公开(公告)号：US06251303B1

公开(公告)日：2001-06-26

申请号：US09156863

申请日：1998-09-18

Applicant: Moungi G. Bawendi ,  Frederick V. Mikulec ,  Jin-Kyu Lee

Inventor： Moungi G. Bawendi ,  Frederick V. Mikulec ,  Jin-Kyu Lee

IPC: C09K1102

CPC classification number: C01B19/007 ,  B82Y15/00 ,  B82Y30/00 ,  C01P2004/64 ,  G01N33/533 ,  G01N33/588 ,  Y10T428/2991 ,  Y10T428/2998

Abstract: A water soluble semiconductor nanocrystal capable of light emission is provided, including a quantum dot having a selected band gap energy, a layer overcoating the quantum dot, the overcoating layer comprised of a material having a band gap energy greater than that of the quantum dot, and an organic outer layer, the organic layer comprising a compound having at least one linking group for attachment of the compound to the overcoating layer and at least one hydrophilic group spaced apart from the linking group by a hydrophobic region sufficient to prevent electron charge transfer across the hydrophobic region. The particle size of the nanocrystal core is in the range of about 12 Å to about 150 Å, with a deviation of less than 10% in the core. The coated nanocrystal exhibits photoluminescence having quantum yields of greater than 10% in water.

Abstract translation: 提供了能够发光的水溶性半导体纳米晶体，其包括具有选定的带隙能量的量子点，覆盖量子点的层，由具有大于量子点的带隙能量的材料构成的外涂层， 和有机外层，所述有机层包含具有至少一个连接基团的化合物，用于将化合物与外涂层连接，以及至少一个与连接基团间隔开的亲水基团通过足以防止电子电荷转移的疏水区域 疏水区域。 纳米晶核的粒径在约至的范围内，核心的偏差小于10％。 涂覆的纳米晶体显示在水中具有大于10％的量子产率的光致发光。