Patent ID: 7829609

Claim:
A composition comprising an organic crystal having a minor axis length of from 3 to 100 nm and a major axis length of from 10 to 2,000 nm and a matrix material, wherein the organic crystal satisfies at least one of the following requirements (1) to (4): (1) a surfactant is adsorbed on the organic crystal; (2) an inorganic ion is adsorbed on the organic crystal; (3) one or more inorganic compounds selected from the group consisting of silicon oxide, titanium oxide, aluminum oxide, zirconium oxide, barium oxide and hydroxyapatite are bonded with the organic crystal; and (4) the organic crystal is modified with a group represented by the following formula (1): wherein L 1 represents a connecting group represented by any one of the following formulae (2) to (21); n represents an integer of from 0 to 4; when n represents an integer of from 2 to 4, L 1 s in the number of n may be the same or different; and R 1 represents an organic group: wherein R 2 in the formula (11), R 3 in the formula (13), R 4 in the formula (17) and R 5 in the formula (21) each independently represents an organic group.