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Photonics Research 2022年第4期10卷 1063-1070页

作者： Jin Chang johannes W.N.Los Ronan Gourgues Stephan Steinhauer S.N.Dorenbos Silvania F.Pereira HPaul Urbach Val Zwiller Iman Esmaeil Zadeh Optics Research Group ImPhys DepartmentFaculty of Applied SciencesDelft University of TechnologyDelft 2628 CJThe Netherlands Single Quantum B.V. Delft 2628 CJThe Netherlands KTH Royal Institute of Technology Department of Applied PhysicsAlbanova University Centre10691 StockholmSweden

Shortly after their inception, superconducting nanowire single-photon detectors(SNSPDs) became the leading quantum light detection technology. With the capability of detecting single-photons with near-unity efficiency,high time resolution, low dark count rate, and fast recovery time, SNSPDs outperform conventional single-photon detection techniques. However, detecting lower energy single photons(70% system detection efficiency(SDE) at 2 μm and sub-15 ps timing jitter. Furthermore, detectors from the same batch demonstrated unity internal detection efficiency at 3 μm and 80% internal efficiency at 4 μm, paving the road for an efficient mid-infrared single-photon detection technology with unparalleled time resolution and without mK cooling requirements. We also systematically studied the dark count rates(DCRs) of our detectors coupled to different types of mid-infrared optical fibers and blackbody radiation filters. This offers insight into the trade-off between bandwidth and DCRs for mid-infrared SNSPDs. To conclude, this paper significantly extends the working wavelength range for SNSPDs made from polycrystalline NbTiN to 1.5–4 μm, and we expect quantum optics experiments and applications in the mid-infrared range to benefit from this far-reaching technology.

关键词： nanowires technology SNSPD

The Effect of Nb Loading on Catalytic Properties of Ni/Ce_(0.75)Zr_(0.25)O_2 Catalyst for Methane Partial Oxidation

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Journal of Natural Gas Chemistry 2007年第3期16卷 227-234页

作者： Sitthiphong Pengpanich Vissanu Meeyoo Thirasak Rirksomboon johannes Schwank Department of Chemical Engineering Mahanakorn University of TechnologyBangkok 10530Thailand Center for Advanced Materials and Environmental Research Mahanakorn University of TechnologyBangkok 10530Thailand The Petroleum and Petrochemical College Chulalongkorn UniversityBangkok 10330Thailand Department of Chemical Engineering University of MichiganAnn ArborMI 481092136USA

In this study, the effect of Nb loading on the catalytic activity of Ce0.75Zr0.25O2-supported Ni catalysts was studied for methane partial oxidation. The catalysts were characterized by BET, H2 chemisorption, XRD, TPR, TEM and tested for methane partial oxidation to syngas in the temperature range of 400-800 ℃at atmospheric pressure. The results showed that the activity of methane partial oxidation on the catalysts was apparently dependent on Nb loading. It seemed that the addition of Nb lowered the catalytic activity for methane partial oxidation and increased the extent of carbon deposition. This might be due to the strong interaction between NiO and Nb-modified support and reduction of surface oxygen reducibility.

关键词： methane partial oxidation Ni/CeO2-ZrO2 niobium

Endo-microscopy beyond the Abbe and Nyquist limits

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Light(Science & Applications) 2020年第1期9卷 1246-1257页

作者： Lyubov V.Amitonova johannes F.de Boer LaserLaB Department of Physics and AstronomyVrije Universiteit AmsterdamDe Boelelaan 10811081 HV AmsterdamThe Netherlands Advanced Research Center for Nanolithography(ARCNL) Science Park 1061098 XG AmsterdamThe Netherlands

