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Multifunctional snO_(2) QDs/MXene Heterostructures as Laminar Interlayers for Improved Polysulfide Conversion and Lithium Plating Behavior

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nano-Micro Letters 2024年第11期16卷 156-169页

作者： shungui Deng Weiwei sun Jiawei Tang Mohammad Jafarpour frank nüesch jakob Heier Chuanfang Zhang College of Materials science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China Laboratory for functional Polymers Swiss Federal Laboratories for Materials Science and Technology(EMPA)Überlandstrasse 1298600 DübendorfSwitzerland Institute of Materials science and Engineering Ecole Polytechnique Fédérale de Lausanne(EPFL)Station 121015 LausanneSwitzerland Key Laboratory of Quantum Materials and Devices of Ministry of Education School of PhysicsSoutheast UniversityNanjing 211189People’s Republic of China sEU‑fEI nano‑Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096People’s Republic of China

Poor cycling stability in lithium–sulfur(Li–s)batteries necessitates advanced electrode/electrolyte design and innovative interlayer *** catalysis has emerged as a promising approach,leveraging the adsorption and catalytic performance on lithium polysulfides(LiPss)to inhibit LiPss shuttling and improve redox *** this study,we report an ultrathin and laminar snO_(2)@MXene heterostructure interlayer(snO_(2)@MX),where snO_(2) quantum dots(QDs)are uniformly distributed across the MXene *** combined structure of snO_(2) QDs and MXene,along with the creation of numerous active boundary sites with coordination electron environments,plays a critical role in manipulating the catalytic kinetics of sulfur *** Li–s cell with the snO_(2)@MX-modified separator not only demonstrates superior electrochemical performance compared to cells with a bare separator but also induces homogeneous Li deposition during *** a result,an areal capacity of 7.6 mAh cm^(-2) under a sulfur loading of 7.5 mg cm^(-2) and a high stability over 500 cycles are *** work demonstrates a feasible strategy of utilizing a laminar separator interlayer for advanced Li–s batteries awaiting commercialization and may shed light on the understanding of heterostructure catalysis with enhanced reaction kinetics.

关键词： Lithium-sulfur battery Heterogeneous catalysis Heterostructure Redox kinetics Lithium dendrites

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Dielectric and physico-chemical behavior of single thermally thick wood blocks under microwave assisted pyrolysis

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Particuology 2024年第3期86卷 291-303页

作者： nicole Vorhauer-Huget jakob seidenbecher supriya Bhaskaran francesca schenkel Lucas Briest suresh Gopalkrishna Jan Barowski Andrea Dernbecher Liane Hilfert Ilona Rolfes Alba Dieguez-Alonso Otto von Guericke University Magdeburg Universitatsplatz 239106MagdeburgGermany Ruhr University Bochum Institute of Microwave SystemsUniversitatsstraβe 15044801BochumGermany

Pyrolysis of thermally thick beech wood blocks with a size of around 2.5×8×6 cm^(3)(width×length×height)was carried out in a lab scale microwave reactor with a frequency of 2.45 GHz,operated,both,at 300 W and 600 W under inert conditions,using n_(2) at around 400 mbar absolute *** microwave cavity had a size of 20×20×20 cm^(3).The specific energy supply referred to the untreated wood block was 4-8 W/g,with slight variations depending on the initial water *** mass loss and the reflected microwave power were in-situ monitored during the *** sample surface and chamber temperatures were measured with a pyrometer and a thermocouple,***-chemical and dielectric properties of the produced solids were investigated and compared to those of chars produced under conventional pyrolysis using the same raw *** is shown that the complex dielectric permittivity of the solid products changed drastically during the pyrolysis process,with increasing heating properties as the conversion process *** was easily achieved using 60o W without ***,300 W was not enough to achieve a high conversion degree,independently of the irradiation ***,together with the physico-chemical analyses of the solids,hinted to the importance of the transport kinetics in thermally thick materials,although further investigationis still required.

