Nanoimprint Lithography-Directed Self-Assembly of Bimetallic Iron–M (M=Palladium, Platinum) Complexes for Magnetic Patterning

Zhengong Meng, Guijun Li, Sze Chun Yiu, Nianyong ZHU, Zhen Qiang Yu, Chi Wah Leung, Ian Manners, Wai Yeung WONG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Self-assembly of d8 metal polypyridine systems is a well-established approach for the creation of 1D organometallic assemblies but there are still challenges for the large-scale construction of nanostructured patterns from these building blocks. We describe herein the use of high-throughput nanoimprint lithography (NIL) to direct the self-assembly of the bimetallic complexes [4′-ferrocenyl-(2,2′:6′,2′′-terpyridine)M(OAc)]+(OAc) (M=Pd or Pt; OAc=acetate). Uniform nanorods are fabricated from the molecular self-organization and evidenced by morphological characterization. More importantly, when top-down NIL is coupled with the bottom-up self-assembly of the organometallic building blocks, regular arrays of nanorods can be accessed and the patterns can be controlled by changing the lithographic stamp, where the mold imposes a confinement effect on the nanorod growth. In addition, patterns consisting of the products formed after pyrolysis are studied. The resulting arrays of ferromagnetic FeM alloy nanorods suggest promising potential for the scalable production of ordered magnetic arrays and fabrication of magnetic bit-patterned media.

Original languageEnglish
Pages (from-to)11521-11526
Number of pages6
JournalAngewandte Chemie. International Edition
Volume59
Issue number28
DOIs
Publication statusPublished - 6 Jul 2020

Scopus Subject Areas

  • Catalysis
  • Chemistry(all)

User-Defined Keywords

  • bimetallic complexes
  • magnetic nanoparticles
  • nanoimprint lithography
  • nanorods
  • self-assembly

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