Results 91 to 100 of about 738,419 (256)

Photon-counting CT for forensic death investigations—a glance into the future of virtual autopsy

Frontiers in Radiology
This article explores the potential of photon-counting computed tomography (CT) in forensic medicine for a range of forensic applications. Photon-counting CT surpasses conventional CT in several key areas.
Dominic Gascho
doaj   +1 more source

Towards a Graphene-Based Low Intensity Photon Counting Photodetector

Sensors, 2016
Graphene is a highly promising material in the development of new photodetector technologies, in particular due its tunable optoelectronic properties, high mobilities and fast relaxation times coupled to its atomic thinness and other unique electrical ...
Jamie O. D. Williams, Jack A. Alexander-Webber, Jon S. Lapington, Mervyn Roy, Ian B. Hutchinson, Abhay A. Sagade, Marie-Blandine Martin, Philipp Braeuninger-Weimer, Andrea Cabrero-Vilatela, Ruizhi Wang, Andrea De Luca, Florin Udrea, Stephan Hofmann   +12 more
doaj   +1 more source

Charge‐Polarized Ni─S4 Single‐Atom Sites Drive Selective Photoreforming of Poly(lactic acid) to Lactate and Hydrogen

Advanced Functional Materials, EarlyView.
Atomically dispersed Ni–S4 sites on CdS nanorods induce interfacial charge polarization, directing photogenerated electrons to H2 evolution and holes to selective ester‐bond cleavage of poly(lactic acid). Without sacrificial reagents, this charge‐coupled system produces lactate while suppressing overoxidation, achieving an H2 evolution rate of 41.74 ...
Yu Yao, Panpan Zhang, Jinqiang Zhang, Xi‐lin Wu, Tara Pukala, Yifei Wang, Bernt Johannessen, Shaobin Wang, Xiaoguang Duan   +8 more
wiley   +1 more source

Photon-counting CT outperforms dental CBCT in detecting small accessory canals in root-filled teeth in a phantom study

Scientific Reports
Accurate visualization of dental structures in root-filled teeth is critical for endodontic assessment but challenging due to artifacts from root canal (RC) fillings.
Stephan Rau, Alexander Rau, Friederike Lang, Anna Fink, Jakob Weiß, Elias Kellner, Fabian Bamberg, Britta A. Jung, Rainer Schmelzeisen, Martin Pichotka, Markus Altenburger, Maximilian Frederik Russe, Wiebke Semper-Hogg   +12 more
doaj   +1 more source

Fractal superconducting nanowire single-photon detectors and their applications in polarimetric imaging

In this paper, we review the research and development of the fractal superconducting nanowire single-photon detectors (SNSPDs), including our demonstrations of high-performance devices and systems with over 80% system detection efficiency, negligibly low
Meng, Yun,, Feng, Yifan,, Zichi, Julien,, Hu, Xiaolong,, Gu, Chao,, Descamps, Thomas,, Xu, Liang,, Lan, Xiaojian,, Zou, Kai,, Hao, Zifan,, Zhu, Xiaotian,, Steinhauer, Stephan,, Zwiller, Val,, Iovan, Adrian,, Hu, Nan,, Chi, Xiaoming,, Cheng, Yuhao,, Gyger, Samuel,   +17 more
core   +1 more source

Hopping‐Mediated Zero‐Bias Photocharge Retention in Solution‐Processed Van Der Waals Heterostructures

Advanced Functional Materials, EarlyView.
Liquid–liquid interface assembly enables the fabrication of solution‐processed MoS2 and WSe2 centimeter‐scale, nanometer‐thick type‐II heterostructures on paper. Interfacial charge separation and hopping‐limited recombination produce rectification and persistent photocharge retention at zero bias.
Aniello Pelella, Andrea Sessa, Yi‐Chen Tsai, Xuzhao Liu, Abdul Mannan, George Greaves, Yahya Saboon, Ben Spencer, Antonio Di Bartolomeo, Cinzia Casiraghi, Jessica Boland, Alessandro Grillo   +11 more
wiley   +1 more source

Biodegradable 3D‐Printable and Coatable Antifouling Composites for Marine Applications

Advanced Functional Materials, EarlyView.
Marine biofouling damages submerged surfaces and raises greenhouse gas emissions. Biodegradable antifouling biocomposites were developed by hot‐mixing beeswax, Tween 80, and calcium stearate or stearic acid. Adjusting the component ratio enables processing via hot‐pressing, 3D‐printing, or dip‐coating.
Gabriele Corigliano, Lorenzo Ravelli, Martina Nardi, Ruowen Tu, Elena Bellini, Valerio Isa, Carlo Filippeschi, Roberta Finazzi, Luca Ceseracciu, Niloofar Paknezhad, Vincenzo Scribano, Paolo Galli, Silvia Lavorano, Simone Montano, Barbara Mazzolai, Marco Contardi, Pietro Cataldi, Athanassia Athanassiou   +17 more
wiley   +1 more source

High-efficiency Bragg grating enhanced on-chip photon-number-resolving detectors

The recent trend towards integration of quantum optics experiments has produced a demand for on-chip single photon detectors with high quantum efficiencies.
Mirin, R.P., Fox, A.E., Calkins, B., Gerrits, T., Humphreys, P.C., Walmsley, I.A., Gates, J.C., Lamas-Linares, A., Lita, A.E., Smith, P.G.R., Nam, S.W., Spring, J.B., Tomlin, N.A., Metcalf, B.J., Mennea, Paolo, Kolthammer, W.S.   +15 more
core   +1 more source

A New Strategy for Creating Quantum Light Emitters Via Post‐Growth Hydrogen‐Ion Irradiation of III‐V Nanowires

Advanced Functional Materials, EarlyView.
A post‐growth method is demonstrated to realize energy‐tunable quantum emitters in GaAs/GaAsN/GaAs core–multishell nanowires on a Si substrate. By combining the N‐induced bandgap reduction with H‐ion irradiation, the GaAsN potential landscape is engineered, enabling isolated, narrow emission lines that function as single‐photon sources with g(2)(0) ∼ 0.
Akant Sagar Sharma, Paolo De Vincenzi, Nadine Denis, Francesca Santangeli, Riccardo Pallucchi, Harikrishnan Gopalakrishnan, Elena Blundo, Antonio Polimeni, Marco Felici, Fumitaro Ishikawa, Marta De Luca   +10 more
wiley   +1 more source

Gate-Free InGaAs/InP Single-Photon Detector Working at Up to 100 Mcount/s

IEEE Photonics Journal, 2013
Recently, there has been considerable effort to develop photon-counting detectors for the near-infrared wavelength range, but the main limitation is to have a practical detector with both high count rates and low noise. Here, we show a novel technique to
Alberto Tosi, Carmelo Scarcella, Gianluca Boso, Fabio Acerbi   +3 more
doaj   +1 more source