Results 131 to 140 of about 2,711,397 (376)

Structurally Colored Physically Unclonable Functions with Ultra‐Rich and Stable Encoding Capacity

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
This study reports a design strategy for generating bright‐field resolvable physically unclonable functions with extremely rich encoding capacity coupled with outstanding thermal and chemical stability. The optical response emerges from thickness‐dependent structural color formation in ZnO features, which are fabricated by physical vapor deposition ...
Abidin Esidir, Miaoning Ren, Sami Pekdemir, Mustafa Kalay, Nilgun Kayaci, Nail Gunaltay, Hakan Usta, Xian Huang, Mustafa Serdar Onses   +8 more
wiley   +1 more source

Quasinormal modes of black holes: The improved semianalytic approach [PDF]

, 2017
We extend the semianalytic technique of Iyer and Will for computing the complex quasinormal frequencies of black holes, $\ensuremath{\omega}$, by constructing the Pad\'e approximants of the (formal) series for ${\ensuremath{\omega}}^{2}$.
J. Matyjasek, M. Opala
semanticscholar   +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

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Photon Shells, Black Hole Shadows, and Accretion Toroids

The Astrophysical Journal Supplement Series
We analyze the properties of the Kerr black hole (BH) photon shell, focusing on the influence of aggregates of corotating and counterrotating toroids (ringed accretion disks, hereafter RAD), orbiting in the BH photon shell (photon shell “obscuration ...
D. Pugliese, Z. Stuchlík
doaj   +1 more source

Throat quantization of the Schwarzschild-Tangherlini(-AdS) black hole

EPJ Web of Conferences, 2018
By the throat quantization pioneered by Louko and Mäkelä, we derive the mass and area/entropy spectra for the Schwarzschild-Tangherlini-type asymptotically flat or AdS vacuum black hole in arbitrary dimensions. Using the WKB approximation for black holes
Maeda Hideki
doaj   +1 more source

Are LIGO's Black Holes Made from Smaller Black Holes? [PDF]

, 2017
One proposed formation channel for stellar mass black holes (BHs) is through hierarchical mergers of smaller BHs. Repeated mergers between comparable mass BHs leave an imprint on the spin of the resulting BH since the final BH spin is largely determined ...
M. Fishbach, D. Holz, B. Farr
semanticscholar   +1 more source

Critical phenomena in the AdS/CFT duality

, 2010
We review black holes with second-order phase transition in string theory (R-charged black holes and holographic superconductors) and review their static and dynamic critical phenomena.
Albash, Albash, Aprile, Behrndt, Buchel, Buchel, Cai, Cvetic, Cvetic, Franco, Gubser, Gubser, Hartnoll, Hartnoll, Herzog, Herzog, Hohenberg, Horowitz, Iqbal, Jain, Kraus, Maeda, Maeda, Maeda, Maeda, Maeda, Makoto Natsuume, Maldacena, Montull, Natsuume, Natsuume, Witten, Witten   +32 more
core   +1 more source

Photoswitchable Conductive Metal–Organic Frameworks

Advanced Functional Materials, EarlyView.
A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu, Mersad Mostaghimi, Abhinav Chandresh, Saibal Jana, Wolfgang Wenzel, Lars Heinke   +5 more
wiley   +1 more source

Scattering of two spinning black holes in post-Minkowskian gravity, to all orders in spin, and effective-one-body mappings [PDF]

, 2017
We demonstrate equivalences, under simple mappings, between the dynamics of three distinct systems—(i) an arbitrary-mass-ratio two-spinning-black-hole system, (ii) a spinning test black hole in a background Kerr spacetime, and (iii) geodesic motion in ...
J. Vines
semanticscholar   +1 more source