semiconductor nanocrystals include an overcoating including a second semiconductor material.
A method of making a composite, comprising:
- providing a semiconductor nanocrystal including a first compound on an outer surface of the nanocrystal, wherein the compound includes a reactive moiety;
- and
- reacting the first compound with a second compound to form an inorganic matrix.
A composite comprising a plurality of semiconductor nanocrystals incorporated in a binder including a matrix, wherein an outer surface of at least one nanocrystal includes a compound that includes a moiety that reacts with a component of the matrix, or is incorporated into the matrix;
- wherein the binder includes an inorganic matrix, and at least one semiconductor nanocrystal includes a first semiconductor material and an overcoating including a second semiconductor material.
Dependencies are inferred from the claim text.