Results 101 to 110 of about 1,191,294 (396)

Effects of strand and directional asymmetry on base-base coupling and charge transfer in double-helical DNA [PDF]

, 2002
Mechanistic models of charge transfer (CT) in macromolecules often focus on CT energetics and distance as the chief parameters governing CT rates and efficiencies.
Barton, Jacqueline K., O'Neill, Melanie A.   +1 more
core  

Few photon transport in a waveguide coupled to a pair of collocated two-level atoms

, 2011
We calculate the one- and two-photon scattering matrices of a pair of collocated non-identical two-level atoms coupled to a waveguide. We show that by proper choice of a two-photon input, the background fluorescence by the atoms may be completely ...
Eden Rephaeli, L. Mandel, Shanhui Fan, Şükrü Ekin Kocabaş   +3 more
core   +1 more source

Copper Doping Enhances the Activity and Selectivity of Atomically Precise Ag44 Nanoclusters for Photocatalytic CO2 Reduction

Advanced Functional Materials, EarlyView.
By a simple anti‐Galvanic reaction, up to six copper atoms could be preferably doped into the Ag2(SR)5 staple motifs and Ag20 dodecahedral shell of an atomically precise Ag44(SR)30 nanocluster. When anatase TiO2 is used as substrate, the (AgCu)44/TiO2 photocatalyst exhibited much improved activity in photocatalytic CO2 reduction compared to Ag44/TiO2 ...
Ye Liu, Xi Zheng, Xiufan Liu, Tengyuan Gao, Nicola Pinna, Yu Wang   +5 more
wiley   +1 more source

Controlled Aggregation of Pyrene‐Based Supramolecular Nanostructures for Light‐Driven Switchable H2 or H2O2 Production

Advanced Functional Materials, EarlyView.
This work reports the self‐assembly of a pyrene derivative into two distinct nanostructures and their application in visible‐light photocatalysis. The two nanostructures exhibit completely different yet complementary photocatalytic activities, promoting either H2 or H2O2 evolution.
Marianna Barbieri, Matilde Doardo, Ilaria Fortunati, Anna Fortunato, Elisabetta Collini, Francesca Arcudi, Luka Ðorđević   +6 more
wiley   +1 more source

Probing Plasmons in Graphene by Resonance Energy Transfer

, 2011
We propose a novel method to probe electronic excitations in graphene by monitoring the fluorescence quenching of a semiconductor quantum dot (or a dye molecule) due to the resonance energy transfer to the graphene sheet.
Efimov, Anatoly, Velizhanin, Kirill A.
core   +1 more source

Fluorescence Enhancement and Quenching in Tip-Enhanced Fluorescence Spectroscopy

Frontiers in Optics / Laser Science, 2018
We study fluorescence enhancement for a dipole emitter placed between a tip and different dielectric substrates. Resonant behavior is observed as a function of tip-substrate distance for a silver tip placed above a glass substrate and displays a strong dependence on the radius of the curvature of the tip.
Justin R. Isaac, Huizhong Xu
openaire   +1 more source

Copper-Induced Fluorescence Quenching in a Bis[2-(2′-hydroxyphenyl)benzoxazole]pyridinium Derivative for Quantification of Cu2+ in Solution [PDF]

, 2022
Buddhima U. Rajapakshe, Yonghao Li, Brian Corbin, Kaveesha J. Wijesinghe, Yi Pang, Chathura S. Abeywickrama   +5 more
openalex   +1 more source

Spectroscopic properties of a two-level atom interacting with a complex spherical nanoshell

, 2004
Frequency shifts, radiative decay rates, the Ohmic loss contribution to the nonradiative decay rates, fluorescence yields, and photobleaching of a two-level atom radiating anywhere inside or outside a complex spherical nanoshell, i.e. a stratified sphere
Abramowitch, Agarwal, Alexander Moroz, Bisht, Bouhelier, Campillo, Chance, Chew, Chew, Chew, de Dood, de Dood, Drexhage, Dulkeith, Dung, Dung, Enderlein, Fuchs, Fujiwara, Graf, Hardikar, Imhof, Ipe, Jackson, Jackson, Kleppner, Klimov, Klimov, Klimov, Klimov, Kreibig, Lakowicz, Lavallard, Leung, Li, Liz-Marzán, Mackowski, Mayall, Melnyk, Mooradian, Moroz, Moroz, Mullaney, Neeves, Nienhuis, Oldenburg, Oldenburg, Prodan, Purcell, Rikken, Ruppin, Ruppin, Schniepp, Schuurmans, Snoeks, Sullivan, Tip, Tomaš, Ung, Urbach, van Blaaderen, Velikov, Wylie, Yataganas   +63 more
core   +1 more source

Ladder‐Type Benzene‐Perylene Dyes with Efficient Laser Properties in the Near‐IR by Detracting/Activating Low/High Frequency Vibronic Modes

Advanced Functional Materials, EarlyView.
The NNR‐n series of oligomeric nanographenes delivers exceptional emission performance. This work shows that this performance is originated by their ladder‐type structure, which effectively deactivates low‐frequency vibronic modes. This deactivation neglects the main pathway for non‐emissive deactivation, even in the near‐infrared region. The potential
Marcos Díaz‐Fernández, Álex Farrando Pérez, Fernando Gordillo Gámez, Pedro G. Boj, José M. Villalvilla, José A. Quintana, Yanpei Wan, Daniel Aranda, José Manuel Marín‐Beloqui, Jishan Wu, Zebing Zeng, María A. Díaz‐García, Juan Casado   +12 more
wiley   +1 more source

Sensing of iron(III)-biomolecules by surfactant-free fluorescent copper nanoclusters

Sensing and Bio-Sensing Research, 2019
Surfactant-free copper nanoclusters (sf-CuNCs) synthesized in the absence of external stabilizer, could be promising fluorescence biosensors because of the presence of relatively exposed surfaces that may ease coupling with biomolecules.
Dillip Kumar Sahu, Debabrata Singha, Kalyanasis Sahu   +2 more
doaj   +1 more source