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YOUR PRIVACY, YOUR CHOICE We use essential cookies to make sure the site can function. We, and our 208 partners, also use optional cookies and similar technologies for advertising, personalisation of content, usage analysis, and social media. By accepting optional cookies, you consent to allowing us and our partners to store and access personal data on your device, such as browsing behaviour and unique identifiers. Some third parties are outside of the European Economic Area, with varying standards of data protection. See our privacy policy for more information on the use of your personal data. Your consent choices apply to nature.com and applicable subdomains. You can find further information, and change your preferences via 'Manage preferences'. You can also change your preferences or withdraw consent at any time via 'Your privacy choices', found in the footer of every page. 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Advertisement * View all journals * Search SEARCH Search articles by subject, keyword or author Show results from All journals This journal Search Advanced search QUICK LINKS * Explore articles by subject * Find a job * Guide to authors * Editorial policies * Log in * Explore content EXPLORE CONTENT * Research articles * News * Opinion * Research Analysis * Careers * Books & Culture * Podcasts * Videos * Current issue * Browse issues * Collections * Subjects * Follow us on Facebook * Follow us on Twitter * Subscribe * Sign up for alerts * RSS feed * About the journal ABOUT THE JOURNAL * Journal Staff * About the Editors * Journal Information * Our publishing models * Editorial Values Statement * Journal Metrics * Awards * Contact * Editorial policies * History of Nature * Send a news tip * Publish with us PUBLISH WITH US * For Authors * For Referees * Language editing services * Submit manuscript * Subscribe * Sign up for alerts * RSS feed 1. nature 2. articles 3. article * Article * Published: 24 April 2024 GROWTH OF DIAMOND IN LIQUID METAL AT 1 ATM PRESSURE * Yan Gong ORCID: orcid.org/0000-0001-6644-69941,2, * Da Luo ORCID: orcid.org/0000-0002-9128-67821, * Myeonggi Choe1,3, * Yongchul Kim1,2, * Babu Ram1, * Mohammad Zafari1, * Won Kyung Seong ORCID: orcid.org/0009-0004-8914-86221, * Pavel Bakharev ORCID: orcid.org/0000-0001-7458-68231, * Meihui Wang ORCID: orcid.org/0000-0001-5497-57091 nAff7, * In Kee Park2, * Seulyi Lee4, * Tae Joo Shin ORCID: orcid.org/0000-0002-1438-32985, * Zonghoon Lee1,3, * Geunsik Lee ORCID: orcid.org/0000-0002-2477-99902 & * … * Rodney S. Ruoff ORCID: orcid.org/0000-0002-6599-67641,2,3,6 Show authors Nature volume 629, pages 348–354 (2024)Cite this article * 13k Accesses * 496 Altmetric * Metrics details ABSTRACT Natural diamonds were (and are) formed (thousands of million years ago) in the upper mantle of Earth in metallic melts at temperatures of 900–1,400 °C and at pressures of 5–6 GPa (refs. 1,2). Diamond is thermodynamically stable under high-pressure and high-temperature conditions as per the phase diagram of carbon3. Scientists at General Electric invented and used a high-pressure and high-temperature apparatus in 1955 to synthesize diamonds by using molten iron sulfide at about 7 GPa and 1,600 °C (refs. 4,5,6). There is an existing model that diamond can be grown using liquid metals only at both high pressure and high temperature7. Here we describe the growth of diamond crystals and polycrystalline diamond films with no seed particles using liquid metal but at 1 atm pressure and at 1,025 °C, breaking this pattern. Diamond grew in the subsurface of liquid metal composed of gallium, iron, nickel and silicon, by catalytic activation of methane and diffusion of carbon atoms into and within the subsurface regions. We found that the supersaturation of carbon in the liquid metal subsurface leads to the nucleation and growth of diamonds, with Si playing an important part in stabilizing tetravalently bonded carbon clusters that play a part in nucleation. Growth of (metastable) diamond in liquid metal at moderate temperature and 1 atm pressure opens many possibilities for further basic science studies and for the scaling of this type of growth. Access through your institution Buy or subscribe This is a preview of subscription content, access via your institution ACCESS