| 摘要 |
Organic nanoparticles are provided to have a sharp particle size distribution peak and produce an organic nanoparticle dispersion composition having good stability, dispersibility, and flowability. Organic nanoparticles are formed of an organic material, and have a number average particle diameter of 50 nm or smaller and a (volume average particle diameter)/(number average particle diameter) ratio of 1.0-2.0. The organic material is an organic pigment selected from the group consisting of azo-based pigments, phthalocyanine-based pigments, quinacridone-based pigments, indoline-based pigments, cyanine-based pigments, merocyanine-based pigments, fullerene-based pigments, polycyclic aromatic pigments, and polydiacetylene-based pigments.
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