Ammonia pressure controls colloidal metal nitride synthesis in molten salts

Nakamura, S., Mukai, T. \& Senoh, M. Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes. Appl. Phys. Lett. 64, 1687–1689 (1994).

Article
ADS
CAS
Google Scholar
2. Amano, H. et al. The 2018 GaN power electronics roadmap. J. Phys. D Appl. Phys. 51, 163001 (2018).

Article
ADS
Google Scholar
3. Höhn, P. \& Niewa, R. in Handbook of Solid State Chemistry Part 1 (eds Dronskowski, R. et al.) 251–359 (Wiley, 2017).
4. Sun, W. et al. A map of the inorganic ternary metal nitrides. Nat. Mater. 18, 732–739 (2019).

Article
CAS
PubMed
Google Scholar
5. Gao, Z. et al. Shielding Pt/γ-Mo2N by inert nano-overlays enables stable H2 production. Nature 638, 690–696 (2025).

Article
ADS
CAS
PubMed
Google Scholar
6. Hashimoto, T., Wu, F., Speck, J. S. \& Nakamura, S. A GaN bulk crystal with improved structural quality grown by the ammonothermal method. Nat. Mater. 6, 568–571 (2007).

Article
CAS
PubMed
Google Scholar
7. Wang, D. et al. Ferroelectric YAlN grown by molecular beam epitaxy. Appl. Phys. Lett. 123, 033504 (2023).

Article
ADS
CAS
Google Scholar
8. Skidmore, C. H. et al. Proximity ferroelectricity in wurtzite heterostructures. Nature 637, 574–579 (2025).

Article
ADS
CAS
PubMed
Google Scholar
9. Talley, K. R. et al. Synthesis of LaWN3 nitride perovskite with polar symmetry. Science 374, 1488–1491 (2021).

Article
ADS
CAS
PubMed
Google Scholar
10. Kuykendall, T., Ulrich, P., Aloni, S. \& Yang, P. Complete composition tunability of InGaN nanowires using a combinatorial approach. Nat. Mater. 6, 951–956 (2007).

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Fix, R., Gordon, R. G. \& Hoffman, D. M. Chemical vapor deposition of titanium, zirconium, and hafnium nitride thin films. Chem. Mater. 3, 1138–1148 (1991).

Article
CAS
Google Scholar
12. Fix, R., Gordon, R. G. \& Hoffman, D. M. Chemical vapor deposition of vanadium, niobium, and tantalum nitride thin films. Chem. Mater. 5, 614–619 (1993).

Article
CAS
Google Scholar
13. Parvizian, M. \& De Roo, J. Precursor chemistry of metal nitride nanocrystals. Nanoscale 13, 18865–18882 (2021).

Article
CAS
PubMed
PubMed Central
Google Scholar
14. Yang, L. et al. Cation exchange in colloidal transition metal nitride nanocrystals. J. Am. Chem. Soc. 146, 12556–12564 (2024).

Article
ADS
CAS
PubMed
Google Scholar
15. Vaughn, D. D. II et al. Solution synthesis of Cu3PdN nanocrystals as ternary metal nitride electrocatalysts for the oxygen reduction reaction. Chem. Mater. 26, 6226–6232 (2014).

Article
CAS
Google Scholar
16. Shanker, G. S. \& Ogale, S. Faceted colloidal metallic Ni3N nanocrystals: size-controlled solution-phase synthesis and electrochemical overall water splitting. ACS Appl. Energy Mater. 4, 2165–2173 (2021).

Article
CAS
Google Scholar
17. Taylor, P. N. et al. Synthesis of widely tunable and highly luminescent zinc nitride nanocrystals. J. Mater. Chem. C 2, 4379–4382 (2014).

Article
CAS
Google Scholar
18. Talapin, D. V., Lee, J.-S., Kovalenko, M. V. \& Shevchenko, E. V. Prospects of colloidal nanocrystals for electronic and optoelectronic applications. Chem. Rev. 110, 389–458 (2010).

Article
CAS
PubMed
Google Scholar
19. García de Arquer, F. P. et al. Semiconductor quantum dots: technological progress and future challenges. Science 373, eaaz8541 (2021).

Article
PubMed
Google Scholar
20. Wang, H. et al. Transition metal nitrides for electrochemical energy applications. Chem. Soc. Rev. 50, 1354–1390 (2021).

