PROBLEM TO BE SOLVED: To provide a water-soluble fluorescence label material which is capable of light emission in a near-infrared region suitable for in-vivo imaging with high efficiency and stably.SOLUTION: The present invention provides a fluorescence label material having a structure in which a block copolymer coats one or plurality of silicon nano crystal which includes a diamond structure and has its surface coated with a hydrocarbon film. By controlling the size of the silicon nano crystal, light is emitted in a near-infrared region with a high living body transmissivity with high efficiency.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】in-vivoイメージングに好適な近赤外域を高効率かつ安定して発光できる水溶性の蛍光標識材を提供する。 【解決手段】ダイヤモンド構造を有するとともに表面を炭化水素膜で被覆した一つまたは複数のシリコンナノ結晶をブロック共重合体で覆った構造を有する蛍光標識材が提供される。シリコンナノ結晶のサイズを調節することで、生体の透過性が高い近赤外域で高い効率で発光する。【選択図】図1
