A self-illuminating, flexible sheath includes a distal end, a proximal end, and a lumen extending from the proximal end to the distal end. The flexible sheath includes a self-luminating feature. The flexible sheath is configured to be received by a working channel of an endoscope.

A self-illuminating, flexible sheath includes a distal end, a proximal end, and a lumen extending from the proximal end to the distal end. The flexible sheath includes a self-luminating feature. The flexible sheath is configured to be received by a working channel of an endoscope.

Provided are a wavelength conversion member including: a quantum dot phosphor; a white pigment including an organic substance layer that contains an organic substance, on at least a part of a surface of the white pigment; and a resin cured product including the quantum dot phosphor and the white pigment.

A process of synthesizing GaSe nanocrystals is provided, the process including: contacting a first precursor containing gallium with a second precursor containing selenium to obtain a GaSe single precursor; and reacting the GaSe single precursor in a solvent in the presence of a ligand compound, and optionally with a third precursor including an element (A) other than gallium and selenium, to prepare a GaSe nanocrystal represented by Chemical Formula 1:
GaSe.sub.xA.sub.y[Chemical Formula 1] wherein x is about 1.1 to 3, and y is about 0.1 to 4.

A process of synthesizing GaSe nanocrystals is provided, the process including: contacting a first precursor containing gallium with a second precursor containing selenium to obtain a GaSe single precursor; and reacting the GaSe single precursor in a solvent in the presence of a ligand compound, and optionally with a third precursor including an element (A) other than gallium and selenium, to prepare a GaSe nanocrystal represented by Chemical Formula 1:
GaSe.sub.xA.sub.y[Chemical Formula 1] wherein x is about 1.1 to 3, and y is about 0.1 to 4.

A multi-compartment microcapsule emits photons when subjected to a stimulus. In some embodiments, the multi-compartment microcapsules have first and second compartments separated by an isolating structure adapted to rupture in response to the stimulus, wherein the first and second compartments contain reactants that come in contact and react to produce photons when the isolating structure ruptures.

A multi-compartment microcapsule emits photons when subjected to a stimulus. In some embodiments, the multi-compartment microcapsules have first and second compartments separated by an isolating structure adapted to rupture in response to the stimulus, wherein the first and second compartments contain reactants that come in contact and react to produce photons when the isolating structure ruptures.

A self-healing polymeric material includes a polymeric matrix material, wherein dispersed within the polymeric matrix material is a mixture of materials that includes monomers and a photoinitiator, and a plurality of light generating microcapsules dispersed in the polymeric matrix material. Each light generating microcapsule encapsulates multiple reactants that undergo a chemiluminescent reaction. The chemiluminescent reaction generates a photon having a wavelength within a particular emission range that is consistent with an absorption range of the photoinitiator.

A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm or more and 490 nm or less, and a red fluorescent material which is excited by the light from the light emitting element to emit light having at least one light emission peak wavelength in a range of 580 nm or more and 680 nm or less, wherein a ratio of the photon flux R of red light in a range of 620 nm or more and 700 nm or less to the photon flux B of blue light in a range of 400 nm or more and 490 nm or less, R/B, is in a range of more than 20 and 200 or less.

A scintillator comprises a sintered body having a volume of 1 mm.sup.3 or less. The sintered body includes a crystal region of a rare earth oxysulfide. The number of polycrystal bodies each having a different composition from that of the crystal region is 200 or less per a unit area of 100 m100 m of a cross section of the sintered body.