Effects of surface ligands on the formation of spherical hollow nickel phosphide nanoparticles and their self-assemblies


  • Minh Hoang Tran Faculty of Materials Technology, Ho Chi Minh City University of Technology, VietNam National University, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam
  • Miao Shi Department of Chemical Engineering, University of Rochester, Rochester, New York 14627 USA
  • Qing Du Department of Chemical Engineering, University of Rochester, Rochester, New York 14627 USA
  • Hong Yang Department of Chemical Engineering, University of Rochester, Rochester, New York 14627 USA




Spherical hollow nanoparticles, self-assemblies, nickel phosphide, surface ligands, Kirkendal effect


Nickel phosphide nanoparticles have beenwellknown for their electrical, catalytic, and corrosion-resistant properties. In the synthesis of hollow nickel phosphide nanoparticles, the role of surface ligands was very important in forming hollow structures. Thus, in this article, wesystematicallyinvestigated the effects of different ligands on the formation of spherical hollow nickel phosphide nanoparticles. Specifically, our results showed that when primary amines with long alkyl chains were used, spherical hollow nickel phosphide nanoparticles wereobtained. On the other hand, when amines with bulky head groups, bulky alkyl chains, or ligands with different head groups were used, spherical hollow nickel phosphide nanoparticles did not form.Furthermore, moderate useof tri-n-octylphosphine (TOP), another surface ligand and P precursor, wasalsoa contributing factor to the hollow nickel phosphide formation. Interestingly, we discovered that limited use of TOPinducedself-assembling of spherical hollow nickel phosphide nanoparticles into micro-sized assemblies. The assemblies were spherical, compact and uniform,whichfurther showing the use of surface ligands as a tool to engineer novel material structures from the nano-/micro-scales.We are currently directing our efforts toward more understanding of the self-assembling mechanism at the sub-nano scale as well as proposing possible application for our nanoparticles and their assemblies.


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How to Cite

M. H. Tran, M. Shi, Q. Du, and H. Yang, “Effects of surface ligands on the formation of spherical hollow nickel phosphide nanoparticles and their self-assemblies”, Vietnam J. Sci. Technol., vol. 59, no. 6A, pp. 92–104, Mar. 2022.



International Symposium on Materials Science and Engineering - ISMSE