公开(公告)号：US20210371742A1

公开(公告)日：2021-12-02

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 ,  C23C14/48 ,  C23C14/06 ,  C23C14/58 ,  C01B32/28 ,  C01B32/26

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.