For several centuries,far-field optical microscopy has remained a key instrument in many scientific disciplines,including physical,chemical,and biomedical ***,far-field imaging has many limitations:the spatial resolution is controlled by the diffraction of light,and the imaging speed follows the Nyquist–Shannon sampling *** recent development of super-resolution techniques has pushed the limits of spatial ***,these methods typically require complicated setups and long acquisition times and are still not applicable to deeptissue ***,we report imaging through an ultra-thin fibre probe with a spatial resolution beyond the Abbe limit and a temporal resolution beyond the Nyquist limit simultaneously in a simple and compact *** use the random nature of mode coupling in a multimode fibre,the sparsity constraint and compressive sensing *** new approach of super-resolution endo-microscopy does not use any specific properties of the fluorescent label,such as depletion or stochastic activation of the molecular fluorescent state,and therefore can be used for label-free *** demonstrate a spatial resolution more than 2 times better than the diffraction limit and an imaging speed 20 times faster than the Nyquist *** proposed approach can significantly expand the realm of the application of nanoscopy for bioimaging.

关键词： beyond limit fibre

Actuation of Liquid Flow by Guided Acoustic Waves on Punched Steel Tapes with Protruding Loops

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Journal of Bionic Engineering 2021年第3期18卷 534-547页

作者： Alexander Backer johannes Landskron Klaus Stefan Drese Gerhard Lindner Institute of Sensor and Actuator Technology Coburg University of Applied Sciences and Arts96450 CoburgGermany

In a biomimetic approach the feasibility of liquid flow actuation by vibrating protruding structures excited via guided acoustic waves is *** by periodically beating cilia the loop part of a punched metallic hook-and-loop tape with tilted protruding loops was used as a waveguide for plate waves in *** waves were excited in the frequency range of 110 Hz to 220 Hz by directly coupling the tape to a loudspeaker membrane.A flow generated in the tilt direction of the loops with velocities up to 60 mm s 1 was visualized by ink droplets deposited on the *** phenomenon persisted,when the protruding length of the loops was reduced by decreasing the protrusion ***,after closing the punch holes near the loops with sticking tape streaming could not be observed any *** same happened with open punch holes when the ink was replaced by ***-frequency acoustic streaming around vibrating sharp edges is proposed as an explanation for the observed *** are expected with respect to the modification of flow profiles and the enhancement of transport processes along and across liquid-solid boundaries.

关键词： bio-inspired guided acoustic waves metallic hook-and-loop tape artificial cilia liquid propulsion Copyright

林牧系统的树木中豆科植物的比例减少并不影响其内部的氮吸收效率

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Journal of Plant Ecology 2023年第3期16卷 40-53页

作者： Andrea Schmiedgen Martin Komainda Manfred Kayser Bettina Tonn johannes Isselstein Grassland Science Department of Crop SciencesGeorg-August-University GöttingenD-37075 GöttingenGermany Centre of Biodiversity&Sustainable Land Use D-37077 GöttingenGermany Geo-Lab University of VechtaD-49377 VechtaGermany Department of Livestock Sciences FiBLCH-5070 FrickSwitzerland

在以豆科植物为主的草地中,豆科植物通过生物固氮为草地提供氮(N)。以往对林牧系统的研究发现,树木附近的豆科植物比例下降,将导致N供应以及树间草坪收获的牧草中N浓度的空间变化。在自然生态系统中,氮吸收效率(NRE)随着养分限制而增加... 详细信息

在以豆科植物为主的草地中,豆科植物通过生物固氮为草地提供氮(N)。以往对林牧系统的研究发现,树木附近的豆科植物比例下降,将导致N供应以及树间草坪收获的牧草中N浓度的空间变化。在自然生态系统中,氮吸收效率(NRE)随着养分限制而增加,所以在树木附近豆科植物比较稀缺。本研究验证了以下假设,即树木附近的NRE增加,补偿了豆科植物相对于牧草中N浓度的损失。为此,本研究分析了5年前建立的巷道种植系统中,分布在林木间的两种由豆科草本植物为主的植被组成。研究结果表明,豆科植物的比例向树线方向下降了45%,因此,活的和枯死的牧草中的N浓度也下降了,但平均仅下降了15%。由于N浓度降低以及靠近树木的牧草质量下降,N产量最多下降了50%。尽管树木附近的豆科植物减少,但无论植被组成如何,NRE都不受树线的影响。此外,与未管理的生态系统相比,收获之间的落叶间隔较短的林牧草地中管理草坪的内部N循环的相关性较低。豆科植物的比例控制着活的和枯死的草本植物的N浓度,而与林牧系统中的树木遮阴无关。