Article
PubMed
Google Scholar
21. Xu, X. et al. Two-dimensional arrays of transition metal nitride nanocrystals. Adv. Mater. 31, 1902393 (2019).

Article
Google Scholar
22. Guy, K. et al. Original synthesis of molybdenum nitrides using metal cluster compounds as precursors: applications in heterogeneous catalysis. Chem. Mater. 32, 6026–6034 (2020).

Article
CAS
Google Scholar
23. Karaballi, R. A., Humagain, G., Fleischman, B. R. A. \& Dasog, M. Synthesis of plasmonic group-4 nitride nanocrystals by solid-state metathesis. Angew. Chem. Int. Ed. 58, 3147–3150 (2019).

Article
CAS
Google Scholar
24. Giordano, C., Erpen, C., Yao, W., Mike, B. \& Antonietti, M. Metal nitride and metal carbide nanoparticles by a soft urea pathway. Chem. Mater. 21, 5136–5144 (2009).

Article
CAS
Google Scholar
25. Murray, C. B., Norris, D. J. \& Bawendi, M. G. Synthesis and characterization of nearly monodisperse CdE (E \= sulfur, selenium, tellurium) semiconductor nanocrystallites. J. Am. Chem. Soc. 115, 8706–8715 (1993).

Article
ADS
CAS
Google Scholar
26. Yin, Y. \& Alivisatos, A. P. Colloidal nanocrystal synthesis and the organic–inorganic interface. Nature 437, 664–670 (2005).

Article
ADS
CAS
PubMed
Google Scholar
27. Dean, J. A. Lange’s Handbook of Chemistry 15th edn (McGraw-Hill, 1999).
28. Zhang, H. et al. Stable colloids in molten inorganic salts. Nature 542, 328–331 (2017).

Article
ADS
CAS
PubMed
Google Scholar
29. Zhou, Z. et al. Colloidal chemistry in molten inorganic salts: direct synthesis of III–V quantum dots via dehalosilylation of (Me3Si)3Pn (Pn \= P, As) with group III halides. J. Am. Chem. Soc. 147, 9198–9209 (2025).

Article
ADS
CAS
PubMed
Google Scholar
30. Ondry, J. C. et al. Reductive pathways in molten inorganic salts enable colloidal synthesis of III-V semiconductor nanocrystals. Science 386, 401–407 (2024).

Article
ADS
CAS
PubMed
Google Scholar
31. Portehault, D. et al. A general solution route toward metal boride nanocrystals. Angew. Chem. Int. Ed. 50, 3262–3265 (2011).

Article
CAS
Google Scholar
32. Liu, X., Fechler, N. \& Antonietti, M. Salt melt synthesis of ceramics, semiconductors and carbon nanostructures. Chem. Soc. Rev. 42, 8237–8265 (2013).

Article
CAS
PubMed
Google Scholar
33. Guan, H. et al. General molten-salt route to three-dimensional porous transition metal nitrides as sensitive and stable Raman substrates. Nat. Commun. 12, 1376 (2021).

Article
ADS
CAS
PubMed
PubMed Central
Google Scholar
34. Cho, W., Zhou, Z., Lin, R., Ondry, J. C. \& Talapin, D. V. Synthesis of colloidal GaN and AlN nanocrystals in biphasic molten salt/organic solvent mixtures under high-pressure ammonia. ACS Nano 17, 1315–1326 (2023).

Article
CAS
Google Scholar
35. Cassidy, J. et al. Ammoniate intermediates enable tunable biphasic molten salt/organic synthesis of colloidal GaN nanocrystals. Chem. Mater. 38, 4017–4028 (2026).

Article
CAS
Google Scholar
36. Parvizian, M. et al. Molten salt-assisted synthesis of titanium nitride. Small Methods 8, 2400228 (2024).

Article
CAS
PubMed
PubMed Central
Google Scholar
37. Jacobs, K., Zaziski, D., Scher, E. C., Herhold, A. B. \& Paul Alivisatos, A. Activation volumes for solid-solid transformations in nanocrystals. Science 293, 1803–1806 (2001).

Article
ADS
CAS
PubMed
Google Scholar
38. Hendricks, M. P., Campos, M. P., Cleveland, G. T., Plante, I.J.-L. \& Owen, J. S. A tunable library of substituted thiourea precursors to metal sulfide nanocrystals. Science 348, 1226–1230 (2015).

