| 학회 | 한국공업화학회 |
| 학술대회 | 2018년 봄 (05/02 ~ 05/04, 대구 엑스코(EXCO)) |
| 권호 | 22권 1호 |
| 발표분야 | 무기재료_포스터 |
| 제목 | 3D reconstruction of single nanoparticle and structure analysis in atomic resolution |
| 초록 | Understanding structure of nanoparticles is important because their structures determine physical, chemical, and catalytic properties. However, there is no right tool to map 3D structures of nanoparticles with details of atomic positions in the native liquid condition. Our method based on high-resolution liquid cell TEM has been developed to reconstruct the 3D structures of colloidal nanoparticles. When Pt nanoparticles are immersed in graphene liquid cell, the freely rotating nanoparticles can be observed by high-resolution TEM. Time-series TEM images capture two-dimensional projections of the rotating particle from different directions. Using reconstruction algorithm, 2D projections can be merged to 3D structure map of individual nanoparticle with angstrom spatial resolution. Obtained 3D density maps unveil face-centered cubic structured Pt nanoparticles with distortions, grain boundaries, and strains applied along particular directions. |
| 저자 | 김성인1, 허준영1, 김병효2, 박정원1 |
| 소속 | 1서울대, 2기초과학(연) |
| 키워드 | 3D reconstruction; Nanoparticle; Structure analysis; Atomic position; Atomic resolution |
