Results 131 to 140 of about 506,065 (397)

Distinctive Doping Behavior of Conjugated Polymers With Pendant‐Side Conjugation for Enhanced Thermoelectric Properties

open access: yesAdvanced Functional Materials, EarlyView.
Novel conjugated polymers with side‐chain π‐conjugation are developed to enhance organic thermoelectric properties. Remarkably, the pendant doping in the conjugated polymers preserved strong intermolecular ordering in the film states even at high FeCl3 dopant concentrations (16 – 32 mM), achieving a promising power factor > 10 µW m−1 K−2 across a wide ...
Hyeokjun Kim   +4 more
wiley   +1 more source

Semi-Empirical Estimates of the Cosmic Planet Formation Rate

open access: yesGalaxies
We devise and exploit a data-driven, semi-empirical framework of galaxy formation and evolution, coupling it to recipes for planet formation from stellar and planetary science, to compute the cosmic planet formation rate, and the properties of the ...
Andrea Lapi   +3 more
doaj   +1 more source

Terraforming Mars is not out of the question yet - and microscopic algae could help [PDF]

open access: yesTrakia Journal of Sciences, 2019
Recently some researchers have gathered around the claim that the likelihood for terraformation of Mars is slim, either because human technology is not up to the task, or the planet does not posses all the necessary resources to allow the process to be ...
Iv. Vasileva   +2 more
doaj   +1 more source

Formation and Structure of Low Density Exo-Neptunes

open access: yes, 2011
Kepler has found hundreds of Neptune-size (2-6 R_Earth) planet candidates within 0.5 AU of their stars. The nature of the vast majority of these planets is not known because their masses have not been measured.
Borucki   +31 more
core   +1 more source

Gifts from Exoplanetary Transits [PDF]

open access: yes, 2009
The discovery of transiting extrasolar planets has enabled us a number of interesting stduies. Transit photometry reveals the radius and the orbital inclination of transiting planets, and thereby we can learn the true mass and the density of respective ...
Miki Ishii   +3 more
core   +2 more sources

Prevalence of Earth-size planets orbiting Sun-like stars [PDF]

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2013
Significance A major question is whether planets suitable for biochemistry are common or rare in the universe. Small rocky planets with liquid water enjoy key ingredients for biology.
E. Petigura, A. Howard, G. Marcy
semanticscholar   +1 more source

Oxygen Doping Enables Tailored Built‐In Electric Fields in FeOCl/g‐C3N4 Heterojunctions for Enhanced Peroxymonosulfate Activation

open access: yesAdvanced Functional Materials, EarlyView.
Oxygen‐doping modulated g‐C3N4 support enables a strong built‐in electric field (BIEF) in FeOCl‐OCN.This enhanced BIEF induces the rearrangement of Fe(II)/Fe(III) in FeOCl, which subtly improves intermediates adsorption and also reduces the energy barrier of *O production, thereby achieving efficient PMS activation with 1O2 and Fe(IV)= O as the primary
Ying Zeng   +9 more
wiley   +1 more source

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

open access: yesAdvanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal   +10 more
wiley   +1 more source

High Pressure Melting Curve of Fe Determined by Inter‐Metallic Fast Diffusion Technique

open access: yesGeophysical Research Letters, 2023
The heat extracted from the core by the overlying mantle across the core‐mantle boundary controls the thermal evolution of the core. This in turn leads to the solidification of the inner core in association with the exsolution of light alloying elements ...
Innocent C. Ezenwa, Yingwei Fei
doaj   +1 more source

Planetary Transits Toward the Galactic Bulge [PDF]

open access: yes, 2000
The primary difficulty with using transits to discover extrasolar planets is the low probability a planet has of transiting its parent star. One way of overcoming this difficulty is to search for transits in dense stellar fields, such as the Galactic ...
B. Scott Gaudi   +2 more
core   +2 more sources

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