Results 51 to 60 of about 494,691 (265)

Identification of lead vacancy defects in lead halide perovskites

Nature Communications, 2021
Point defects compromise the electronic performance of hybrid perovskites, yet no experimental identifications have been reported. Here, the authors, for the first time, identify lead monovacancy defect in MAPbI3 using positron annihilation lifetime ...
David J. Keeble, Julia Wiktor, Sandeep K. Pathak, Laurie J. Phillips, Marcel Dickmann, Ken Durose, Henry J. Snaith, Werner Egger   +7 more
doaj   +1 more source

Mitochondria and Neuromast Tagging With Fluorescent Gallium‐Triapine Analogues: In Cellulo MP FLIM and Zebrafish Live Imaging

Advanced Science, EarlyView.
Fluorescent BODIPY‐conjugated thiosemicarbazone ligands and their Ga(III), In(III), and Fe(III) complexes, inspired by Triapine, are developed as theranostic agents. Multiphoton FLIM and confocal microscopy in cancer cells and zebrafish reveal real‐time uptake, mitochondrial localisation, and whilst spectroscopic assays indicated preserved complex ...
Megan J. Green, Michael W. Jones, Merissa Saleem, Haobo Ge, Melita Tvardauskaite, Julia Dudzic, Fernando Cortezon‐Tamarit, Rory L. Arrowsmith, Charareh Pourzand, Gabriele Kociock‐Kohn, Nicholas H. Rees, Jonathan R. Dilworth, Stephen Faulkner, Stanley W. Botchway, David Gurevich, Sofia I. Pascu   +15 more
wiley   +1 more source

Changes of electron density and defects distribution in binary and ternary iron alloys studied by positron annihilation [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy, 2017
Properties of binary and ternary iron based alloys doped by different additions were investigated. It was shown for binary alloys containing chromium, molybdenum and tungsten were that results of doping by 0.8% molybdenum and tungsten are ...
Udovsky A., Grafutin V., Kolotushkin V., Miloserdin V., Evstukhina I., Mischenko A., Ermakov V., Samosadny V., Funtikov Y.   +8 more
doaj   +1 more source

Positron annihilation lifetime spectroscopy study of Kapton thin foils [PDF]

, 2016
Variable Energy Positron Annihilation Lifetime Spectroscopy (VE-PALS) experiments on polyimide material Kapton are reported. Thin Kapton foils are widely used in a variety of mechanical, electronic applications. PALS provides a sensitive probe of vacancy-
Lowe, B., Kanda, G. S., Keeble, D. J., Egger, W., Ravelli, L.   +4 more
core   +1 more source

Smart Nanotechnologies for Multimodal Neuromodulation and Brain Interfacing

Advanced Science, EarlyView.
Recent advances in smart nanotechnologies are expanding the toolbox for brain interfacing, from wireless neuromodulation and high‐resolution sensing to targeted delivery within the central nervous system. By combining responsive nanomaterials with bioinspired design, these platforms enable multimodal interactions with neurons and glia, while also ...
Tommaso Curiale, Marie Celine Lefevre, Alessio Carmignani, Maria Cristina Ceccarelli, Matteo Battaglini, Attilio Marino, Gianni Ciofani   +6 more
wiley   +1 more source

Pre-martensitic phenomena of thermoelastic martensitic transformation of NiTiCu alloys studied with positron annihilation lifetime spectroscopy

Science and Technology of Advanced Materials, 2004
Many anomalous phenomena have been observed in NiTi alloys above martensite start temperature, such as softening of the shear constants, increase of internal friction and diffuse scattering of TEM.
J. Katsuyama, H. Araki, M. Mizuno and Y. Shirai
doaj  

Enhanced positronium lifetime imaging through two-component reconstruction in time-of-flight positron emission tomography

Frontiers in Physics
Positronium lifetime imaging (PLI) is a newly demonstrated technique possible with time-of-flight (TOF) positron emission tomography (PET), capable of producing an image reflecting the lifetime of the positron, more precisely ortho-positronium (o-Ps ...
Zhuo Chen, Chien-Min Kao, Hsiun-Hsiung Huang, Lingling An, Lingling An   +4 more
doaj   +1 more source

Positron Lifetime Measurements of Vacancy Defects in Complex Oxides [PDF]

, 2014
Native defects in complex oxides play a crucial role in determining their optical, electrical, and magnetic properties and it is difficult to identify and characterize them. Positron lifetime spectroscopy is a powerful technique to study vacancy defects;
Selim, F., Varney, C.
core   +1 more source

Structural and Compositional Effects on the Scintillation Properties of Fast Emitting Metal‐Organic Frameworks

Advanced Science, EarlyView.
The crystalline structure, the atomic numbers of the constituent elementsand the size of MOF crystals each influence their photoluminescence and scintillation properties in distinct ways. Together, these factors provide valuable guidelines for designing systems with optimized performance and tunable timing characteristics, arising from the synergistic ...
Francesca Cova, Jacopo Perego, Biplab Joarder, Nobuhiro Yanai, Anna Vedda, Silvia Bracco, Angiolina Comotti, Angelo Monguzzi, Irene Villa   +8 more
wiley   +1 more source

A single shot gamma-induced positron spectroscopy based on laser wakefield accelerator

AIP Advances, 2021
Single shot gamma-induced positron annihilation spectroscopy (GiPS) based on a laser wakefield accelerator is proposed. In this spectroscopy, a large number of gamma rays generated by laser-wakefield accelerated electrons are injected into a sample in a ...
Yonghong Yan, Minghai Yu, Shaoyi Wang, Fang Tan, Yue Yang, Xiaohui Zhang, Yuchi Wu, Jingqin Su, Weimin Zhou, Yuqiu Gu   +9 more
doaj   +1 more source