Results 31 to 40 of about 3,944,107 (299)

Structural and Optical Properties of Nanocrystalline Pbs Thin Films Prepared by Microwave-Assisted Chemical Bath Deposition

open access: yesEurasian Journal of Science and Engineering, 2022
Nanocrystalline lead sulfide (PbS) thin films have been successfully deposited onto glass substrate via microwave assisted chemical bath deposition.
Muhammed Husham
doaj  

Optical evidence for blue shift in topological insulator bismuth selenide in the few-layer limit [PDF]

open access: yes, 2017
Optical bandgap properties of high-quality few-layer topological insulator Bi2Se3 thin films are investigated using broadband absorption spectroscopy. We provide direct optical evidence for blue shift in the bulk bandgap of Bi2Se3 as it approaches the ...
Yub Raj Sapkota   +4 more
semanticscholar   +1 more source

Spectrally Stable Blue Light-Emitting Diodes Based on All-Inorganic Halide Perovskite Films

open access: yesNanomaterials, 2022
Substantial progress has been made in perovskite light-emitting diodes (PeLEDs), but the fabrication of high-performance blue PeLEDs still remains a challenge due to its low efficiency, spectral instability and short operational lifetime.
Huidan Zhang   +8 more
doaj   +1 more source

Spectral Shifts of Nonadiabatic High-Order Harmonic Generation

open access: yesApplied Sciences, 2013
High-order harmonic generation (HHG) is a nonlinear nonperturbative process in ultrashort intense laser-matter interaction. It is the main source of coherent attosecond (1 as = 10−18 s) laser pulses to investigate ultrafast electron dynamics.
André D. Bandrauk, Xue-Bin Bian
doaj   +1 more source

Role of Bi3+ ions on structural, optical, photoluminescence and electrical performance of Cd0.9-xZn0.1BixS QDs

open access: yesSN Applied Sciences, 2021
In this work, the Cd0.9-xZn0.1BixS QDs with different compositions of Bi3+ ions (0 ≤ x ≤ 0.05) were synthesized using a facile chemical route. The prepared QDs were characterized for analyzing the structural, morphological, elemental, optical, band gap ...
A. Krishnamoorthy   +3 more
doaj   +1 more source

Effect of BaO Content on the Photoluminescence Properties of Mn2+ and Eu2+-Codoped Sr3−xBaxMgSi2O8 Phosphors

open access: yesInorganics
In this study, Mn2+ and Eu2+-codoped Sr3−xBaxMgSi2O8 (x = 0–1.5) phosphors were synthesized at 1400 °C under a reducing atmosphere composed of 5% H2 and 95% N2 to produce materials with blue light emission.
Shu-Han Liao   +3 more
doaj   +1 more source

Blue and red shifted temperature dependence of implicit phonon shifts in graphene [PDF]

open access: yesMaterials Research Express, 2017
We have calculated the implicit shift for various modes of frequency in a pure graphene sheet. Thermal expansion and Grüneisen parameter which are required for implicit shift calculation have already been studied and reported. For this calculation, phonon frequencies are obtained using force constants derived from dynamical matrix calculated using VASP
Sarita Mann, V K Jindal
openaire   +2 more sources

Blue shift of CdSe/ZnS nanocrystal-labels upon DNA-hybridization

open access: yesJournal of Nanobiotechnology, 2008
Luminescence color multiplexing is one of the most intriguing benefits, which might occur by using semiconductor Quantum Dots (QDs) as labels for biomolecules.
Palme Klaus   +3 more
doaj   +1 more source

Sand-Dust Image Restoration Based on Reversing the Blue Channel Prior

open access: yesIEEE Photonics Journal, 2020
Images acquired under sand-dust weather conditions are severely degraded, with low contrast and severe color shift. The reason is that, due to the influence of sand-dust particles, light is scattered and absorbed, resulting in a blurred image and low ...
GuXue Gao   +4 more
doaj   +1 more source

Time-Translation Invariance of Scattering Maps and Blue-Shift Instabilities on Kerr Black Hole Spacetimes [PDF]

open access: yes, 2015
In this paper, we provide an elementary, unified treatment of two distinct blue-shift instabilities for the scalar wave equation on a fixed Kerr black hole background: the celebrated blue-shift at the Cauchy horizon (familiar from the strong cosmic ...
Mihalis Dafermos   +1 more
semanticscholar   +1 more source

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