Results 61 to 70 of about 240,081 (351)

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

Advanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu, Hao Wu, Hoi Ying Chung, Yun Hau Ng   +3 more
wiley   +1 more source

Ultra‐Effective Light‐Activated Antibacterial Activity via Carboxyl Functionalized Graphene Quantum Dots and Films

Advanced Functional Materials, EarlyView.
Carboxyl‐functionalized graphene quantum dots (cGQDs) exhibit high singlet oxygen quantum yield due to strong spin–orbit coupling. cGQDs achieve minimum bactericidal concentration of only 0.4 µg mL−1 against S. aureus under low‐intensity illumination.
Muhammad Hassnain, Laure S. van Hofwegen, Humeyra Nur Kaleli, Temirlan Kubanaliev, Zafer Eroglu, Asim Onal, Payal P. S. Balraadjsing, Onder Metin, Fahri Alkan, Sebastian A. J. Zaat, Sedat Nizamoglu   +10 more
wiley   +1 more source

ANALYSIS OF THE INFLUENCE OF GOLD NANOPARTICLE ADDITION TO PHOTOLUMINESCENCE EMISSION INTENSITY AND DECAY TIME OF 618-CDSE QUANTUM DOTS

Spektra: Jurnal Fisika dan Aplikasinya, 2018
Abstrak Telah dilakukan pencampuran nanopartikel emas dengan kuantum dot CdSe 618. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penambahan nanopartikel emas terhadap intensitas emisi dan waktu peluruhan fotoluminesensi kuantum dot CdSe ...
Muhammad Lawrence Pattersons, Isnaeni Isnaeni   +1 more
doaj   +1 more source

Making Graphene Nanoribbons Photoluminescent [PDF]

Nano Letters, 2017
We demonstrate the alignment-preserving transfer of parallel graphene nanoribbons (GNRs) onto insulating substrates. The photophysics of such samples is characterized by polarized Raman and photoluminescence (PL) spectroscopies. The Raman scattered light and the PL are polarized along the GNR axis.
Sayed Khalil Alavi, Sayed Khalil Alavi, Alexander Fedorov, Alexander Fedorov, P.H.M. van Loosdrecht, Felix R. Fischer, Alexander Grüneis, Klaus Meerholz, Andrea Bliesener, Klas Lindfors, Jingyi Zhu, Luca Petaccia, Danny Haberer, S. Michel, Raphael German, Dirk Hertel, Markus Pfeiffer, Boris V. Senkovskiy   +17 more
openaire   +6 more sources

Inter‐Layer Diffusion of Excitations in 2D Perovskites Revealed by Photoluminescence Reabsorption

Advanced Functional Materials, EarlyView.
Inter‐layer diffusion of photoexcitations is monitored in thin films of the 2D perovskite (PEA)2PbI4 by tracking time‐dependent changes in photoluminescence spectra induced by photon reabsorption effects. A low out‐of‐plane excitation diffusion coefficient of 0.26 × 10−4 cm2 s−1 is determined through 1D diffusion modeling.
Jiaxing Du, Marcello Righetto, Manuel Kober‐Czerny, Siyu Yan, Karim A. Elmestekawy, Henry J. Snaith, Michael B. Johnston, Laura M. Herz   +7 more
wiley   +1 more source

The Intrinsic Relationship between Photoluminescence and Photocatalysis of MMoO₄/MWO₄ (M = Mg, Ca, Sr and Ba) Heterojunctions: Heterojunction Construction, Mechanism Insight and Development Tendency

Micromachines
The migration behavior of electron and hole pairs determines both photoluminescence and photocatalytic activity, which are two distinct properties of semiconductor materials.
Man Zhang, Jagadeesha Angadi Veerabhadrappa, Shoyebmohamad Fattemohamad Shaikh, Ashok Kumar   +3 more
doaj   +1 more source

Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers

New Journal of Physics, 2018
We study the time coherence of the photoluminescence radiated by spatially indirect excitons confined in a 10 μ m electrostatic trap. Above a critical temperature of about 1 K, we show that the photoluminescence is homogeneously broadened in the dilute ...
Romain Anankine, Suzanne Dang, Mussie Beian, Edmond Cambril, Carmen Gomez Carbonell, Aristide Lemaître, François Dubin   +6 more
doaj   +1 more source

Enhancement of ultrafast photoluminescence from deformed graphene studied by optical localization microscopy

New Journal of Physics, 2020
By using localization techniques, we demonstrated that the morphology of a 2D material in three dimensions can be optically obtained with nanometer precision in z -axis.
En-Xiang Chen, Hao-Yu Cheng, Zheng-Gang Chen, Wei-Liang Chen, Monika Kataria, Yu-Ming Chang, Yang-Fang Chen, Wei-Bin Su, Kung-Hsuan Lin   +8 more
doaj   +1 more source

Spectroscopic Signatures for the Dark Bose-Einstein Condensation of Spatially Indirect Excitons

, 2017
We study semiconductor excitons confined in an electrostatic trap of a GaAs bilayer heterostructure. We evidence that optically bright excitonic states are strongly depleted while cooling to sub-Kelvin temperatures.
Alloing, Mathieu, Anankine, Romain, Beian, Mussie, Cambril, Edmond, Carbonell, Carmen Gomez, Dubin, Francois, Lemaitre, Aristide   +6 more
core   +1 more source

Optical spectroscopy of single beryllium acceptors in GaAs/AlGaAs quantum well [PDF]

, 2016
We carry out microphotoluminescence measurements of an acceptor-bound exciton (A^0X) recombination in the applied magnetic field with a single impurity resolution.
Averkiev, N. S., Ivanov, S. V., Ivánov, Yu. L., Klimko, G. V., Koenraad, P. M., Kokurin, I. A., Petrov, P. V., Silov, A. Yu.   +7 more
core   +2 more sources