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1. Noncentrosymmetric γ - Cs ₂ I ₄ O ₁₁ Obtained from IO ₄ Polyhedral Rearrangements in the Centrosymmetric β - Phase

   https://doi.org/10.1021/acs.inorgchem.2c04450  

   Liang, Ming-Li; Lacroix, Matthew; Tao, Ce; Waters, Michael J.; Rondinelli, James M.; Halasyamani, P. Shiv (February 2023, Inorganic Chemistry)
2. Copper’s Role in the Photoluminescence of Ag _1–x Cu _x InS ₂ Nanocrystals, from Copper-Doped AgInS ₂ ( x ∼ 0) to CuInS ₂ ( x = 1)

   https://doi.org/10.1021/acs.nanolett.8b04905  

   Hughes, Kira E.; Ostheller, Sarah R.; Nelson, Heidi D.; Gamelin, Daniel R. (January 2019, Nano Letters)
3. Determination of F_v / F_m from Chlorophyll a Fluorescence without Dark Adaptation by an LSSVM Model

   https://doi.org/10.34133/plantphenomics.0034  

   Xia, Qian; Tang, Hao; Fu, Lijiang; Tan, Jinglu; Govindjee, Govindjee; Guo, Ya (January 2023, Plant Phenomics)

   Evaluation of photosynthetic quantum yield is important for analyzing the phenotype of plants. Chlorophyll a fluorescence (ChlF) has been widely used to estimate plant photosynthesis and its regulatory mechanisms. The ratio of variable to maximum fluorescence, F v / F m , obtained from a ChlF induction curve, is commonly used to reflect the maximum photochemical quantum yield of photosystem II (PSII), but it is measured after a sample is dark-adapted for a long time, which limits its practical use. In this research, a least-squares support vector machine (LSSVM) model was developed to explore whether F v / F m can be determined from ChlF induction curves measured without dark adaptation. A total of 7,231 samples of 8 different experiments, under diverse conditions, were used to train the LSSVM model. Model evaluation with different samples showed excellent performance in determining F v / F m from ChlF signals without dark adaptation. Computation time for each test sample was less than 4 ms. Further, the prediction performance of test dataset was found to be very desirable: a high correlation coefficient (0.762 to 0.974); a low root mean squared error (0.005 to 0.021); and a residual prediction deviation of 1.254 to 4.933. These results clearly demonstrate that F v / F m , the widely used ChlF induction feature, can be determined from measurements without dark adaptation of samples. This will not only save experiment time but also make F v / F m useful in real-time and field applications. This work provides a high-throughput method to determine the important photosynthetic feature through ChlF for phenotyping plants. 

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4. Emerging Weyl Semimetal States in Ternary TaP _x As _{1− x} Alloys: Insights from Electronic and Topological Analysis

   https://doi.org/10.1002/qute.202300072  

   Nourizadeh, Samira Sadat; Vaez, Aminollah; Vashaee, Daryoosh (May 2023, Advanced Quantum Technologies)

   Abstract This study presents a thorough analysis of the electronic structures of the TaP_xAs_1−xseries of compounds, which are of significant interest due to their potential as topological materials. Using a combination of first principles and Wannier‐based tight‐binding methods, this study investigates both the bulk and surface electronic structures of the compounds for varying compositions (x = 0, 0.25, 0.50, 0.75, 1), with a focus on their topological properties. By using chirality analysis, (111) surface electronic structure analysis, and surface Fermi arcs analysis, it is established that the TaP_xAs_1−xcompounds exhibit topologically nontrivial behavior, characterized as Weyl semimetals (WSMs). The effect of spin–orbit coupling (SOC) on the topological properties of the compounds is further studied. In the absence of SOC, the compounds exhibit linearly dispersive fourfold degenerate points in the first Brillouin zone (FBZ) resembling Dirac semimetals. However, the introduction of SOC induces a phase transition to WSM states, with the number and position of Weyl points (WPs) varying depending on the composition of the alloy. For example, TaP has 12 WPs in the FBZ. The findings provide novel insights into the electronic properties of TaP_xAs_1−xcompounds and their potential implications for the development of topological materials for various technological applications. 

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5. Efficient HO _x Radical Production from Isoprene Nighttime Chemistry

   https://doi.org/10.1021/acsearthspacechem.3c00323  

   Moo, Zeyi; Hao, Peizhi; DeMarsh, Kate E; Zhang, Xuan (February 2024, ACS Earth and Space Chemistry)