Interstellar Analogs From Defective Carbon Nanostructures Account for Interstellar Extinction

Tan, Zhenquan; Chihara, H.; Koike, C.; Abe, Hiroya; Kaneko, Kenji; Sato, Kazuyoshi; Ohara, Satoshi

doi:10.1088/0004-6256/140/5/1456

Cited by 19 publications

(14 citation statements)

References 25 publications

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“…1 this study). The appearance/morphology of graphite in ALH 84001 is unusual although similar morphologies have been described in terrestrial systems, meteorites and impact studies (Kovalevski et al 2001;Buseck et al 1997;Smith and Buseck 1981;Tan et al 2010). Such structures have been given a variety of names including: mesoporous graphite, nano-graphite, nano-onions, carbon nanorings, and fulleroids (Kovalevski et al 2001;Buseck et al 1997;Smith and Buseck 1981;Tan et al 2010).…”

Section: Discussionsupporting

confidence: 63%

“…The appearance/morphology of graphite in ALH 84001 is unusual although similar morphologies have been described in terrestrial systems, meteorites and impact studies (Kovalevski et al 2001;Buseck et al 1997;Smith and Buseck 1981;Tan et al 2010). Such structures have been given a variety of names including: mesoporous graphite, nano-graphite, nano-onions, carbon nanorings, and fulleroids (Kovalevski et al 2001;Buseck et al 1997;Smith and Buseck 1981;Tan et al 2010). Experimentally produced graphite hollow spheres, capsules, and solid graphite particles below 200 nm in diameter have Raman spectra similar to those in Figure 1, spectra i-iv, and in previous studies of ALH 84001 (Ferrari and Robertson 2000;Pimenta et al 2007;Shi et al 2010;Steele et al 2007).…”

Section: Discussionsupporting

confidence: 63%

“…None of these experimental, meteoritic or terrestrial systems appears specifically applicable to the conditions experienced by ALH 84001. However, the underlying trend of each of these instances is that in all cases high temperatures are required in their formation (Tan et al 2010;Shi et al 2010;Kovalevski et al 2001;Buseck et al 1997;Smith and Buseck 1981). Figure 4d (red arrow) shows the presence of similar "platelets" of graphene sheets as those…”

Section: Discussionmentioning

confidence: 90%

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Graphite in the martian meteorite Allan Hills 84001

Steele

McCubbin

Fries

et al. 2012

American Mineralogist

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We use confocal Raman imaging spectroscopy and transmission electron microscopy to study the martian meteorite Allan Hills (ALH) 84001, reported to contain mineral assemblages within carbonate globules (carbonate + magnetite), interpreted as potential relict signatures of ancient martian biota. Models for an abiologic origin for these assemblages required the presence of graphite, and this study is the first report of graphite within ALH 84001. The graphite occurs as hollow spheres (nano-onions), filaments, and highly crystalline particles in intimate association with magnetite in the carbonate globules. In addition to supporting an abiologic origin for the carbonate globule assemblages in ALH 84001, this work proves that there is an inventory of reduced-carbon phases on Mars that has not yet been thoroughly investigated.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 90%

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Graphite in the martian meteorite Allan Hills 84001

Steele

McCubbin

Fries

et al. 2012

American Mineralogist

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“…This finding enables us to infer that such simple and intense collisions induced by super-high-energy ball milling can be used to control the range of charge and spin states in transition metal oxides with high pressure. We believe that property tuning for many functional materials such as graphite 25 and graphene 26 with high pressure will be realized and that various high pressure materials 27 including silica 28 and titania 29 with α-PbO 2 structures will be synthesized based on the super-high-energy ball milling process.…”

Section: Resultsmentioning

confidence: 99%

Emergence of ferromagnetism due to charge transfer in compressed ilmenite powder using super-high-energy ball milling

Ohara

Naka

Sunakawa

et al. 2020

Sci Rep

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Powder x-ray diffraction patterns were measured for the samples filled inside a capillary with an inner diameter of 200 μm using a synchrotron x-ray source (λ = 0.65296 Å) in the BL15XU beam line at SPring-8, Harima, Japan 30. SeM-eDS measurements. A small piece of the produced powder was suspended in ethanol by ultrasonication until a homogeneous suspension was obtained. The suspension was dropped onto an aluminium sample holder, dried, and examined by scanning electron microscopy (SEM) with electron dispersion spectroscopy (EDS) operated at 15 kV (JSM-7600F, JEOL). Mössbauer measurements. We measured the 57 Fe Mössbauer spectra using the constant acceleration method, using a 57 Co(Rh) source and an α-Fe a reference. γ-Ray radiation was monitored with a multi-channel analyser (MCA-7700, Seiko EG&G) using 512 channels for each spectrum. The obtained spectra were analysed by Lorentzian fitting using Mösswinn 3.0i XP. Magnetic measurements. We measured the magnetic properties using a conventional superconducting quantum interference device (SQUID) magnetometer (MPMS-XL, Quantum Design) under a magnetic field of up to 50 kOe in the temperature range from 5 to 300 K for dc-magnetization.

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“…The Allende meteorite and the Martian meteorite Allan Hills (ALH) 84001 host graphitic nanocarbons 6 7 , which are formed by induced shock events between 2–6 GPa 8 . In a previous study, we reported a simple shock event approach that was inspired by the Allende meteorite to produce sophisticated carbon nanomaterials including carbon nanotubes, carbon onions, and carbon nanorings 19 20 . These materials were synthesised by a collision shock between steel balls using a super high-speed ball-milling process.…”

mentioning

confidence: 99%

Quenching ilmenite with a high-temperature and high-pressure phase using super-high-energy ball milling

Hashishin

Tan

Yamamoto

et al. 2014

Sci Rep

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The mass production of highly dense oxides with high-temperature and high-pressure phases allows us to discover functional properties that have never been developed. To date, the quenching of highly dense materials at the gramme-level at ambient atmosphere has never been achieved. Here, we provide evidence of the formation of orthorhombic Fe2TiO4 from trigonal FeTiO3 as a result of the high-temperature (>1250 K) and high-pressure (>23 GPa) condition induced by the high collision energy of 150 gravity generated between steel balls. Ilmenite was steeply quenched by the surrounding atmosphere, when iron-rich ilmenite (Fe2TiO4) with a high-temperature and high-pressure phase was formed by planetary collisions and was released from the collision points between the balls. Our finding allows us to infer that such intense planetary collisions induced by high-energy ball milling contribute to the mass production of a high-temperature and high-pressure phase.

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Interstellar Analogs From Defective Carbon Nanostructures Account for Interstellar Extinction

Cited by 19 publications

References 25 publications

Graphite in the martian meteorite Allan Hills 84001

Graphite in the martian meteorite Allan Hills 84001

Emergence of ferromagnetism due to charge transfer in compressed ilmenite powder using super-high-energy ball milling

Quenching ilmenite with a high-temperature and high-pressure phase using super-high-energy ball milling

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