关键词： Microwave assistedpyrolysis Conventional pyrolysis Dielectric measurements Penetration depth Elemental analysis

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Ca^(2+) binding to the C_(2)E domain of otoferlin is required for hair cell exocytosis and hearing

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Protein & Cell 2024年第4期15卷 305-312页

作者： Han Chen Mehar Monga Qinghua fang Loujin slitin jakob neef shashank s.Chepurwar Regina Célia Mingroni netto Karina Lezirovitz Alfredo Tabith,Jr. fritz Benseler nils Brose Kathrin Kusch Carolin Wichmann nicola strenzke Barbara Vona Julia Preobraschenski Tobias Moser Institute for Auditory neuroscience and InnerEarLab University Medical Center Göttingen37075 GöttingenGermany Collaborative Research Center 889 University of Göttingen37075 GöttingenGermany Auditory neuroscience and synaptic nanophysiology Group Max Planck Institute for Multidisciplinary Sciences37075 GöttingenGermany Göttingen Graduate Center for neurosciences Biophysics and Molecular BiosciencesUniversity of Göttingen37075 GöttingenGermany Biochemistry of Membrane Dynamics Group Institute for Auditory NeuroscienceUniversity Medical Center Göttingen37075 GöttingenGermany Molecular Architecture of synapses Group Institute for Auditory Neuroscience and InnerEarLabUniversity Medical Center Göttingen37075 GöttingenGermany Center for Biostructural Imaging of neurodegeneration University Medical Center Göttingen37075 GöttingenGermany Auditory systems Physiology Group Institute for Auditory Neuroscience and InnerEarLabUniversity Medical Center Göttingen37075 GöttingenGermany Departamento de Genética e Biologia Evolutiva Centro de Pesquisas sobre o Genoma Humano e Células-TroncoInstituto de BiociênciasUniversidade de São PauloSão Paulo 05508-220Brazil Laboratório de Otorrinolaringologia/LIM32 Faculdade de MedicinaHospital das ClínicasUniversidade de São PauloSão PauloSP 05508-220Brazil DERDIC Pontifícia Universidade Católica de São PauloSão Paulo 05508-220Brazil Department of Molecular neurobiology Max Planck Institute for Multidisciplinary Sciences37075 GöttingenGermany Multiscale Bioimaging Cluster of Excellence(MBExC) University of Göttingen37075 GöttingenGermany functional Auditory Genomics Group Auditory Neuroscience and Optogenetics LaboratoryGerman Primate Center37077 GöttingenGermany Hearing Genomics Group Institute for Auditory Neuroscience and InnerEarLabUniversity Medical Center Göttingen37075 GöttingenGermany Institute of Human Genetics University Medical Center Göttingen37075 GöttingenGermany

Dear Editor,Afferent synapses of cochlear inner hair cells(IHCs)employ a unique molecular machinery(see extended background in supplementary Materials).Otoferlin is a key player in this machinery and its defects cause human auditory synaptopathy(Moser and starr,2016).Otoferlin,a tail-anchored(Vogl et al.,2016)multi-C_(2)-domain protein(fig.1Ai)specific to hair cells(Roux et al.,2006),is a member of the ferlin protein family involved in membrane trafficking and repair that are of major disease relevance(Pangršičet al.,2012),also see supplementary *** is distributed broadly within IHCs(fig.2Ai-Aiii;Pangrsic et al.,2010;Roux et al.,2006).

关键词： auditory hair

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soft monolithic infrared neural interface for simultaneous neurostimulation and electrophysiology

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Light(science & Applications) 2023年第6期12卷 1103-1116页

作者： Marcello Meneghetti Jaspreet Kaur Kunyang sui jakob f.s.rens.n Rune W.Berg Christos Markos DTU Electro Department of Electrical and Photonics EngineeringTechnical University of DenmarkDK-2800 KgsLyngbyDenmark Department of neuroscience University of CopenhagenBlegdamsvej 3BDK-2200 Kbh NCopenhagenDenmark nORBLIs Aps Virumgade 35DDK-2830 VirumDenmark

Controlling neuronal activity using implantable neural interfaces constitutes an important tool to understand and develop novel strategies against brain *** neurostimulation is a promising alternative to optogenetics for controlling the neuronal circuitry with high spatial ***,bi-directional interfaces capable of simultaneously delivering infrared light and recording electrical signals from the brain with minimal inflammation have not yet been ***,we have developed a soft fibre-based device using high-performance polymers which are>100-fold softer than conventional silica glass used in standard optical *** developed implant is capable of stimulating the brain activity in localized cortical domains by delivering laser pulses in the 2μm spectral region while recording electrophysiological *** and local field potentials were recorded in vivo from the motor cortex and hippocampus in acute and chronic settings,*** analysis of the brain tissue indicated insignificant inflammatory response to the infrared pulses while the signal-to-noise ratio of recordings still remained *** neural interface constitutes a step forward in expanding infrared neurostimulation as a versatile approach for fundamental research and clinically translatable therapies.

