Results 161 to 170 of about 2,819,674 (325)

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source

Phase transition and heat engine efficiency of phantom AdS black holes

European Physical Journal C: Particles and Fields, 2018
Phase transition and heat engine efficiency of phantom AdS black holes are investigated with peculiar properties found. In the non-extended phase space, we probe the possibility of T–S criticality in both the canonical ensemble and grand-canonical ...
Jie-Xiong Mo, Shan-Quan Lan
doaj   +1 more source

Shadows of Multi-Black Holes: Analytic Exploration

, 2012
Shadows of multi-black holes have structures distinct from the mere superposition of the shadow of a single black hole: the eyebrow-like structures outside the main shadows and the deformation of the shadows.
Chiba, Takeshi, Nitta, Daisuke, Sugiyama, Naoshi, Yumoto, Akifumi   +3 more
core   +1 more source

High‐Resolution Characterization of Protein‐Conjugated, mRNA‐Loaded Lipid Nanoparticles by Analytical Ultracentrifugation

Advanced Functional Materials, EarlyView.
Lipid nanoparticles containing messenger RNA are characterized by sedimentation velocity analytical ultracentrifugation using UltraScan's new Custom Grid algorithm to provide multi‐dimensional distributions for partial specific volume (particle density), molar mass, sedimentation, diffusion, and hydrodynamic radius.
Sophia Bird, Connor Smith, Nahal Habibi, Samantha Rivera, Saeed Mortezazadeh, Reece Martin, Benjamin M. Geilich, Gilles Besin, Borries Demeler   +8 more
wiley   +1 more source

Hawking radiation power equations for black holes

Nuclear Physics B, 2017
We derive the Hawking radiation power equations for black holes in asymptotically flat, asymptotically Anti-de Sitter (AdS) and asymptotically de Sitter (dS) black holes. This is done by using the greybody factor for these black holes.
Ravi Mistry, Sudhaker Upadhyay, Ahmed Farag Ali, Mir Faizal   +3 more
doaj   +1 more source

Accretion, Primordial Black Holes and Standard Cosmology

, 2011
Primordial Black Holes evaporate due to Hawking radiation. We find that the evaporation time of primordial black holes increase when accretion of radiation is included.Thus depending on accretion efficiency more and more number of primordial black holes ...
A Barrau, A Polnarev, AS Majumdar, AS Majumdar, B NAYAK, B Nayak, B Ya, BJ Carr, BJ Carr, BJ Carr, BJ Carr, CO Lousto, D Blais, D Blais, D La, D Page, H Kodma, ID Novikov, J MacGibbon, JD Barrow, JH MacGibbon, KJ Mack, L P SINGH, L Susskind, MY Kholpov, MY Kholpov, S Wienberg, SW Hawking, SW Hawking   +28 more
core   +1 more source

Asymptotic black holes [PDF]

Classical and Quantum Gravity, 2017
Following earlier works on the KMY model of black-hole formation and evaporation, we construct the metric for a matter sphere in gravitational collapse, with the back-reaction of pre-Hawking radiation taken into consideration. The mass distribution and collapsing velocity of the matter sphere are allowed to have an arbitrary radial dependence.
openaire   +2 more sources

Broadband, Flexible, Skin‐Compatible Carbon Dots/Graphene Photodetectors for Wearable Applications

Advanced Functional Materials, EarlyView.
Broadband, flexible photodetectors integrating nitrogen‐rich carbon dots with single‐layer graphene on plastic substrates are demonstrated. A biocompatible chitosan–glycerol electrolyte enables efficient low‐voltage gating and on‐skin operation. The devices exhibit ultraviolet‐to‐near‐infrared response, mechanical robustness under bending, and verified
Nouha Loudhaief, Petr Rozhin, Ilaria Bertuol, Ali Raza, Leonardo Viti, Subhankar Roy, Enrico Cavarzerani, Luca Sbuelz, Matteo Brilli, Andrea Serinolli, Jacopo Nicoletti, Riccardo Piccoli, Sebastián Castilla, Simone Dal Zilio, Enrique Rodríguez‐Castellón, Miriam Serena Vitiello, Maurizio Selva, Flavio Rizzolio, Alvise Perosa, Giovanni Antonio Salvatore, Domenico De Fazio   +20 more
wiley   +1 more source

Black Hole Accretion and Spin-up through Stellar Collisions in Dense Star Clusters

The Astrophysical Journal
Dynamical interactions in dense star clusters could significantly influence the properties of black holes, leaving imprints on their gravitational-wave signatures.
Fulya Kıroğlu, Kyle Kremer, Sylvia Biscoveanu, Elena González Prieto, Frederic A. Rasio   +4 more
doaj   +1 more source

Intrabandgap States Engineering in Functionalized Nanodiamond to Generate Solvated Electrons for Photocatalysis Under Solar Illumination

Advanced Functional Materials, EarlyView.
The negative electron affinity of diamond allows to emit highly reductive electrons. By introducing intra‐bandgap states and an optimized electron transfer mechanism by surface functionalization with Ru(bpy)3, the formation of solvated electrons is achieved upon solar irradiation.
Benjamin Kiendl, Arsène Chemin, Adam H. Day, Rocio B. Rodriguez, Sneha Choudhury, Franziska Buchner, Kaan Atak, Christoph Merschjann, Emina Hadzifejzovic, Tim D. W. Claridge, Karin Larsson, Amélie Venerosy, Mailis M. Lounasvuori, Natalia Zabarska, Boyan Iliev, Thomas J. S. Schubert, Hugues A. Girard, Jean‐Charles Arnault, John S. Foord, Tristan Petit, Anke Krueger   +20 more
wiley   +1 more source