Results 11 to 20 of about 1,003,380 (249)

23Na relaxometry: An overview of theory and applications

open access: yesMagnetic Resonance Letters, 2023
23Na is a nuclear magnetic resonance (NMR)-active isotope with a nuclear spin quantum number of 3/2. 23Na relaxation phenomenon is at the core of 23Na NMR measurement and analysis.
Yifan Song   +4 more
doaj   +1 more source

Electrochemiluminescence of Semiconductor Quantum Dots and Its Biosensing Applications: A Comprehensive Review

open access: yesBiosensors, 2023
Electrochemiluminescence (ECL) is the chemiluminescence triggered by electrochemical reactions. Due to the unique excitation mode and inherent low background, ECL has been a powerful analytical technique to be widely used in biosensing and imaging. As an
Hui Sun, Ping Zhou, Bin Su
doaj   +1 more source

Phonon-assisted up-conversion photoluminescence of quantum dots

open access: yesNature Communications, 2021
Up-conversion photoluminescence in colloidal quantum dots is generally believed to be mediated by thermal activation from defect states. Here, the authors reveal that highly-efficient up-conversion photoluminescence instead is related to electron-phonon ...
Zikang Ye   +6 more
doaj   +1 more source

Imaging electrochemiluminescence layer to dissect concentration-dependent light intensity for accurate quantitative analysis

open access: yesAdvanced Sensor and Energy Materials, 2022
As one of most advanced transduction techniques, electrochemiluminescence (ECL), such as that generated by tris(2,2′-bipyridyl)ruthenium (Ru(bpy)32+), has been extensively used in chemical sensing and analysis, but the reaction mechanism has not been ...
Wen-Xuan Fu   +3 more
doaj   +1 more source

Anomalous efficiency elevation of quantum-dot light-emitting diodes induced by operational degradation

open access: yesNature Communications, 2023
Quantum-dot light-emitting diodes promise a new generation of high-performance and solution-processed electroluminescent light sources. Understanding the operational degradation mechanisms of quantum-dot light-emitting diodes is crucial for their ...
Siyu He   +10 more
doaj   +1 more source

Molecular stacking controlling coherent and incoherent singlet fission in polymorph rubrene single crystals

open access: yesAggregate, 2023
Singlet fission (SF) is an appealing process where one photoexcited singlet transforms to two triplets, which can overcome thermalization energy loss and improve solar cell efficiency.
Yanping Liu   +4 more
doaj   +1 more source

Coupled Electronic and Anharmonic Structural Dynamics for Carrier Self‐Trapping in Photovoltaic Antimony Chalcogenides

open access: yesAdvanced Science, 2022
V–VI antimony chalcogenide semiconductors have shown exciting potentials for thin film photovoltaic applications. However, their solar cell efficiencies are strongly hampered by anomalously large voltage loss (>0.6 V), whose origin remains controversial ...
Weijian Tao   +9 more
doaj   +1 more source

Highly Resolved and Robust Dynamic X‐Ray Imaging Using Perovskite Glass‐Ceramic Scintillator with Reduced Light Scattering

open access: yesAdvanced Science, 2021
All‐inorganic perovskite quantum dots (QDs) CsPbX3 (X = Cl, Br, and I) have recently emerged as a new promising class of X‐ray scintillators. However, the instability of perovskite QDs and the strong optical scattering of the thick opaque QD scintillator
Wenbo Ma   +14 more
doaj   +1 more source

The mechanism of the NH4 ion oscillatory transport across the excitable cell membrane [PDF]

open access: yesZbornik Matice Srpske za Prirodne Nauke, 2005
This paper presents results on typical oscillations of the membrane potential induced by the excitation of the cell membrane by different concentrations of the NH4Cl solution.
Radenović Čedomir N.   +4 more
doaj   +1 more source

Excited to excited state scattering using weak measurements [PDF]

open access: yes, 2015
Weak measurements are a subset of measurement processes in quantum mechanics wherein the system which is being measured interacts very weakly with the measuring apparatus.
Narayanan, Andal, U, Satya Sainadh
core   +2 more sources

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