大型放射光施設 SPring-8

Speaker: Prof. Rodney S. Ruoff

Language: English

Affiliation: Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan, Republic of Korea
　　　　　　Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea

Title: Studies of Carbon Materials

Abstract:
We present dissolution of single crystal diamond at the interface with single crystal, epitaxial thin films of Co and Ni. This is the first measurement ^[1] of the activation enthalpy of C-C bond breaking at such metal interfaces by measurements of the kinetics of dissolution for single crystal diamond pieces with, respectively, (100) and (110) surface orientation; note that the (111) surface does not dissolve. We have discovered a new method of growing diamond, in liquid metal at 1 atm or lower pressure, and I briefly describe this. ^[2]
We next discuss several new ways to introduce C (and/or B and/or N) atoms into liquid metals in which each of C, B, or N is normally insoluble ^[3], or partially soluble and discuss some new research direction for synthesis of carbon-based materials in liquid metals. Support from the Institute for Basic Science is appreciated.

[1] Yunqing Li, Yongchul Kim, Pavel V. Bakharev, Won Kyung Seong, Chohee Hyun, Dulce C. Camacho-Mojica, Liyuan Zhang, Benjamin V. Cunning, Tae Joo Shin, Geunsik Lee, and Rodney S. Ruoff. Dissolving diamond:
kinetics of the dissolution of (100) and (110) single crystals in nickel and cobalt films. Chemistry of Materials. 34(6): 2599-2611, (2022).
[2]. Yan Gong, Da Luo, Myeonggi Choe, Yongchul Kim, Babu Ram, Mohammad Zafari, Won Kyung Seong, Pavel Bakharev, Meihui Wang, In Kee Park, Seulyi Lee, Tae Joo Shin, Zonghoon Lee, Geunsik Lee, Rodney Ruoff.
Growth of diamond in liquid metal at 1 atmosphere pressure. Research Square Nature, 629, 348-354 (2024).
[3]. Rodney S. Ruoff. Delivering C, B, and N Atoms into Liquid Metals in Which They Are Normally Insoluble. Nano Lett. 24, 5, 1467–1470 (2024).