Patent ID: 8247795

Claim:
A method of preparing interfused nanocrystals, comprising: (a) forming a first nanocrystal; (b) growing a second nanocrystal comprising a material different from that of the first nanocrystal on a surface of the first nanocrystal formed in (a); and (c) forming an alloy layer at an interface between the first nanocrystal and the second nanocrystal through diffusion; wherein each of (b) and (c) is conducted at 120° C. to 390° C. for a time period of 1 minute to 2 hours; and wherein an emission wavelength of the interfused nanocrystal is shifted into a blue light range; wherein the first and second nanocrystals are selected from the group consisting of Group II-VI semiconductor compounds, Group III-V semiconductor compounds, Group IV-VI semiconductor compounds, and mixtures thereof; and wherein the semiconductor compounds are selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, PbS, PbSe, PbTe, AlN, AlP, AlAs, GaN, GaP, GaAs, InN, InP, InAs, or mixtures thereof; the nanocrystal so formed having a total particle size of up to about 5 nm; wherein a metal precursor used in (b) has a concentration of 0.001 M to 2 M.