关键词： neural stimulation recording

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Association of rare sPInK1 gene mutation with another base substitution in chronic pancreatitis patients

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World Journal of Gastroenterology 2006年第33期12卷 5352-5356页

作者： Viacheslav n Kalinin Jussuf T Kaifi Heidi schwarzenbach Anatoly s sergeyev Bjoern C Link Dean Bogoevski Yogesh Vashist jakob R Izbicki Emre f Yekebas Department of General Visceral and Thoracic Surgery University Medical Center Hamburg-Eppendorf Hamburg Germany Institute for Tumor Biology University Medical Center Hamburg-Eppendorf Hamburg Germany Research Centre for Medical Genetics Moscow Russia

AIM: To verify and expand the known spectrum of serine protease inhibitor Kazal type 1 (sPInK1) gene mutations in chronic pancreatitis. METHODs: DnA extracted from 172 chronic pancreatitis patients was assayed for sPInK1 gene mutations by PCR and DnA sequencing. A control cohort of 90 unrelated healthy individuals was analysed by the same methods for presence of common populational polymorphisms, and frequency of five-loci haplotypes was calculated. Linkages of gene aberrations in single sPInK1 gene copies were analysed by long-distance PCR followed by allele-specifi c PCR and DnA sequencing. REsULTs: The most frequent sPInK1 gene mutation n34s was found at a frequency of 6%. furthermore, we detected the heterozygous intervening sequence (IVs) 3 + 2 T > C mutated gene in 2 German patients and 1 Macedonian chronic pancreatitis patient. In all three sPInK1 gene copies an additional rare base substitution was found: 5’untranslated region (UTR)-215 G > A. Poly-morphism analysis revealed that all three affected genes carried the same fi ve-loci haplotype. DnA sequencing of another chronic pancreatitis-related gene PRss1 (cationic trypsinogen) did not reveal any mutations in these 3 ***: We found in 3 (2%) of 172 chronic pancreatitis patients an IVs3 + 2 T > C sPInK1 gene mutation and a base substitution 5’UTR-215 G > A inthe same gene copy. Most probably the 5’UTR-215 G >A represents a rare polymorphism and not a mutationas previously concluded. Haplotype analysis suggests acommon origin of the IVs3 + 2 T > C mutation in thesepatients.

关键词： Chronic pancreatitis serine protease inhibitor Kazal type 1 Gene mutations

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Two-Dimensional Transition Metal Carbides and nitrides(MXenes): synthesis, Properties, and Electrochemical Energy storage Applications

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Energy & Environmental Materials 2020年第1期3卷 29-55页

作者： Chuanfang (John) Zhang Yonglu Ma Xuetao Zhang sina Abdolhosseinzadeh Hongwei sheng Wei Lan Amir Pakdel jakob Heier frank nüesch Laboratory for functional Polymers EmpaSwiss Federal Laboratories for Materials Science and TechnologyUberlandstrasse 129CH-8600Dubendorf Switzerland Key Laboratory of special function Materials and structure Design Ministry of EducationSchool of Physical Science and TechnologyLanzhou UniversityLanzhou 730000China Institute of Materials science and Engineering Ecole Polytechnique Federale de Lausanne(EPFL)Station 12CH-1015Lausanne Switzerland Assoc.Prof.A.Pakdel school of Chemistry University College Dublin (UCD) Belfield Dublin 4 Ireland

A family of 2D transition metal carbides and nitrides known as MXenes has received increasing attention since the discovery of Ti3C2 in 2011. To date, about 30 different MXenes with well-defined structures and properties have been synthesized, and many more are theoretically predicted to exist. Due to the numerous assets including excellent mechanical properties, metallic conductivity,unique in-plane anisotropic structure, tunable band gap, and so on, MXenes rapidly positioned themselves at the forefront of the 2D materials world and have found numerous promising applications. Particular interest is devoted to applications in electrochemical energy storage, whereby 2D MXenes work either as electrodes,additives, separators, or hosts. This review summarizes recent advances in the synthesis, fundamental properties and composites of MXene and highlights the state-of-the-art electrochemical performance of MXene-based electrodes/*** progresses in the field of supercapacitors and Li-ion batteries, Li-s batteries, naand other alkali metal ion batteries are reviewed, and current challenges and new opportunities for MXenes in this surging energy storage field are presented. In the focus of interest is the possibility to boost device-level performance, particularly that of rechargeable batteries, which are of utmost importance in future energy technologies. Very recently, the 2019 nobel Prize in Chemistry was awarded to the inventors of the Li-ion battery. for sure, this will provide an additional stimulation to study fundamental aspects of electrochemical energy storage.

