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1. Metal-metal contact resistance measurements

   Shen, Poyen; Gall, Daniel (June 2024, IEEE)

   The contact resistance at metal-metal (W, Mo, Ru, Co, TiN) interfaces is determined using a new method based on blanket superlattice thin films where the resistivity ρ parallel to the interfaces is measured as a function of superlattice period Λ to quantify the electron interface scattering. Epitaxial W(001)/Mo(001) superlattices show a continuous resistivity increase from 7.10 to 8.62 µΩ-cm with decreasing Λ = 50-1.7 nm, indicating a contact resistance of 2.6×10-16 Ω-m2. Ru/Co multilayers show a much more pronounced increase from 15.0 to 47.5 µΩ-cm with Λ = 60-2 nm which is attributed to atomic intermixing leading to an interfacial Ru-Co alloy with a high measured ρ = 61 µΩ-cm and a Ru-Co contact resistance for interfaces deposited at 400 °C of 9.1 ×10-15 Ω-m2. Ru/TiN and Co/TiN interface resistances are dominated by the high ρ for TiN, and are therefore proportional to the TiN thickness. 

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2. A Metal-on-Metal Growth Approach to Metal–Metal Oxide Core–Shell Nanostructures with Plasmonic Properties

   https://doi.org/10.1021/acs.jpcc.0c03226  

   Crane, Cameron C.; Manso, Ryan H.; Li, Jun; Benamara, Mourad; Tao, Jing; Zhu, Yimei; Wang, Feng; Chen, Jingyi (July 2020, The Journal of Physical Chemistry C)
3. Paramagnetic Metal–Metal Bonded Heterometallic Complexes

   https://doi.org/10.1021/acs.chemrev.9b00540  

   Chipman, Jill A.; Berry, John F. (March 2020, Chemical Reviews)

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4. Metal–Metal Bond Umpolung in Heterometallic Extended Metal Atom Chains

   https://doi.org/10.1021/acs.inorgchem.2c02118  

   Wheaton, Amelia M.; Chipman, Jill A.; Roy, Michael D.; Berry, John. F. (September 2022, Inorganic Chemistry)
5. Metal–Organic Frameworks with Low‐Valent Metal Nodes

   https://doi.org/10.1002/anie.202206353  

   Sikma, R. Eric; Balto, Krista P.; Figueroa, Joshua S.; Cohen, Seth M. (July 2022, Angewandte Chemie International Edition)

   Abstract Metal–organic frameworks (MOFs) are crystalline, 2‐ and 3‐dimensional coordination polymers formed by bonding interactions between metals and multitopic organic ligands. These are typically formed using hard Lewis basic organic ligands with high oxidation state metal ions. The use of low‐valent metals as structural elements in MOFs is far less common, despite the widespread use of such metals for catalysis, luminescence, and other applications. This Minireview focuses on recent advances in the field of low‐valent MOFs and offers a perspective on the future development of these materials. 

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