Results 111 to 120 of about 234,306 (282)

Shapeshifting Nanocatalyst for CO2 Conversion

Advanced Materials, EarlyView.
A multi‐modal in situ characterization of Ag‐Cu nanoparticles during CO2 photoreduction sheds light on dynamic transformations occurring during reaction. The Cu(core)‐Ag(shell) nanoparticles present the Ag replacement by Cu atoms. Ag is trapped at the subsurface forming a Ag‐Cu‐O phase, and the nanoparticle spreads over the substrate.
Gustavo Zottis Girotto, Maximilian Jaugstetter, Dongwoo Kim, Lívia P. Matte, Tara P. Mishra, Mary Scott, Ruan M. Martins, André R. Muniz, Miquel Salmeron, Slavomir Nemsak, Fabiano Bernardi   +10 more
wiley   +1 more source

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. IV. Long-term Doppler Spectroscopy for 11 Stars Thought to Host Cool Giant Exoplanets

The Astrophysical Journal Supplement Series
Discovering and characterizing exoplanets at the outer edge of the transit method’s sensitivity has proven challenging owing to geometric biases and the practical difficulties associated with acquiring long observational baselines.
Paul A. Dalba, Stephen R. Kane, Howard Isaacson, Benjamin Fulton, Andrew W. Howard, Edward W. Schwieterman, Daniel P. Thorngren, Jonathan Fortney, Noah Vowell, Corey Beard, Sarah Blunt, Casey L. Brinkman, Ashley Chontos, Fei Dai, Steven Giacalone, Michelle L. Hill, Molly Kosiarek, Jack Lubin, Andrew W. Mayo, Teo Močnik, Joseph M. Akana Murphy, Erik A. Petigura, Malena Rice, Ryan A. Rubenzahl, Judah Van Zandt, Lauren M. Weiss, Diana Dragomir, David Kipping, Matthew J. Payne, Arpita Roy, Alex Teachey, Steven Villanueva Jr.   +31 more
doaj   +1 more source

Evaluation of the KASI Det

Journal of Astronomy and Space Sciences, 2018
The characterization of detectors installed in space- and ground-based instruments is important to evaluate the system performance. We report the development of a detector performance test system for astronomical applications using the Andor iKon M CCD
Young Sam Yu, Jinsol Kim, Chan Park, Woong-Seob Jeong, Minjin Kim, Seonghwan Choi, Sung-Joon Park   +6 more
doaj   +1 more source

Impact of the initial disk mass function on the disk fraction

, 2015
The disk fraction, the percentage of stars with disks in a young cluster, is widely used to investigate the lifetime of the protoplanetary disk, which can impose an important constraint on the planet formation mechanism.
Ohsawa, Ryou, Onaka, Takashi, Yasui, Chikako   +2 more
core   +1 more source

Detecting the Six Polytypes of Five‐Layer Graphite

Advanced Materials, EarlyView.
The six possible periodic crystals—so‐called polytypes of Penta layer graphene are identified using Raman, second harmonic, and electric surface potential measurements. The measurements reveal the polytypes’ abundance, relative stability, and annihilation dynamics, crucial for future multiferroic SlideTronic applications.
Nirmal Roy, Shaked Amitay, Simon Salleh Atri, Harel Kabla, Oren Ben Moshe, Moshe Ben Shalom   +5 more
wiley   +1 more source

Spatially Encoded Polaritonic Ultra‐Strong Coupling in Gradient Metasurfaces with Epsilon‐Near‐Zero Modes

Advanced Materials, EarlyView.
Dielectric dual gradient metasurfaces supporting quasi‐bound‐states‐in‐the‐continuum are leveraged to spatially encode both the spectral and coupling parameter space and demonstrate ultra‐strong coupling to an epsilon‐near‐zero mode in an ultra‐thin SiO2 layer.The platform achieves exceptional mode overlap, reaching a normalized coupling strength of η =
Enrico Baù, Andreas Aigner, Jonas Biechteler, Connor Heimig, Thomas Weber, Thorsten Gölz, Stefan A. Maier, Andreas Tittl   +7 more
wiley   +1 more source

How Are the Abnormally Hot Chromosphere and Corona Heated by the Solar Magnetic Fields?

The Astrophysical Journal
The corona is a structure possessed by stars, including the Sun. The abnormal heating of the solar corona and chromosphere is one of the greatest mysteries in modern astronomy.
K. J. Li, J. C. Xu, W. Feng, J. L. Xie, X. J. Shi, L. H. Deng   +5 more
doaj   +1 more source

Flux and color variations of the quadruply imaged quasar HE 0435-1223

, 2011
We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m telescope at the La Silla Observatory.
Ricci, D., Anguita A., Timo
openaire   +4 more sources

Reconfigurable Magnetotransport in MnBi2Te4 via Gate and Magnetic Field Tuning

Advanced Materials, EarlyView.
Gate‐tunable magnetoresistance sign reversal under in‐plane magnetic fields is observed in an ultrathin MnBi2Te4 device, arising from spin reorientation and distinct scattering mechanisms. Moreover, angular‐dependent measurements reveal clear gate‐controlled magnetotransport anisotropy, underscoring the strong coupling between gating, spin ...
Yuang Jie, Xiaofan Cai, Yijie Lin, Kenji Watanabe, Takashi Taniguchi, Jiaqiang Yan, Dmitry Ovchinnikov, Ahmet Avsar   +7 more
wiley   +1 more source

Anisotropic cosmological models with two fluids

, 2018
In this paper, aniostropic dark energy cosmological models have been constructed in a Bianchi-V space-time with the energy momentum tensor consisting of two non-interacting fluids namely bulk viscous fluid and dark energy fluid.
Mishra, B., Pacif, S. K. J., Ray, Pratik P.   +2 more
core   +2 more sources