关键词：农林业氮循环草地管理豆科植物

Interband cascade technology for energy-efficient mid-infrared free-space communication

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Photonics Research 2023年第4期11卷 582-590页

作者： PIERRE DIDIER HEDWIG KNÖTIG OLIVIER SPITZ LAURENT CERUTTI ANNA LARDSCHNEIDER ELIE AWWAD DANIEL DIAZ-THOMAS ANBARANOV ROBERT WEIH johannes KOETH BENEDIKT SCHWARZ FRÉDÉRIC GRILLOT LTCI Télécom Paris Institut Polytechnique de ParisPalaiseau 91120France mirSense Centre d’intégration NanoInnovPalaiseau 91120France Institute for Solid State Electronics TU Wien1040 ViennaAustria Currently with CREOL College of Optics and PhotonicsUniversity of Central FloridaOrlandoFlorida 32816USA Institut d’Electronique et des Systèmes Universitéde MontpellierCNRS UMR 5214Montpellier 34000France Nanoplus Nanosystems and Technologies GmbH 97218 GerbrunnGermany Center for High Technology Materials University of New MexicoAlbuquerqueNew Mexico 87106USA

Space-to-ground high-speed transmission is of utmost importance for the development of a worldwide broadband ***-infrared wavelengths offer numerous advantages for building such a system,spanning from low atmospheric attenuation to eye-safe operation and resistance to inclement weather *** demonstrate a full interband cascade system for high-speed transmission around a wavelength of 4.18μ*** low-power consumption of both the laser and the detector in combination with a large modulation bandwidth and sufficient output power makes this technology ideal for a free-space optical communication *** proof-of-concept experiment employs a radio-frequency optimized Fabry–Perot interband cascade laser and an interband cascade infrared photodetector based on a type-II InAs/GaSb *** bandwidth of the system is evaluated to be around 1.5 *** allows us to achieve data rates of 12 Gbit/s with an on–off keying scheme and 14 Gbit/s with a 4-level pulse amplitude modulation *** quality of the transmission is enhanced by conventional pre-and post-processing in order to be compatible with standard error-code correction.

关键词： communication system free

Computational design of bimetallic core-shell nanoparticles for hot-carrier photocatalysis

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npj Computational Materials 2018年第1期4卷 389-395页

作者： Luigi Ranno Stefano Dal Forno johannes Lischner Department of Materials Imperial College LondonLondon SW72AZUK Department of Physics Imperial College LondonLondon SW72AZUK Department of Physics and Department of Materials and the Thomas Young Centre for Theory and Simulation of MaterialsImperial College LondonLondon SW72AZUK

Computational design can accelerate the discovery of new materials with tailored properties,but applying this approach to plasmonic nanoparticles with diameters larger than a few nanometers is challenging as atomistic first-principles calculations are not feasible for such *** this paper,we employ a recently developed material-specific approach that combines effective mass theory for electrons with a quasistatic description of the localized surface plasmon to identify promising bimetallic core-shell nanoparticles for hot-electron ***,we calculate hot-carrier generation rates of 100 different core-shell nanoparticles and find that systems with an alkali-metal core and a transition-metal shell exhibit high figures of merit for water splitting and are stable in aqueous *** analysis reveals that the high efficiency of these systems is related to their electronic structure,which features a two-dimensional electron gas in the *** calculations further demonstrate that hotcarrier properties are highly tunable and depend sensitively on core and shell *** design rules resulting from our work can guide experimental progress towards improved solar energy conversion devices.