Article
ADS
CAS
PubMed
Google Scholar
39. Allulli, S. Solubilities of ammonia in alkali nitrate and perchlorate melts. J. Phys. Chem. 73, 1084–1087 (1969).

Article
ADS
CAS
Google Scholar
40. Jolly, W. A. Heats, free energies, and entropies in liquid ammonia. Chem. Rev. 50, 351–361 (1952).

Article
CAS
Google Scholar
41. Takekawa, N. et al. GaN growth via tri-halide vapor phase epitaxy using solid source of GaCl3: investigation of the growth dependence on NH3 and additional Cl2. Jpn. J. Appl. Phys. 58, SC1022 (2019).

Article
CAS
Google Scholar
42. Nakamura, S., Mukai, T., Senoh, M. \& Iwasa, N. Thermal annealing effects on p-type Mg-doped GaN films. Jpn. J. Appl. Phys. 31, L139 (1992).

Article
ADS
CAS
Google Scholar
43. Jain, S. C., Willander, M., Narayan, J. \& Van Overstraeten, R. III–nitrides: growth, characterization, and properties. J. Appl. Phys. 87, 965–1006 (2000).

Article
ADS
CAS
Google Scholar
44. Yu, K. M. et al. Effects of native defects on properties of low temperature grown, non- stoichiometric gallium nitride. J. Phys. D Appl. Phys. 48, 385101 (2015).

Article
ADS
Google Scholar
45. Hubáček, T., Hospodková, A., Oswald, J., Kuldova, K. \& Pangrác, J. Improvement of luminescence properties of GaN buffer layer for fast nitride scintillator structures. J. Cryst. Growth 464, 221–225 (2017).

Article
ADS
Google Scholar
46. Guler, U., Shalaev, V. M. \& Boltasseva, A. Nanoparticle plasmonics: going practical with transition metal nitrides. Mater. Today 18, 227–237 (2015).

Article
CAS
Google Scholar
47. Tsai, M.-F. et al. Au nanorod design as light-absorber in the first and second biological near-infrared windows for in vivo photothermal therapy. ACS Nano 7, 5330–5342 (2013).

Article
CAS
PubMed
Google Scholar
48. van Hove, R. P., Sierevelt, I. N., van Royen, B. J. \& Nolte, P. A. Titanium-nitride coating of orthopaedic implants: a review of the literature. BioMed Res. Int. 2015, 485975 (2015).

PubMed
PubMed Central
Google Scholar
49. Yan, R. et al. GaN/NbN epitaxial semiconductor/superconductor heterostructures. Nature 555, 183–189 (2018).

Article
ADS
CAS
PubMed
Google Scholar
50. Zolotavin, P. \& Guyot-Sionnest, P. Meissner effect in colloidal Pb nanoparticles. ACS Nano 4, 5599–5608 (2010).

Article
CAS
PubMed
Google Scholar
51. Kresse, G. \& Furthmüller, J. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set. Phys. Rev. B 54, 11169–11186 (1996).

Article
ADS
CAS
Google Scholar
52. Perdew, J. P., Burke, K. \& Ernzerhof, M. Generalized gradient approximation made simple. Phys. Rev. Lett. 77, 3865–3868 (1996).

Article
ADS
CAS
PubMed
Google Scholar
53. Kresse, G. \& Joubert, D. From ultrasoft pseudopotentials to the projector augmented-wave method. Phys. Rev. B 59, 1758–1775 (1999).

Article
ADS
CAS
Google Scholar
54. Grimme, S., Antony, J., Ehrlich, S. \& Krieg, H. A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu. J. Chem. Phys. 132, 154104 (2010).

Article
ADS
PubMed
Google Scholar
55. Nosé, S. A unified formulation of the constant temperature molecular dynamics methods. J. Chem. Phys. 81, 511–519 (1984).

Article
ADS
Google Scholar
56. Khudorozhkova, A. O., Isakov, A. V., Kataev, A. A., Red’kin, A. A. \& Zaikov, Y. P. Density of KF–KCl–KI melts. Russ. Metall. 2020, 918–924 (2020).

Article
ADS
Google Scholar
57. Khokhar, V. \& Jiang, D.-e. Ammonia pressure controls colloidal metal nitride synthesis in molten salts - DFT structures and AIMD simulation trajectories. Zenodo https://doi.org/10.5281/zenodo.20383972 (2026).