Results 1 to 10 of about 5,797,722 (259)

Pressure stabilizes ferrous iron in bridgmanite under hydrous deep lower mantle conditions

Nature Communications
Earth’s lower mantle is a potential water reservoir. The physical and chemical properties of the region are in part controlled by the Fe3+/ΣFe ratio and total iron content in bridgmanite.
Li Zhang, Yongjin Chen, Ziqiang Yang, Lu Liu, Yanping Yang, Philip Dalladay-Simpson, Junyue Wang, Ho-kwang Mao   +7 more
doaj   +1 more source

High-Pressure Preparation of High-Strength Wood Materials

Gaoya wuli xuebao
Mineral resources on Earth are finite, but wood is renewable. Therefore, replacing limited industrial materials with modified wood remains a long-term pursuit. This study processed samples of three wood types, including balsa (Ochroma lagopus), basswood (
Zi YE, Xuefeng ZHOU, Jianing XU, Chenglin ZHOU, Yi YANG, Linpeng ZHENG, Bin CHEN   +6 more
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From Molecules to Carbon Materials—High Pressure Induced Polymerization and Bonding Mechanisms of Unsaturated Compounds

Crystals, 2019
With the development of high-pressure apparatus, in situ characterization methods and theoretical calculations, high-pressure technology becomes a more and more important method to synthesize new compounds with unusual structures and properties.
Xin Yang, Xuan Wang, Yida Wang, Kuo Li, Haiyan Zheng   +4 more
doaj   +1 more source

Hydrogen site-dependent physical properties of hydrous magnesium silicates in the mantle transition zone

Nature Communications
The Earth’s mantle transition zone (MTZ) is widely recognized as a major water reservoir, exerting significant influence on the planet’s water budget and deep cycling processes.
Zifan Wang, Yu He, Ho-kwang Mao, Duck Young Kim   +3 more
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In situ high-pressure spectroscopic studies using moissanite (4H-SiC) anvils

AIP Advances, 2018
We examined the Raman scattering and IR absorption spectroscopy of 4H-SiC and its performance as an anvil material for high-pressure UV-visible absorption spectroscopic measurements.
Jinbo Zhang, Xinli Zhao, Zhipeng Yan, Ye Yuan, Xin Li, Cuiying Pei, Haiyan Zheng, Lin Wang   +7 more
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Redox reactions in subducted CaCO3–Fe–SiO2 as a potential source of superdeep diamond inclusions

Scientific Reports
CaCO3 is one of the most abundant carbonates at the Earth’s surface. It is transported into the mantle in substantial quantities via subducted slabs and participates in the deep mantle carbon cycle along with other mantle materials.
Mengqi Guo, Xinyang Li, Zhu Mao, Fangfei Li, Liang Li, Qiang Zhou   +5 more
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Pressure-driven crystal symmetry and carrier concentration optimization for superior thermoelectric transport properties in layered AgCrSe2 [PDF]

Matter and Radiation at Extremes
Phase engineering has proven to be an effective strategy for achieving superior thermoelectric performance, while pressure is an excellent means of expanding the phase space of a material. In this paper, the effect of pressure-induced phase transition on
Zheng Bi, Dianzhen Wang, Yiyang Zhou, Yang Gao, Jing Zou, Fuyang Liu, Qiang Tao, Bin Yang, Huijuan Yue, Luhong Wang, Haozhe Liu, Yan Li, Pinwen Zhu   +12 more
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Application of machine learning for nanodiamonds shape and surface classification based on X-ray pattern analysis

Scientific Reports
Three Machine Learning algorithms, namely Random Forest, Neural Networks and Extreme Gradient Boosting, were applied to recognize the shape and surface structure of diamond nanoparticles from powder diffraction data.
Kazimierz Skrobas, Kamila Stefańska-Skrobas, Svitlana Stelmakh, Stanisław Gierlotka, Bogdan Palosz   +4 more
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The optimal substrate choice for effective biosensors based on THz metasurfaces

Scientific Reports
This article explores the impact of substrate choice on the sensitivity of sensors that utilize metallic terahertz metasurfaces as the actuating element.
Pradeep Tiwari, Deepak Kala, Maciej Sakowicz   +2 more
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Band gap closure, incommensurability and molecular dissociation of dense chlorine

Nature Communications, 2019
Molecular systems are predicted to transform into atomic solids and be metallic at high pressure; this was observed for the diatomic elements iodine and bromine. Here the authors access the higher pressures needed to observe the dissociation in chlorine,
Philip Dalladay-Simpson, Jack Binns, Miriam Peña-Alvarez, Mary-Ellen Donnelly, Eran Greenberg, Vitali Prakapenka, Xiao-Jia Chen, Eugene Gregoryanz, Ross T. Howie   +8 more
doaj   +1 more source