![]() ![]() Government guidelines, round-trip economy class air travel, applicable allowances and modest affiliation fees, if any. The fellowships provide J-1 visa support, a monthly stipend, Accident and Sickness Program for Exchanges per U.S. These fellowships are for six to nine months.Īpplications are invited in the following fields only: Agricultural Sciences Anthropology Bioengineering Chemistry Computer Science (including, but not limited to, cyber security, digital economy, quantum computing, artificial intelligence, machine learning and big data analytics) Earth Sciences Economics Education Policy and Planning Energy Studies History Language/Literature/Linguistics Materials Science (with emphasis on environmental applications) Mathematical Sciences Neurosciences Performing Arts Physics Political Science (including, but not limited to, International Security and Strategic Studies) Psychology Public Health (including, but not limited to, pandemic preparedness and comprehensive surveillance (genomic surveillance, sewage surveillance, sero-surveillance)) Public Policy Sociology Urban and Regional Planning (with emphasis on smart cities and waste management) Visual Arts and Women’s and Gender Studies. The Fulbright-Nehru Doctoral Research Fellowships are designed for Indian scholars who are registered for a Ph.D. Our studies on the detailed crystal structure and optical properties of LiDy(WO4)2 polymorphs provide a fundamental understanding of symmetry-dependent properties, which can be further explored to get desirable optical properties for more technological applications in the near future.Ģ024-2025 Fulbright-Nehru Doctoral Research Fellowships The non-interference of down-conversion and up-conversion emission in β-LiDy0.7Yb0.2Er0.1(WO4)2 shows dual-mode properties, which find potential use in solid-state display applications. Interestingly, the material preserves D圓+ transitions yielding bright yellow emission under UV excitation, specifying the critical role of excitation role on emission color. The β-LiDy0.7Yb0.2Er0.1(WO4)2 shows an intense red emission roughly around 656 nm due to the inherent lower crystal symmetry and the cooperative effect of Yb3+ and Er3+ transitions under NIR irradiation. The optimized co-substitution of the Yb3+−Er3+ couple in LiDy(WO4)2 lattice exhibited up-conversion red emission up on 980 nm laser excitation. ![]() The density functional theory calculations show that the β-LiDyW is energetically more favorable than α-LiDyW by 337.3 meV per formula unit at 0 K. The Wolframite to Scheelite (β→α) transformation is observed as a function of warming, where WO6 transformed to free WO4 going from β→α. In contrast, they share a distinct crystallographic site in the β-LiDyW. Crystal structure analysis using neutron diffraction data shows the statistical distribution of Li+ and D圓+ on a dodecahedral S4 site, sharing a similar crystallographic site in the α-LiDyW lattice. LiDy(WO4)2 crystallizes in a monoclinic wolframite-type structure (P21/n) at ambient temperature and a Scheelite-like tetragonal structure (I41/a) upon heating at high temperature. We demonstrated the temperature-driven irreversible structural phase transition in LiDy(WO4)2 using a solution-based simple sol-gel method at relatively lower temperatures and time. Please find the link for the full pdf (accessible up to May 27th).
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