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Nanoimprint Lithography‐Directed Self‐Assembly of Bimetallic Iron–M (M=Palladium, Platinum) Complexes for Magnetic Patterning
Author(s) -
Meng Zhengong,
Li Guijun,
Yiu SzeChun,
Zhu Nianyong,
Yu ZhenQiang,
Leung ChiWah,
Manners Ian,
Wong WaiYeung
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202002685
Subject(s) - nanorod , materials science , bimetallic strip , nanoimprint lithography , palladium , nanotechnology , self assembly , nanolithography , platinum , lithography , fabrication , optoelectronics , metal , catalysis , chemistry , metallurgy , medicine , alternative medicine , pathology , biochemistry
Self‐assembly of d 8 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.