关键词： battery energy storage MXene supercapacitor transition metal carbide

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formation mechanisms of sub-micron pharmaceutical composite particles derived from far-and near-field Raman microscopy

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Journal of Pharmaceutical Analysis 2021年第4期11卷 480-489页

作者： jakob Hübner Jean-Baptiste Coty Yan Busby Denis spitzer nanomateriaux pour Les systemes sous sollicitations Extr^emes(ns3E) ISL-CNRS-UNISTRA UMR 3208French-German Research Institute of Saint-Louis5Rue Du General CassagnouB.P.7003468301Saint-LouisFrance spinofrin sAs 20 Bis Rue Danjou92100BoulogneBillancourtFrance

surface enhanced Raman spectroscopy(sERs) and confocal Raman microscopy are applied to investigate the structure and the molecular arrangement of sub-micron furosemide and polyvinylpyrrolidone(furosemide/PVP) particles produced by spray flash evaporation(sfE). Morphology, size and crystallinity of furosemide/PVP particles are analyzed by scanning electron microscopy(sEM) and X-ray powder diffraction(XRPD). far-field Raman spectra and confocal far-field Raman maps of furosemide/PVP particles are interpreted based on the far-field Raman spectra of pure furosemide and PVP *** far-field Raman microscopy shows that furosemide/PVP particles feature an intermixture of furosemide and PVP molecules at the sub-micron scale. sERs and surface-enhanced confocal Raman microscopy(sECo RM) are performed on furosemide, PVP and furosemide/PVP composite particles sputtered with silver(40 nm). sERs and sECo RM maps reveal that furosemide/PVP particle surfaces mainly consist of PVP molecules. The combination of surface and bulk sensitive analyses reveal that furosemide/PVP sub-micron particles are formed by the agglomeration of primary furosemide nanocrystals embedded in a thin PVP matrix. Interestingly, both far-field Raman microscopy and sECo RM provide molecular information on a statistically-relevant amount of sub-micron particles in a single microscopic map;this combination is thus an effective and time-saving tool for investigating organic sub-micron composites.

关键词： sERs Confocal Raman microscopy surface characterization sub-micron particles Pharmaceutic composites

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MicroRnAs in inflammatory bowel disease-pathogenesis,diagnostics and therapeutics

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World Journal of Gastroenterology 2012年第34期18卷 4629-4634页

作者： Mehmet Coskun Jacob Tveiten Bjerrum jakob Benedict seidelin Ole Haagen nielsen Department of Gastroenterology Medical Section 54 O3University of CopenhagenHerlev HospitalDK-2730 HerlevDenmark Department of Cellular and Molecular Medicine the Panum InstituteUniversity of CopenhagenDK-2200 Copenhagen NDenmark Department of Internal Medicine I University of CopenhagenBispebjerg HospitalDK-2400 Copenhagen NVDenmark

The pathogenesis of inflammatory bowel disease (IBD) is complex and largely unknown. Until recently, research has focused on the study of protein regulators in inflammation to reveal the cellular and molecular networks in the pathogenesis of IBD. However, in the last few years, new and promising insights have been generated from studies describing an association between an altered expression of a specific class of non-coding RnAs, called microRnAs (miRs or miRnAs) and IBD. The short (approximately 22 nucleotides), endogenous, single-stranded RnAs are evolutionary conserved inanimals and plants, and regulate specific target mRnAs at the post-transcriptional level. MiRnAs are involved in several biological processes, including development, cell differentiation, proliferation and apoptosis. furthermore, it is estimated that miRnAs may be responsible for regulating the expression of nearly one-third of the genes in the human genome. Thus, miRnA deregulation often results in an impaired cellular function, and a disturbance of downstream gene regulation and signaling cascades, suggesting their implication in disease etiology. Despite the identification of more than 1900 mature human miRnAs, very little is known about their biological functions and functional targets. Recent studies have identified dysregulated miRnAs in tissue samples of IBD patients and have demonstrated similar differences in circulating miRnAs in the serum of IBD patients. Thus, there is great promise that miRnAs will aid in the early diagnosis of IBD, and in the development of personalized therapies. Here, we provide a short review of the current state-of-the-art of miRnAs in IBD pathogenesis, diagnostics and therapeutics.

