Results 51 to 60 of about 19,709 (232)
Higher-Order Multiphoton Absorption Upconversion Lasing Based on ZnO/ZnMgO Multiple Quantum Wells
Nanomaterials, 2022 In the progress of nonlinear optics, multiphoton absorption (MPA) upconversion lasing enables many vital applications in bioimaging, three-dimensional optical data storage, and photodynamic therapy.
Shushu Ma +5 more
doaj +1 more source
A 25 micron-thin microscope for imaging upconverting nanoparticles with NIR-I and NIR-II illumination. [PDF]
, 2019 Rationale: Intraoperative visualization in small surgical cavities and hard-to-access areas are essential requirements for modern, minimally invasive surgeries and demand significant miniaturization. However, current optical imagers require multiple hard-
Anwar, Mekhail +5 more
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Narrow-bandwidth solar upconversion: design principles, efficiency limits, and case studies
, 2012 We employ a detailed balance approach to model a single-junction solar cell with a realistic narrow-band, non-unity-quantum-yield upconverter. As upconverter bandwidths are increased from 0 to 0.5 eV, maximum cell efficiencies increase from the Shockley ...
Atre, Ashwin C. +2 more
core +1 more source
Quantifying Aflatoxin B1 in peanut oil using fabricating fluorescence probes based on upconversion nanoparticles. [PDF]
, 2016 Rare earth doped upconversion nanoparticles convert near-infrared excitation light into visible emission light. Compared to organic fluorophores and semiconducting nanoparticles, upconversion nanoparticles (UCNPs) offer high photochemical stability ...
Chen, Quansheng +3 more
core +1 more source
Advanced Materials, EarlyView.We report a multifunctional tapered optical fiber integrating a conformal micro‐resistance temperature detector (µRTD) for local, real‐time thermometry during optical stimulation. The platform combines light‐delivery and temperature sensing within a minimally invasive footprint, enabling detection of sub‐degree cortical heating under representative ...
Antonio Balena +6 more
wiley +1 more source
Angewandte Chemie, EarlyView.This minireview highlights recent advances in catalyst development and mechanistic strategies that enable photochemical and photocatalytic reactivity under 700–1000 nm NIR light, emphasizing how long‐wavelength excitation expands opportunities in both synthetic chemistry and biology.
Santosh K. Pagire +3 more
wiley +2 more sources
One-photon red light-triggered disassembly of small-molecule nanoparticles for drug delivery
Journal of Nanobiotechnology, 2021 Background Photoresponsive drug delivery can achieve spatiotemporal control of drug accumulation at desired sites. Long-wavelength light is preferable owing to its deep tissue penetration and low toxicity.
Kaiqi Long +7 more
doaj +1 more source
All‐Optical Reconfigurable Physical Unclonable Function for Sustainable Security
Advanced Materials, EarlyView.An all‐optical reconfigurable physical unclonable function (PUF) is demonstrated using plasmonic coupling–induced sintering of optically trapped gold nanoparticles, where Brownian motion serves as a robust entropy source. The resulting optical PUF exhibits high encoding density, strong resistance to modeling attacks, and practical authentication ...
Jang‐Kyun Kwak +4 more
wiley +1 more source
Nature Communications, 2022 Manipulating topological arrangement is a powerful tool for tuning the energy migration in molecular systems and inorganic materials. Here, authors synthesize NaErF4 and NaYbF4 upconversion nanoparticles with different architectures and demonstrate ...
Yanxin Zhang +7 more
doaj +1 more source
Ultralow-threshold, continuous-wave upconverting lasing from subwavelength plasmons. [PDF]
, 2019 Miniaturized lasers are an emerging platform for generating coherent light for quantum photonics, in vivo cellular imaging, solid-state lighting and fast three-dimensional sensing in smartphones1-3.
Barnard, Edward S +10 more
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