关键词： applying alkali diameters

Genomic analysis of indigenous goats in Southwest Asia reveals evidence of ancient adaptive introgression related to desert climate

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Zoological Research 2023年第1期44卷 20-29页

作者： Hojjat Asadollahpour Nanaei Yudong Cai Akil Alshawi Jiayue Wen Tanveer Hussain Wei-Wei Fu Nai-Yi Xu Abdulameer Essa johannes ALenstra Xihong Wang Yu Jiang Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYanglingShaanxi 712100China Department of Internal and Preventive Medicine College of Veterinary MedicineUniversity of BaghdadIraqi Ministry of Higher Education and Scientific ResearchBagdad 10090Iraq Department of Molecular Biology Virtual University of PakistanLahore 54000Pakistan Animal Genetics Resources Department Directorate of Animal Resourcesthe Ministry of Iraqi AgricultureBaghdad 10081Iraq Faculty of Veterinary Medicine Utrecht University3508 TD UtrechtThe Netherlands

Understanding how evolutionary pressures related to climate change have shaped the current genetic background of domestic animals is a fundamental pursuit of biology. Here, we generated wholegenome sequencing data from native goat populations in Iraq and Pakistan. Combined with previously published data on modern, ancient(Late Neolithic to Medieval periods), and wild Capra species worldwide, we explored the genetic population structure, ancestry components, and signatures of natural positive selection in native goat populations in Southwest Asia(SWA). Results revealed that the genetic structure of SWA goats was deeply influenced by gene flow from the eastern Mediterranean during the Chalcolithic period, which may reflect adaptation to gradual warming and aridity in the region. Furthermore, comparative genomic analysis revealed adaptive introgression of the KITLG locus from the Nubian ibex(C. nubiana) into African and SWA goats. The frequency of the selected allele at this locus was significantly higher among goat populations located near northeastern Africa. These results provide new insights into the genetic composition and history of goat populations in the SWA region.

关键词： Goat Adaptation KITLG Southwest Asia Nubian ibex

The innate immune system in Parkinson's disease:a novel target promoting endogenous neuroregeneration

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Neural Regeneration Research 2015年第5期10卷 704-706页

作者： johannes CM Schlachetzki Jürgen Winkler Department of Molecular Neurology Friedrich-AlexanderUniversity (FAU) Erlangen-Nürnberg University Hospital Erlangen

Parkinson＇s disease （PD） is a slowly progressing neuro- degenerative disorder clinically defined by key symptoms like bradykinesia, rigidity, resting tremor, and postural instability. Reduction of dopaminergic terminals in the caudate nucleus and putamen, i.e., the striatum, accom- panied by decreased striatal levels of dopamine, and most likely consecutive degeneration of dopaminergic neurons in the substantia nigra pars compacta （SNpc） are tightly linked to the onset of the motor symptoms. With the etiology of PD largely not yet well defined, there is accu- mulating evidence for increased immune activation in PD. The majority of studies favor a detrimental effect of microglia, the resident innate immune cells of the brain, on PD pathogenesis. In the presence of alpha-synuclein, inflammatory responses elicited by microglia may be initiated by pattern recognition receptors, e.g.,

关键词： SVZ GFAP PD

Beneficial effects of hirudotherapy in a chronic case of complex regional pain syndrome

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Journal of Integrative Medicine 2019年第5期17卷 383-386页

作者： Rebecca Kulbida Alexander Mathes johannes Loeser Department of Anaesthesiology and Intensive Care Medicine University Clinic of Cologne

We report about hirudotherapy in a patient with chronic complex regional pain syndrome(CRPS) in the right hand. CRPS is a multifactorial disease associated with disabling pain as well as sensory and motor deficits. The optimal therapeutic management is based on personalized multimodal treatment approaches;however, hirudotherapy has not been described in the available literature. To date, we have completed five medicinal leech treatments. Altogether, hirudotherapy led to rapid and substantial relief of symptoms, especially with respect to pain intensity ratings and skin temperature asymmetries. In addition, the patient’s active and passive agility of the affected limb improved obviously.

关键词： Hirudotherapy Complex regional pain syndrome Chronic pain Medicinal leeches