THE KAUST Repository is an initiative of the University Library to expand the impact of conference papers, technical reports, peer-reviewed articles, preprints, theses, images, data sets, and other research-related works of King Abdullah University of Science and Technology (KAUST).
Files in the repository are accessible through popular web search engines and are given persistent web addresses so links will not become broken over time.
KAUST researchers: To add your research to the repository, click on Deposit your Research, log in with your KAUST user name and password, and deposit the item in the appropriate collection.
If you have any questions, please contact email@example.com.
KAUST Library Transformative Agreements 2019 2021(2021-09-28) [Poster]The Kaust University Library signed a number of transformative agreements with STEM publishers from 2019 to 2021. This poster presents our initial strategy, results, challenges, and plans in the open access publishing area. In 2019 KAUST Library signed 3 transformative agreements with STEM publishers. In 2020 the number of deals increased to 7, and in 2021 to 11. The number of OA articles published under these agreements has been growing steadily - 31 articles published under the terms of transformative agrements in 2019, 111 articles in 2020. The expectations of KAUST authors to have more options to publish open access free of charge are growing, too. Our initial strategy proved to be very successful with smaller and mid-sized publishers, but we reached the point where we should create an evidence-based approach and revise our strategy to deal with big publishers. Higher instances and alignment with the University-wide strategic plan (with clear goals in open research and open access area) are needed to take our open access publishing to the next level.
Capturing 3D atomic defects and phonon localization at the 2D heterostructure interface(Science Advances, American Association for the Advancement of Science (AAAS), 2021-09-15) [Article]The three-dimensional (3D) local atomic structures and crystal defects at the interfaces of heterostructures control their electronic, magnetic, optical, catalytic, and topological quantum properties but have thus far eluded any direct experimental determination. Here, we use atomic electron tomography to determine the 3D local atomic positions at the interface of a MoS2-WSe2 heterojunction with picometer precision and correlate 3D atomic defects with localized vibrational properties at the epitaxial interface. We observe point defects, bond distortion, and atomic-scale ripples and measure the full 3D strain tensor at the heterointerface. By using the experimental 3D atomic coordinates as direct input to first-principles calculations, we reveal new phonon modes localized at the interface, which are corroborated by spatially resolved electron energy-loss spectroscopy. We expect that this work will pave the way for correlating structure-property relationships of a wide range of heterostructure interfaces at the single-atom level.
Janus monolayers of magnetic transition metal dichalcogenides as an all-in-one platform for spin-orbit torque(Physical Review B, American Physical Society (APS), 2021-09-15) [Article]We theoretically predict that vanadium-based Janus dichalcogenide monolayers constitute an ideal platform for spin-orbit torque memories. Using first-principles calculations, we demonstrate that magnetic exchange and magnetic anisotropy energies are higher for heavier chalcogen atoms, while the broken inversion symmetry in the Janus form leads to the emergence of Rashba-like spin-orbit coupling. The spin-orbit torque efficiency is evaluated using optimized quantum transport methodology and found to be comparable to heavy nonmagnetic metals. The coexistence of magnetism and spin-orbit coupling in such materials with tunable Fermi-level opens new possibilities for monitoring magnetization dynamics in the perspective of nonvolatile magnetic random access memories.
High Throughput Printing of Two-Dimensional Materials into Wafer-scale Three-dimensional Architectures(Research Square Platform LLC, 2021-09-15) [Preprint]Architected materials that actively respond to external stimuli hold tantalizing prospects for applications in energy storage, harvesting, wearable electronics and bioengineering. Transition metal dichalcogenides (TMDs) which represent the three-atom-thick, two-dimensional (2D) building blocks, are excellent candidates but have found limited success compared to metallic, inorganic, and organic counterparts due to the lack of up-scalable manufacturing. Here we report the high-throughput printing of 2D TMDs into wafer-scale 3D architectures with structural hierarchy across seven orders of magnitude between critical feature sizes. Anode made of 3D MoS2 architectures comprises the concentric vortex-like intricacy that unites technological merits from architecture, mechanical engineering, and electrochemistry not found in its bulk or exfoliated/epitaxy counterparts. The result is, contrary to expectation, the high-rate, high-capacity, and high-loading lithium (Li)-storage, surpassing those state-of-the-art anode designs while the technique offers an evaporation-like simplicity for industrial scalability.
Two-Dimensional TiO2/TiS2 Hybrid Nanosheet Anodes for High-Rate Sodium-Ion Batteries(ACS Applied Energy Materials, American Chemical Society (ACS), 2021-09-15) [Article]The sodium-ion battery (NIB) is promising for next-generation energy storage systems. One promising anode material is titanium dioxide (TiO2). However, the sluggish sodiation/desodiation kinetics of TiO2 hinders its application in NIBs. Herein, we converted TiO2 into a two-dimensional (2D) TiO2/TiS2 hybrid to improve its sodium storage capability. The 2D TiO2/TiS2 hybrid nanosheet electrode provides high kinetics and excellent cycling performance for sodium-ion storage. This work provides a promising strategy to develop 2D hybrid nanomaterials for high-performance sodium storage devices.