公开(公告)号：US12012537B2

公开(公告)日：2024-06-18

申请号：US17319095

申请日：2021-05-13

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Seung Hee Han ,  Sung Ju Han ,  Min Seo ,  Min Gyeong Cho

IPC: C09K11/65 ,  B82B3/00 ,  B82Y20/00 ,  B82Y40/00 ,  C01B32/26 ,  C01B32/28 ,  C23C14/06 ,  C23C14/48 ,  C23C14/58 ,  C30B31/20 ,  C30B33/00 ,  G01N21/64

CPC classification number: C09K11/65 ,  B82B3/008 ,  C01B32/26 ,  C01B32/28 ,  C23C14/0611 ,  C23C14/48 ,  C23C14/5806 ,  C23C14/5853 ,  C30B31/20 ,  C30B33/00 ,  B82Y20/00 ,  B82Y40/00 ,  C01P2002/72 ,  C01P2002/86 ,  C01P2004/04 ,  C01P2004/64 ,  G01N2021/6439

Abstract: The present invention relates to a fluorescent nanodiamond preparing method including a first operation of preparing nanodiamonds having an average particle diameter of 10 nm or less, a second operation of implanting plasma ions into the nanodiamonds, a third operation of heat-treating the nanodiamonds implanted with the plasma ions under a vacuum or inert gas atmosphere, a fourth operation of oxygen treatment of the heat-treated nanodiamonds under a gas atmosphere including oxygen to oxidize the surfaces of the nanodiamonds, a fifth operation of acid-treating the oxygen-treated nanodiamonds, a sixth operation of centrifuging and cleaning the acid-treated nanodiamonds, and a seventh operation of drying the cleaned nanodiamonds, wherein, in the second operation, the plasma ions are implanted at an incident ion dose of 1013 ions/cm2 or more and 1020 ions/cm2 or less.