posted on 2022-12-19, 15:41authored byVíctor Rubio-Giménez, Giel Arnauts, Mingchao Wang, Eduardo Sergio Oliveros Mata, Xing Huang, Tianshu Lan, Max L. Tietze, Dmitry E. Kravchenko, Jorid Smets, Nathalie Wauteraerts, Azat Khadiev, Dmitri V. Novikov, Denys Makarov, Renhao Dong, Rob Ameloot
Crystalline
coordination polymers with high electrical conductivities
and charge carrier mobilities might open new opportunities for electronic
devices. However, current solvent-based synthesis methods hinder compatibility
with microfabrication standards. Here, we describe a solvent-free
chemical vapor deposition method to prepare high-quality films of
the two-dimensional conjugated coordination polymer Cu-BHT (BHT =
benzenehexanothiolate). This approach involves the conversion of a
metal oxide precursor into Cu-BHT nanofilms with a controllable thickness
(20–85 nm) and low roughness (<10 nm) through exposure to
the vaporized organic linker. Moreover, the restricted metal ion mobility
during the vapor–solid reaction enables high-resolution patterning
via both bottom-up lithography, including the fabrication of micron-sized
Hall bar and electrode patterns to accurately evaluate the conductivity
and mobility values of the Cu-BHT films.