Results 51 to 60 of about 3,664 (281)

Elasticity of serpentines and extensive serpentinization in subduction zones [PDF]

Geophysical Research Letters, 2007
Elastic constants of lizardite [Mg3Si2O5(OH)4] were computed using first‐principles quantum mechanical calculations within the density functional theory. The predicted c‐axis compressibility is much larger than measured. Modeling of the weak O‐H⋯O interactions between layers must be improved in order to better predict layered hydrated mineral elastic ...
Reynard, Bruno, Hilairet, Nadège, Balan, Etienne, Lazzeri, Michele   +3 more
openaire   +3 more sources

Contrasted Effect of Spinel and Pyroxene on Molecular Hydrogen (H2) Production during Serpentinization of Olivine

, 2021
Serpentinization produces molecular hydrogen (H2) and hydrocarbons that can feed the colonies of microbes in hydrothermal vent fields, and therefore serpentinization may be important for the origins of life. However, the mechanisms that control molecular
Huang, Ruifang, Xing Ding, Ding, Xing, Ruifang Huang, Xiuqi Shang, Weidong Sun, Sun, Weidong, Shang, Xiuqi   +7 more
core   +1 more source

Understanding Operando Water Management in Hydroxide‐Exchange‐Membrane Fuel Cells

Advanced Materials Interfaces, EarlyView.
Effective water management is vital for high‐performance hydroxide‐exchange‐membrane fuel cells. Using a custom water‐flux station, this study quantifies how membrane thickness, microporous layers, and operating conditions dictate internal water transport.
Catherine M. Weiss, Shiyi Wang, Brian P. Setzler, Yushan Yan, Adam Z. Weber   +4 more
wiley   +1 more source

Origin and evolution of serpentinized peridotite from the Ciletuh Mélange in Sunda Arc, Indonesia: Evidence from petrography, mineralogy, and geochemistry

Journal of Asian Earth Sciences: X
The Ciletuh Mélange in southern Sundaland (West Java, Indonesia) is a key location for ophiolitic mélanges, featuring widespread serpentinized peridotite.
Rinaldi Ikhram, Takashi Hoshide, Tsukasa Ohba, Mega Fatimah Rosana, Adi Hardiyono   +4 more
doaj   +1 more source

Metabolic challenges and key players in serpentinite-hosted microbial ecosystems

Frontiers in Microbiology, 2023
Serpentinite-hosted systems are amongst the most challenging environments for life on Earth. Serpentinization, a geochemical alteration of exposed ultramafic rock, produces hydrothermal fluids enriched in abiotically derived hydrogen (H2), methane (CH4),
Rabja Maria Popall, Anne Postec, Aurélien Lecoeuvre, Marianne Quéméneur, Gaël Erauso   +4 more
doaj   +1 more source

Biodegradable Chitosan Films as Green Resists for Gold Nanowires Fabrication Through AFM‐Based Nanolithography

Advanced Materials Interfaces, EarlyView.
Schematic illustration of a sustainable nanofabrication process: chitosan derived from natural sources is used as a biodegradable thin film resist, patterned via Constant Pulse‐Assisted Force Lithography (CP‐AFL) to create tunable nanogrooves. These grooves template gold nanowire formation, enabling high‐resolution nanopatterning under ambient ...
Paolo Pellegrino, Lorenzo Vincenti, Isabella Farella, Valeria De Matteis, Mariafrancesca Cascione, Annalisa Bianco, Fabio Quaranta, Rosaria Rinaldi   +7 more
wiley   +1 more source

Advanced Design for Weakly Coupled Resonators by Automatic Active Optimization

Advanced Materials Technologies, EarlyView.
An Automatic Active Optimization (AAO) strategy integrates machine learning predictors and genetic algorithms in a closed‐loop workflow. By iteratively expanding its dataset with new discoveries, AAO overcomes the limits of conventional methods. This approach finds superior microstructural designs beyond the initial sample space. We demonstrate this on
Wei Yue, Yuan Gao, Fanping Sui, Jason Wang, Megan Teng, Peggy Tsao, Huicong Deng, Yande Peng, Liwei Lin   +8 more
wiley   +1 more source

Ultramafic Rocks and Their Alteration Products From Northwestern Allaqi Province, Southeastern Desert, Egypt: Petrology, Mineralogy, and Geochemistry

Frontiers in Earth Science, 2022
The ophiolitic rocks, island arc metasediments, and granitic rocks are encountered in the study of the Allaqi province. The present study concentrated on ultramafic rocks and their various forms of hydrothermal alteration.
A. M. Abdel-Rahman, H. M. El-Desoky, B. N. A. Shalaby, H. A. Awad, Antoaneta Ene, M. A. Heikal, H. El-Awny, W. Fahmy, S. A. Taalab, Hesham M. H. Zakaly, Hesham M. H. Zakaly   +10 more
doaj   +1 more source

Overcoming Printing and Interfacial Challenges in Liquid Metal Direct Writing for Integrated Stretchable Electronics

Advanced Materials Technologies, EarlyView.
Liquid metal direct writing is advanced from a technological and fundamental point. Utilizing a kinematic bed, printing on large surfaces with irregularities is enabled. Furthermore, a pressure‐driven flow during printing is discovered that affects the thickness of traces.
Maximilian Krack, Lennert Purnal, Parth Vinayakrao Sewlikar, Sam Cuyvers, Gus Geurts, Rathul Nengminza Sangma, Derese Desta, Dieter Reenaers, Bart Ruttens, Iris De Graeve, Tom Hauffman, Seppe Terryn, Bram Vanderborght, Michaël Daenen, Wim Deferme, Monika Rai   +15 more
wiley   +1 more source

A Petro‐Physical Model for Serpentinized Mantle and Origin of Natural Hydrogen in the Pyrenees

Geochemistry, Geophysics, Geosystems
The relationships between the serpentinized continental mantle in orogens, its geophysical signature at depth and hydrogen seepages are poorly understood.
Sepideh Pajang, Frédéric Mouthereau, Alexandra Robert, Ajay Kumar, Jean‐Paul Callot   +4 more
doaj   +1 more source