Results 61 to 70 of about 174,035 (261)

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

Enhancing entangled two-photon absorption of Nile Red via temperature-controlled SPDC

APL Quantum
Entangled two-photon absorption can enable linear scaling of fluorescence emission with the excitation power. In comparison with classical two-photon absorption with quadratic scaling, this can allow fluorescence imaging or photolithography with a high ...
Aleksa Krstić, Tobias Bernd Gäbler, Nitish Jain, Patrick Then, Valerio Flavio Gili, Sina Saravi, Frank Setzpfandt, Christian Eggeling, Markus Gräfe   +8 more
doaj   +1 more source

DNA‐Templated 2D Heterostructures as Phototriggered Dynamic Nanohybrids: From Releasing Molecular Loads to Controlling Enzyme Biocatalytic Function

Advanced Functional Materials, EarlyView.
DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen, Haosen Miao, Weiying Hong, Matteo Palma   +3 more
wiley   +1 more source

Photon Pair Source based on PPLN‐Waveguides for Entangled Two‐Photon Absorption

Advanced Physics Research
Fluorescence excitation by absorption of entangled photon pairs offers benefits compared to classical imaging techniques, such as the attainment of higher signal levels at low excitation power while simultaneously mitigating phototoxicity.
Tobias Bernd Gäbler, Patrick Hendra, Nitish Jain, Markus Gräfe   +3 more
doaj   +1 more source

Exploring Curvature Effects in Direct‐Written 3D Curved Hollow Magnetic Nanoshells

Advanced Functional Materials, EarlyView.
Fabricated by a hybrid FEBID/CVD method, 3D PtC/Co3Fe core–shell heterostructures with engineered curvature and shell thickness exhibit complex reversal modes with axially symmetric N'eel‐type domain walls. XMCD‐PEEM combined with full‐scale micromagnetic simulations reveal how curvature and thickness govern the domain wall energy landscape and shape ...
Oleksii M. Volkov, Fabrizio Porrati, Florian Kronast, Riccardo Hertel, Pavlo Makushko, Olha Bezsmertna, Alexander Kuprava, Mohamad‐Assaad Mawass, Sven Barth, Michael Huth, Denys Makarov   +10 more
wiley   +1 more source

New Fluorescent Porphyrins with High Two-Photon Absorption Cross-Sections Designed for Oxygen-Sensitization: Impact of Changing the Connectors in the Peripheral Arms

Photochem, 2023
In the continuation of our sustained interest in porphyrin-based dendrimers and their use as luminescent photosensitizers for two-photon photodynamic therapy (2P-PDT), we wondered about the effect of changing the connectors in our macromolecular ...
Limiao Shi, Zhipeng Sun, Nicolas Richy, Olivier Mongin, Mireille Blanchard-Desce, Frédéric Paul, Christine O. Paul-Roth   +6 more
doaj   +1 more source

Two-Photon Absorption and Two-Photon-Induced Gain in Perovskite Quantum Dots

, 2018
Perovskite quantum dots (PQDs) emerged as a promising class of material for applications in lighting devices, including light emitting diodes and lasers. In this work, we explore nonlinear absorption properties of PQDs showing the spectral signatures and
Ana F. Nogueira (1480996), Andrew A. R. Watt (1627966), Lazaro A. Padilha (1272237), Zhanet Zaharieva (5375570), Jaqueline O. Rocha (5375573), Luiz G. Bonato (3104088), Carlos H. de Brito Cruz (5375576), Gabriel Nagamine (3104085)   +7 more
core   +1 more source

Cooperative two-photon absorption [PDF]

The Journal of Chemical Physics, 1983
It is well known that irradiation with intense laser light can lead to nonlinear absorption processes by individual molecules. However, the mutual interaction between two molecules can lead to cooperative nonlinear processes which result in entirely new features in the absorption spectrum.
Andrews, David L., Harlow, M. J.
openaire   +2 more sources

Strain‐Programmable Luminescent Adhesive Patch With Tartrazine‐Mediated Optical Skin Clearing for Photochemical Tissue Bonding

Advanced Functional Materials, EarlyView.
We propose a suture‐complementary approach that integrates optical skin clearing with a strain‐programmable luminescent adhesive patch. Hyaluronic acid promotes transdermal delivery of tartrazine to improve optical clearing and stabilizes its interaction with a photosensitizer. Optical clearing increases the penetration depth of visible light into skin,
Seong‐Jong Kim, Kyungjoo Jo, Kwanghyeon Park, Jun Hee Kim, Jong Hyeong Cho, Inhoo Choi, Sei Kwang Hahn   +6 more
wiley   +1 more source

Non-Degenerate Two-Photon Absorption of Fluorescent Protein Chromophores

, 2023
Two-photon absorption (2PA), where a pair of photons are absorbed simultaneously, is recognized as a potent bioimaging technique, which depends on the quantified 2PA probability, defined as cross-section (σ2PA).
Ismael A., Elayan, Alex, Brown
core   +1 more source