Regioselective Deposition of Metals on Seeds within a Polymer Matrix

Liliang Huang, Bo Shen, Haixin Lin, Jiahong Shen, Liban Jibril, Cindy Y. Zheng, Chris Wolverton, Chad A. Mirkin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We use scanning probe block copolymer lithography in a two-step sequential manner to explore the deposition of secondary metals on nanoparticle seeds. When single element nanoparticles (Au, Ag, Cu, Co, or Ni) were used as seeds, both heterogeneous and homogeneous growth occurred, as rationalized using the thermodynamic concepts of bond strength and lattice mismatch. Specifically, heterogeneous growth occurs when the heterobond strength between the seed and growth atoms is stronger than the homobond strength between the growth atoms. Moreover, the resulting nanoparticle structure depends on the degree of lattice mismatch between the seed and growth metals. Specifically, a large lattice mismatch (e.g., 13.82% for Au and Ni) typically resulted in heterodimers, whereas a small lattice mismatch (e.g., 0.19% for Au and Ag) resulted in core-shell structures. Interestingly, when heterodimer nanoparticles were used as seeds, the secondary metals deposited asymmetrically on one side of the seed. By programming the deposition conditions of Ag and Cu on AuNi heterodimer seeds, two distinct nanostructures were synthesized with (1) Ag and Cu on the Au domain and (2) Ag on the Au domain and Cu on the Ni domain, illustrating how this technique can be used to predictively synthesize structurally complex, multimetallic nanostructures.

Original languageEnglish (US)
Pages (from-to)4792-4798
Number of pages7
JournalJournal of the American Chemical Society
Volume144
Issue number11
DOIs
StatePublished - Mar 23 2022

Funding

The project described was supported by the Sherman Fairchild Foundation, Inc. (particle synthesis), the Toyota Research Institute, Inc. (STEM characterization), the Air Force Office of Scientific Research award FA9550-17-1-0348 (polymer preparation), and the Center for Bio-Inspired Energy Science, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences award DE-SC0000989 (HRTEM characterization). L.J. was supported by the National Science Foundation (NSF) through the National Science Foundation Graduate Research Fellowship Program under grant no. DGE-1842165. Any opinions, findings, and conclusions or recommendations expressed in this work are those of the authors and do not necessarily reflect the views of the National Science Foundation. J.S. and C.W. were supported by the Materials Research Science and Engineering Centers (MRSEC) program (NSF grant DMR-1720139) at the Materials Research Center of Northwestern University. The computational resources are supported by the National Energy Research Scientific Computing Center, a US Department of Energy Office of Science User Facility operated under contract DE-AC02-05CH11231 and the Quest high-performance computing facility at the Northwestern University. This work made use of the Electron Probe Instrumentation Center facility of the Northwestern University Atomic and Nanoscale Characterization Experimental Center, which has received support from the Soft and Hybrid Nanotechnology Experimental Resource (NSF grant ECCS1542205); the MRSEC program (NSF grant DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. B.S. gratefully acknowledges support from the IIN Postdoctoral Fellowship and the Northwestern University IIN. We thank Dr. S. H. Petrosko (Northwestern University) for providing editorial input.

ASJC Scopus subject areas

  • General Chemistry
  • Biochemistry
  • Catalysis
  • Colloid and Surface Chemistry

Fingerprint

Dive into the research topics of 'Regioselective Deposition of Metals on Seeds within a Polymer Matrix'. Together they form a unique fingerprint.

Cite this