Results 71 to 80 of about 167,325,945 (199)

Jewelled Byzantine and Medieval Reliquaries of the True Cross: Peridots and Other Gemstones in Material and Symbolic Perspective

Journal of Raman Spectroscopy, EarlyView.
An interdisciplinary in situ study of jewelled reliquaries of the True Cross integrates gemmology and portable analytical techniques, revealing new evidence on the identification and symbolic role of peridots and other gemstones. ABSTRACT Jewelled crosses containing relics of the True Cross occupy a central position in the devotional, artistic and ...
Stefania Martiniello, Stefano Legnaioli, Simona Raneri   +2 more
wiley   +1 more source

Time-resolved luminescence of low sensitivity quartz from crystalline rocks [PDF]

, 2007
preprintTime-resolved luminescence spectra of low sensitivity natural quartz from crystalline rocks are presented. The luminescence was pulse-stimulated at width using 470 nm blue light from quartz separated from plutonic, metamorphic, volcanic and ...
Ramseyer, Karl, Preusser, F, Ramseyer, K, Ogundare, F O, Chithambo, Makaiko L, Preusser, Frank, Ogundare, F.O., Chithambo, M.L.   +7 more
core   +1 more source

Design and optoelectronic profiling of a semicrystalline thiophene–phenylene copolymer for advanced organic electronics

Polymer International, EarlyView.
A new semicrystalline copolymer, PTBT‐3OBu, was synthesized. Intramolecular S···O conformational locks induce high backbone planarity, promoting strong interchain coupling and molecular ordering in thin films, seen in an optical red shift. This synergy between planarity and semicrystalline morphology is promising for photovoltaic and electrochromic ...
Sandra Lúcia Nogueira, Silésia de Fátima Curcino da Silva, Giovani Bortolini Oliveira, Bruno Souza Zanatta, Thibaut Jarrosson, Françoise Serein‐Spirau, Alexandre Marletta, Raigna Augusta da Silva   +7 more
wiley   +1 more source

Photovoltaic Effect in a III‐IV‐V Compound Semiconductor

Progress in Photovoltaics: Research and Applications, EarlyView.
A large reduction of the GaAs band gap is obtained with incorporation of 6.5% Ge during epitaxy without introducing extended defects or composition inhomogeneity. Heterojunction solar cell devices were fabricated with 0.76‐V open circuit voltage and an internal quantum efficiency above 40% at energies below the bandgap of the GaAs emitter.
José M. Ripalda, Pablo Caño, Micaela Rodriguez‐Peña, Miguel Angel Sevillano‐Bendezú, Aurelia Trevisan, Raghavendra Juluri, Aitana Cano, Iván García, Alicia Gonzalo, Enrique Navarro, Jeronimo Buencuerpo, Paul Koenraad, Ana María Sanchez, Yolanda Gonzalez   +13 more
wiley   +1 more source

Construction optimization and functional applications of fluorescent nanodiamonds

Responsive Materials, EarlyView.
This review summarizes synthesis, surface modification and optical properties of fluorescent nanodiamonds. Their advances in quantum sensing, single‐photon emission and biomedicine are discussed, and existing challenges and future directions are presented.
Yunpeng Yang, Sen Zhang, Chao Chen, Wensi Yang, Zuanquan Chen, Rui Fan, Linlin Liu, Benjian Liu, Kang Liu, Zhibo Zhang, Bing Dai, Jiaqi Zhu   +11 more
wiley   +1 more source

Photo‐Switched Catalytic Amyloids

Small, EarlyView.
Photo‐switched reversible hierarchical assembly of catalytic amyloid fibrils is accomplished by mixing an amphiphilic cross‐ß peptide with a merocyanine photo switch. The peptide monomers, comprising phenylalanine‐lysine repeats, do not self‐assemble in water because of the electrostatic repulsion.
Shubhra Kanti Bhaumik, Sisira Mambram Kunnath, Elad Arad, Einat Nativ‐Roth, Arunavo Chatterjee, Albert Batushansky, Nitzan Shauloff, Hanna Rapaport, Raz Jelinek   +8 more
wiley   +1 more source

Anomalous Sub‐Band Gap Emission at Room Temperature in Mixed‐Dimensional WS2/Cu2O Heterostructures

Small, EarlyView.
Monolayer WS2 on Cu2O produces a room‐temperature sub‐bandgap emission from the hybrid interface. Spectroscopy and electrical bias measurements indicate that this emission arises primarily from WS2‐modified Cu2O defect states rather than interlayer excitons.
Osamah Kharsah, Jonah von Kuczkowski, Ahmed Shahin, Rouaa Albalkhi, Aya Al‐Amwi, Ibrahim Titi, Yossarian Liebsch, Oliver Altenhoff, Ulrich Hagemann, Anke Hierzenberger, Kevin Musselman, Marika Schleberger   +11 more
wiley   +1 more source

Laser‐Synthesized Carbon‐Coated Elemental Bismuth Nanoparticles for Sustained Reactive Oxygen Species Generation Under Visible‐Light Irradiation

Small, EarlyView.
Femtosecond laser ablation of bismuth in acetone yields carbon‐coated nanoparticles with a metallic Bi0 core and an amorphous carbon shell. The core‐shell architecture preserves visible‐light‐driven redox activity and enables sustained hydroxyl‐radical generation.
Pavel Bezrukov, Sravan Sangeeth Surendran, Andrey Machnev, Andrei Pastukhov, Alexander Gumennik, Andrei Kabashin, Pavel Ginzburg   +6 more
wiley   +1 more source

Safeguarding the Photoluminescence of Silver Sulfide Nanocrystals in Biological Environments via Silica Shielding

Small, EarlyView.
Interactions with biomolecules can alter the photoluminescence of Ag2S nanocrystals, undermining near‐infrared imaging and thermometry. Incorporation into dendritic silica minimizes these interactions and preserves emission intensity, spectral response, and lifetime in plasma and whole blood. This shielding enables more reliable imaging and temperature
Alejandro Hernández Medel, Marina París Ogáyar, Livia Didonè, Peijiang Wang, Ramón Manzorro, Ana B. Hungría, Miriam Granado, Beatriz H. Juárez, Daniel Jaque, Emma Martín Rodríguez, Riccardo Marin, Célia T. Sousa   +11 more
wiley   +1 more source

Stimulated luminescence properties of natural alexandrite in response to X-ray irradiation

This paper reports for the first time the in-depth study of thermoluminescence (TL) and optically stimulated luminescence (OSL) of Brazilian alexandrite pellets (BeAl2O4: Cr3+) previously exposed to X-rays. Firstly, structural and composition analysis of
Yoshimura, E. M., Trindade, N. M., Ulsen, C., Silva, A. O., Nunes, M. C.S. [UNESP], Amorim, Y. F.   +5 more
core   +1 more source