OPTIONS Access through your institution Access through your institution Change institution Buy or subscribe Access Nature and 54 other Nature Portfolio journals Get Nature+, our best-value online-access subscription 24,99 € / 30 days cancel any time Learn more Subscribe to this journal Receive 51 print issues and online access 199,00 € per year only 3,90 € per issue Learn more Buy this article * Purchase on Springer Link * Instant access to full article PDF Buy now Prices may be subject to local taxes which are calculated during checkout ADDITIONAL ACCESS OPTIONS: * Log in * Learn about institutional subscriptions * Read our FAQs * Contact customer support Fig. 1: Synthesis of diamond on a liquid metal surface that is at an interface with graphite. Fig. 2: Characterization of 13C-labelled as-grown diamond. Fig. 3: TEM data of cross-sectional samples prepared by SEM-FIB. SIMILAR CONTENT BEING VIEWED BY OTHERS DIAMOND GROWTH FROM ORGANIC COMPOUNDS IN HYDROUS FLUIDS DEEP WITHIN THE EARTH Article Open access 30 October 2019 THE COMPOSITION OF THE FLUID PHASE IN INCLUSIONS IN SYNTHETIC HPHT DIAMONDS GROWN IN SYSTEM FE–NI–TI–C Article Open access 24 January 2022 RARE-EARTH METAL CATALYSTS FOR HIGH-PRESSURE SYNTHESIS OF RARE DIAMONDS Article Open access 19 April 2021 DATA AVAILABILITY The published data of this study are available on the Zenodo public database at https://doi.org/10.5281/zenodo.10803625 (ref. 58). Source data are provided with this paper. REFERENCES 1. Haggerty, S. E. Diamond genesis in a multiply-constrained model. Nature 320, 34–38 (1986). Article ADS CAS Google Scholar 2. Pal’yanov, Y. N., Sokol, A. G., Borzdov, Y. M., Khokhryakov, A. F. & Sobolev, N. V. Diamond formation from mantle carbonate fluids. Nature 400, 417–418 (1999). Article ADS Google Scholar 3. Bundy, F. 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Article ADS CAS Google Scholar 54. Frenkel, D. & Smit, B. Understanding Molecular Simulation: From Algorithms to Applications (Academic Press, 1996). 55. Sharma, B. D. & Donohue, J. A refinement of the crystal structure of gallium. Z. Kristallogr. Cryst. Mater. 117, 293–300 (1962). Article CAS Google Scholar 56. Assael, M. J. et al. Reference data for the density and viscosity of liquid cadmium, cobalt, gallium, indium, mercury, silicon, thallium, and zinc. J. Phys. Chem. Ref. Data 41, 033101 (2012). Article ADS Google Scholar 57. Cohen, J. Statistical Power Analysis for the Behavioral Sciences (Academic Press, 2013). 58. Yan, G., Da, L. & Rodney, R. Source data for “Growth of diamond in liquid metal at 1 atmosphere pressure”. Zenodo https://doi.org/10.5281/zenodo.10803625 (2024). Download references ACKNOWLEDGEMENTS This work was supported by the Institute for Basic Science (IBS-R019-D1). We thank S. Y. Lee for preliminary XRD measurements at the 9C beamline of Pohang Accelerator Laboratory to evaluate the crystalline property of the diamond sample, and B. Cunning for suggesting the EDM-3 Poco Graphite sheet material and for discussions. The experiments at the PLS-II 6D and 9 C beamline were supported in part by MSIT, POSTECH and UNIST Central Research Facilities. We thank K.-S. Lee of the UNIST Center Research Facilities for making the TOF-SIMS measurements. The DFT calculations were conducted on the IBS supercomputer. AUTHOR INFORMATION Author notes 1. Meihui Wang Present address: State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, China AUTHORS AND AFFILIATIONS 1. Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan, Republic of Korea Yan Gong, Da Luo, Myeonggi Choe, Yongchul Kim, Babu Ram, Mohammad Zafari, Won Kyung Seong, Pavel Bakharev, Meihui Wang, Zonghoon Lee & Rodney S. Ruoff 2. Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea Yan Gong, Yongchul Kim, In Kee Park, Geunsik Lee & Rodney S. Ruoff 3. Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea Myeonggi Choe, Zonghoon Lee & Rodney S. Ruoff 4. UNIST Central Research Facilities (UCRF), Ulsan National University of Science and Technology (UNIST), Ulsan, Republic of Korea Seulyi Lee 5. Graduate School of Semiconductor Materials and Devices Engineering, Ulsan National University of Science and Technology (UNIST), Ulsan, Republic of Korea Tae Joo Shin 6. School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea Rodney S. Ruoff Authors 1. Yan Gong View author publications You can also search for this author in PubMed Google Scholar 2. Da Luo View author publications You can also search for this author in PubMed Google Scholar 3. Myeonggi Choe View author publications You can also search for this author in PubMed Google Scholar 4. Yongchul Kim View author publications You can also search for this author in PubMed Google Scholar 5. Babu Ram View author publications You can also search for this author in PubMed Google Scholar 6. Mohammad Zafari View author publications You can also search for this author in PubMed Google Scholar 7. Won Kyung Seong View author publications You can also search for this author in PubMed Google Scholar 8. Pavel Bakharev View author publications You can also search for this author in PubMed Google Scholar 9. Meihui Wang View author publications You can also search for this author in PubMed Google Scholar 10. In Kee Park View author publications You can also search for this author in PubMed Google Scholar 11. Seulyi Lee View author publications You can also search for this author in PubMed Google Scholar 12. Tae Joo Shin View author publications You can also search for this author in PubMed Google Scholar 13. Zonghoon Lee View author publications You can also search for this author in PubMed Google Scholar 14. Geunsik Lee View author publications You can also search for this author in PubMed Google Scholar 15. Rodney S. Ruoff View author publications You can also search for this author in PubMed Google Scholar CONTRIBUTIONS R.S.R. supervised the project. R.S.R., D.L. and Y.G. conceived the experiments. Y.G. did the growth experiments. Y.G. and D.L. characterized the diamond samples. W.K.S. designed, assembled and built, and tested the cold-wall system and the thermocouple probe array. M.C. and Z.L. took the TEM, STEM, EELS and EDS measurements. P.B. took the XPS measurements. T.J.S. and S.L. took the XRD measurements. Y.K., B.R., M.Z., I.K.P. and G.L. performed the theoretical calculations. M.W. contributed through discussion. Y.G. wrote a draft manuscript and R.S.R., D.L. and Y.G. revised it. All co-authors commented on the manuscript before its submission. CORRESPONDING AUTHORS Correspondence to Da Luo, Won Kyung Seong or Rodney S. Ruoff. ETHICS DECLARATIONS COMPETING INTERESTS The Institute for Basic Science has filed a patent application (KR 10-2023-0052752) that lists Y.G., D.L. and R.S.R. as inventors. Other than this, the authors declare no competing interests. PEER REVIEW PEER REVIEW INFORMATION Nature thanks Anirudha Sumant and the other, anonymous, reviewer(s) for their contribution to the peer review of this work. Peer reviewer reports are available. 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Nature 629, 348–354 (2024). https://doi.org/10.1038/s41586-024-07339-7 Download citation * Received: 12 May 2023 * Accepted: 20 March 2024 * Published: 24 April 2024 * Issue Date: 09 May 2024 * DOI: https://doi.org/10.1038/s41586-024-07339-7 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable link Sorry, a shareable link is not currently available for this article. Copy to clipboard Provided by the Springer Nature SharedIt content-sharing initiative SUBJECTS * Materials chemistry * Structural materials * Synthesis and processing COMMENTS By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate. Access through your institution Buy or subscribe Access through your institution Change institution Buy or subscribe * Sections * Figures * References * Abstract * Data availability * References * Acknowledgements * Author information * Ethics declarations * Peer review * Additional information * Supplementary information * Source data * Rights and permissions * About this article * Comments Advertisement * Fig. 1: Synthesis of diamond on a liquid metal surface that is at an interface with graphite. * Fig. 2: Characterization of 13C-labelled as-grown diamond. * Fig. 3: TEM data of cross-sectional samples prepared by SEM-FIB. 1. Haggerty, S. E. Diamond genesis in a multiply-constrained model. Nature 320, 34–38 (1986). Article ADS CAS Google Scholar 2. Pal’yanov, Y. N., Sokol, A. G., Borzdov, Y. M., Khokhryakov, A. F. & Sobolev, N. V. Diamond formation from mantle carbonate fluids. Nature 400, 417–418 (1999). Article ADS Google Scholar 3. Bundy, F. P. et al. 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