Light emitter, method for producing light emitter, and biological substance labeling agent
A light emitter is formed from nanoparticles including a compound semiconductor containing an Ag component, In component, and Se component. The peak wavelength of the emission intensity falls within the range of 700 to 1400 nm, and the half-value width ΔH for the peak wavelength is 100 nm or less. The light emitted is configured to emit strong light in the near-infrared region, and which is capable of detecting biological information, and is preferred for bioimaging.
1. A light emitter for labeling a biological substance, the light emitter comprising:
nanoparticles composed of a compound semiconductor that contains an Ag compound, an In component, and a Se component,
wherein the compound semiconductor is a light-emitting material that emits light at an emission intensity having a peak wavelength within a range between 700 nm and 1400 nm, and
wherein a mixing ratio of the In component to the Ag component is between 2 and 3 in terms of molar ratio, such that the light-emitting material is constructed to emit light at the emission intensity having the peak wavelength that is 85 nm or less in half-value width.
2. The light emitter according to claim 1 , wherein the peak wavelength is between 700 nm and 1000 nm.
3. The light emitter according to claim 1 , wherein the compound semiconductor contains the In component in excess with respect to the stoichiometric composition of the compound semiconductor.
4. The light emitter according to claim 1 , wherein the emitted light comprises an absorption wavelength with at least a portion between 700 nm and 1000 nm.
5. The light emitter according to claim 1 , wherein the compound semiconductor has an average particle size between 0.1 nm and 20 nm.
6. A biological substance labeling agent comprising the light emitter according to claim 1 .