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Research abstract presenting petrographic and chemical analysis of amorphous silicate material in GEMS from chondritic porous interplanetary dust particles using TEM and NanoSIMS data to examine composition, formation conditions, and links to primitive solar system environments.
Authors: Birgit Schulz; Christian Vollmer; Jan Leitner; Lindsay P. Keller
Institutions: Institut für Mineralogie, Universität Münster; Max-Planck-Institut für Chemie; Astromaterials Research and Exploration Science (ARES) Division, NASA Johnson Space Center
Scientific Field: Cosmochemistry; Planetary Science; Mineralogy
Research Topic: Amorphous silicate material in GEMS from chondritic porous interplanetary dust particles
Document Type: Research abstract
Materials Studied: Chondritic porous interplanetary dust particles (CP-IDPs); GEMS (glass with embedded metal and sulfides)
Analytical Methods: Transmission Electron Microscopy (TEM); NanoSIMS isotopic analysis
Elements and Isotopes Analyzed: Major element/Si ratios; Fe/Si ratios; 15N and 13C isotopic compositions
Research Focus: Chemical composition and petrographic characteristics of amorphous silicate material
Associated Celestial Materials: Primitive chondritic meteorites
Funding Organization: Deutsche Forschungsgemeinschaft (DFG)
Sample Provider: NASA Astromaterials Acquisition and Curation Office
Referenced Literature: Keller & Messenger (2011); Hopp & Vollmer (2017); Bradley & Dai (2004); Bradley (1994); Vollmer et al. (2020); Messenger et al. (2015); Floss et al. (2006)
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Amorphous, fully-stoichiometric molybdenum oxide for high performance nonvolatile resistive switching memory: The role of stoichiometry on synaptic plasticity
Authors: Gion Kalemai; Konstantinos Aidinis; Michael-Alexandros Kourtis; Dimitris Davazoglou; Anastasia Soultati
Affiliations: Institute of Nanoscience and Nanotechnology (INN), National Center for Scientific Research Demokritos, Greece; University of Patras, Greece; Ajman University, United Arab Emirates; Institute of Informatics & Telecommunications, NCSR Demokritos, Greece
Country: Greece; United Arab Emirates
Field: Materials Science; Nanotechnology; Electronic Engineering; Neuromorphic Computing
Keywords: molybdenum oxide; MoO3; H-MoO3-x; memristor; resistive switching; stoichiometry; oxygen vacancies; synaptic plasticity; neuromorphic systems
Type of document: Scientific research article
Material system: Amorphous fully-stoichiometric MoO3 and hydrogenated sub-stoichiometric H-MoO3-x thin films
Methodology: Hot-wire chemical vapor deposition; electrical characterization of memristive devices
Device structure: Vertical two-terminal memristor
Performance metrics: Endurance 250 cycles; ON/OFF ratio ~10^3; retention ~3·10^4 s
Scope: Investigation of the influence of stoichiometry on resistive switching and artificial synaptic behavior
Topics: Petrographic Cometary Amorphous