Results 211 to 220 of about 3,651,668 (354)
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner+9 more
wiley +1 more source
Identification and Reversible Optical Switching of NV+ Centers in Diamond
NV+ centers in diamond are predicted to coexist with NV0 and NV– centers, but direct experimental confirmation remains challenging. Using positron annihilation spectroscopy with in situ light illumination, a charge transition NV+/0 is observed at 1.234(8) eV.
Marcel Dickmann+13 more
wiley +1 more source
Locally Optimally Emitting Clouds and the Variable Broad Emission Line Spectrum of NGC 5548 [PDF]
K. T. Korista, M. R. Goad
openalex +1 more source
Compositing Effect Leads to Extraordinary Performance in GeSe‐Based Thermoelectrics
Rhombohedral GeSe is rationally designed with (GeSe)0.9(AgBiTe2)0.1‐1.5 mol.% SnSe, achieving a peak ZT of 1.31 at 623 K. Forming a composite with SnSe establishes interfaces with strong phonon scattering and weak electron scattering. Multiscale defects lead to an ultra‐low lattice thermal conductivity (0.26 W m−1 K−1), approaching the amorphous limit.
Min Zhang+14 more
wiley +1 more source
Triple-doped Dy<sup>3+</sup>/Tb<sup>3+</sup>/Eu<sup>3+</sup> activated Na<sub>2</sub>Ca<sub>4</sub>(PO<sub>4</sub>)<sub>3</sub>F halo-phosphors for next-generation WLEDs and solar cell efficiency enhancement. [PDF]
Tikale RV+3 more
europepmc +1 more source
WHAT DOMINATES THE CORONAL EMISSION SPECTRUM DURING THE CYCLE OF IMPULSIVE HEATING AND COOLING?
S. Bradshaw, J. Klimchuk
semanticscholar +1 more source
Which Chromium–Sulfur Compounds Exist as 2D Material?
2D chromium sulfides synthesized using molecular beam epitaxy on graphene. Structural characterization reveals two novel 2D materials, Cr2S3‐2D, which lacks a direct bulk counterpart, and Cr223S${\rm Cr}_{2\frac{2}{3}}{\rm S}$4‐2D, a minimum thickness version of Cr5S6. However, attempts to synthesize CrS2 are unsuccessful. Both new 2D phases are stable
Affan Safeer+5 more
wiley +1 more source
A Broad F[CLC]e[/CLC] Kα Emission Line in the X-Ray Spectrum of the Quasar 3C 273 [PDF]
Tahir Yaqoob, P. J. Serlemitsos
openalex +1 more source
Heterojunctions combining halide perovskites with low‐dimensional materials enhance optoelectronic devices by enabling precise charge control and improving efficiency, stability, and speed. These synergies advance flexible electronics, wearable sensors, and neuromorphic computing, mimicking biological vision for real‐time image analysis and intelligent
Yu‐Jin Du+11 more
wiley +1 more source