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Multi-metal coordination polymers grown through hybrid molecular layer deposition
Nathaniel E Richey1, Shirin Borhan, Stacey F Bent
1Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA. sbent@stanford.edu.
Dalton Transactions (Cambridge, England : 2003)
|March 10, 2021
Summary
Hybrid molecular layer deposition (MLD) creates functional coordination polymers. Zn-Hf films show improved stability and no transmetalation, unlike Zn-Al films, offering enhanced material properties.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Coordination polymers are functional materials with conformal thin film properties.
- Hybrid molecular layer deposition (MLD) enables the creation of these advanced materials.
- Incorporating multiple metals offers tunable properties and enhanced functionality.
Purpose of the Study:
- To investigate the deposition of multi-metal coordination polymers using hybrid MLD.
- To compare the properties of Zn-Al and Zn-Hf coordination polymers.
- To assess the impact of transmetalation and ambient stability on these materials.
Main Methods:
- Hybrid molecular layer deposition (MLD) using Zn-Al and Zn-Hf precursors.
- Ethylene glycol as the organic linker for film growth.
- Analysis of film composition and stability under ambient conditions.
Main Results:
- Facile transmetalation observed in Zn-Al films, leading to Al-rich compositions.
- No significant transmetalation occurred in Zn-Hf films.
- Zn-Hf coordination polymers exhibited greater resilience to ambient conditions compared to pure Zn films.
Conclusions:
- Hybrid MLD allows for the controlled deposition of multi-metal coordination polymers.
- Transmetalation behavior differs significantly between Zn-Al and Zn-Hf systems.
- Zn-Hf coordination polymers present a promising pathway for robust, functional thin films.
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