Results 171 to 180 of about 11,709 (246)

Advanced aqueous alteration in primitive meteorites: Micro‐ to nanoscale studies of CR1 iron sulfides

Meteoritics &Planetary Science, EarlyView.
Abstract This study documents micro‐ to nanoscale observations of primary nebular and secondary parent body iron sulfides in the CR1 GRO 95577. Despite the extensive alteration of the bulk sample, some primary sulfides managed to avoid alteration, having originally formed in the solar nebula during chondrule formation by either fission‐sulfidization or
S. A. Singerling
wiley   +1 more source

The role of composition in the spectral evolution of carbonaceous asteroids as informed by Bennu sample return

Meteoritics &Planetary Science, EarlyView.
Abstract Near‐Earth rubble‐pile asteroids Bennu and Ryugu are part of the carbonaceous taxonomic complex (C‐complex), and samples returned from both bodies resemble the most aqueously altered carbonaceous chondrites. However, telescopic and spacecraft visible–near infrared (VIS–NIR) reflectance spectra of Ryugu exhibit a red (positive) spectral slope ...
Ralph E. Milliken, Takahiro Hiroi, Victoria E. Hamilton, Cody D. Schultz, Ed A. Cloutis, Hannah H. Kaplan, Melissa K. Kontogiannis, Nathalia Vega‐Santiago, Dani N. DellaGiustina, Harold C. Connolly Jr., Dante S. Lauretta   +10 more
wiley   +1 more source

Real-time wide-field fluorescence lifetime imaging via single-snapshot acquisition for biomedical applications. [PDF]

Photonix
Pandey V, Millar E, Erbas I, Chavez L, Radford J, Crosbourne I, Madhusudan M, Taylor GG, Yuan N, Bruschini C, Radev ST, Barroso MM, Tobin A, Michalet X, Charbon E, Faccio D, Intes X.   +16 more
europepmc   +1 more source

Evidence of a local BCC‐type coordination of cobalt in FCC taenite of iron meteorites

Meteoritics &Planetary Science, EarlyView.
Abstract Ni, Co, and Fe K‐edge X‐ray absorption fine structure (XAFS) measurements were performed, revealing an unexpected local structure around Co in well‐known iron and stony‐iron meteorites. Cobalt is enriched in kamacite but remains in taenite at concentrations of at least 0.3 atom%.
Kanako Yoshihara, Akira Yoshiasa, Huimin Shao, Makoto Tokuda, Ginga Kitahara, Hiroshi Isobe   +5 more
wiley   +1 more source

Transparent Conductive Copper-Doped Zinc Oxide (ZnO:Cu) Thin Films: PVco-D Fabrication and Applications in Perovskite Solar Cells. [PDF]

Materials (Basel)
Mientki M, Zawadzka A, Kowalska M, Zawadzki M, Tarbi A, Sahraoui B, Płóciennik P.   +6 more
europepmc   +1 more source

Mineralogy, mineral chemistry, and redox equilibria in ten aggregate particles from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract Examination of 10 Bennu aggregate particles has revealed the presence of many phases which taken together can provide constraints on the oxygen fugacity (fO2) of Bennu samples. Phyllosilicates (saponite and serpentine), carbonates, oxides (magnetite, chromite), sulfides (pyrrhotite, pentlandite), phosphate (hydroxyapatite, Na‐Mg‐phosphate ...
K. Righter, J. Gorce, L. Le, K. Thomas‐Keprta, Z.E. Wilbur, L.P. Keller, Z. Gainsforth, T.J. McCoy, T.J. Zega, S.S. Russell, H.C. Connolly Jr., D.S. Lauretta   +11 more
wiley   +1 more source

Large-amplitude variability driven by giant dust storms on a planetary-mass companion. [PDF]

Sci Adv
Tan X, Zhang X, Marley MS, Zhou Y, Lew BWP, Miles BE, Batalha NE, Biller BA, Chauvin G, Hinkley S, Hoch KKW, Manjavacas E, Metchev S, Petrus S, Rickman E, Skemer A, Suárez G, Sutlieff BJ, Vos JM, Whiteford N.   +19 more
europepmc   +1 more source

Evaluating maturity of organic matter in hydrated C1 and CM‐like clasts and a dehydrated clast within a polymict eucrite and a howardite

Meteoritics &Planetary Science, EarlyView.
Abstract Volatile‐rich xenolithic clasts in different types of brecciated meteorites represent unique pristine solar system material. This study investigates the maturity and thermal history of organic matter using Raman spectroscopy and aqueous alteration effects using infrared spectroscopy in the matrix of 15 volatile‐rich clasts (C1 and CM‐like ...
Swarna Prava Das, Alessandro Maturilli, Aurélie Van den Neucker, Markus Patzek, Dipak Kumar Panda, Gopal K. Pradhan, Guneshwar Thangjam, Surya Snata Rout   +7 more
wiley   +1 more source

Raman analysis of organic refractory materials after energetic processing: Evidence for amorphous carbon on TNOs and comets

Meteoritics &Planetary Science, EarlyView.
Abstract Amorphous carbon (αC) is found in various extraterrestrial particles, including those thought to originate from the outer Solar System. αC can form through two main processes involving C‐rich materials: exposure to energetic charged particles and thermal processing.
M. Germanà, A. Vyjidak, G. A. Baratta, B. M. Giuliano, R. G. Urso, C. Scirè, D. Fulvio, T. Grassi, P. Jusko, P. Caselli, M. E. Palumbo   +10 more
wiley   +1 more source

Insights into Native Single-Atom Electrocatalyst Site Structures. [PDF]

ACS Nano
Zachman MJ, Hafiz H, O'Leary CM, Lim C, Chung DY, Li S, Park S, Kim J, Cullen DA, Holby EF, Stamenkovic VR.   +10 more
europepmc   +1 more source