关键词： Biomarker Crohn's disease Diagnostics In-flammatory bowel disease MicroRnA Therapeutics Ulcer-ative colitis

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spectrally tunable high-power Yb:fiber chirped-pulse amplifier

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Photonics Research 2022年第10期10卷 2309-2316页

作者： VALEnTInA sHUMAKOVA VITO f.PECILE jakob fELLInGER MICHAEL LEsKOWsCHEK P.E.COLLIn ALDIA ALInE s.MAYER LUKAs W.PERnER sARPER sALMAn MInGQI fAn PRAnnAY BALLA sTÉPHAnE sCHILT CHRIsTOPH M.HEYL InGMAR HARTL GIL PORAT OLIVER H.HECKL Christian Doppler Laboratory for Mid-IR spectroscopy and semiconductor Optics Faculty Center for Nano Structure ResearchFaculty of PhysicsUniversity of ViennaA-1090 ViennaAustria Photonics Institute TU WienA-1040 ViennaAustria Vienna Doctoral school in Physics University of ViennaA-1090 ViennaAustria Deutsches Elektronen-synchrotron DEsY 22607 HamburgGermany Laboratoire Temps-fréquence Universitéde NeuchâtelCH-2000 NeuchâtelSwitzerland GsI Helmholtzzentrum für schwerionenforschung GmbH 64291 DarmstadtGermany Helmholtz-Institute Jena 07743 JenaGermany Department of Electrical and Computer Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada Department of Physics University of AlbertaEdmontonAlberta T6G 2E1Canada

Tailoring the properties of the driving laser to the need of applications often requires compromises among laser stability,high peak and average power levels,pulse duration,and spectral *** instance,spectroscopy with optical frequency combs in the extreme/visible ultraviolet spectral region requires a high peak power of the near-IR driving laser,and therefore high average power,pulse duration of a few tens of fs,and maximal available spectral ***,the parametric conversion efficiency is higher for pulses with a duration in the 100-fs range due to temporal walk-off and coating *** we suggest an approach to adjust the spectral characteristics of high-power chirped-pulse amplification(CPA)to the requirements of different nonlinear frequency converters while preserving the low-phase-noise(Pn)properties of the *** achieve spectral tunability,we installed a mechanical spectral shaper in a free-space section of the stretcher of an in-house-developed ytterbium-fiber-based CPA *** CPA system delivers 100 W of average power at a repetition rate of 132.4 *** gaining control over the spectral properties,we preserve the relative-intensity-noise and Pn properties of the *** high-power CPA can easily be adjusted to deliver either a spectrum ideal for mid-IR light generation(full width at half maximum of∼11 nm,compressed pulse duration of 230 fs)or a spectrum ideal for highly nonlinear processes such as high-harmonic generation(−10 dB level of>50 nm,transform-limited pulse duration of∼65 fs).

关键词： pulse power fiber

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synthesis and thermal behavior of [Li(thf)3(μ-Cl)La{n(siMe3)2}3] and its investigation as spin-coating precursor for lanthanum-based layer formation

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Journal of Rare Earths 2018年第5期36卷 537-543页

作者： Andrea Preuβ Elaheh Pousaneh Julian noll Tobias Rüffer Alexaner jakob Lutz Mertens Michael Mehring Heinrich Lang Technische Universitat Chemnitz Faculty of Natural Sciences Institute of Chemistry Inorganic Chemistry 09107 Chemnitz Germany Technische Universitat Chemnitz Faculty of Natural Sciences Institute of Chemistry Coordination Chemistry 09107 Chemnitz Germany

The lanthanum（Ⅲ） complex [Li（thf）3（μ-CI）La{n（siMe3）2}3]（3） was obtained by the reaction of LaCl3 with three equiv of Li[n（siMe3）2]3 in a tetrahydrofuran solution. The molecular structure of 3 in the solid state was characterized by a tetracoordinated anionic lanthanide（Ⅲ） amide in form of an adduct with LiCl（thf）3 as evidenced by single crystal X-ray structure analysis. In order to study the suitability of 3 as a precursor for the deposition of La2O3/LiLasiO4 by thin layer deposition techniques,its thermal behavior was investigated by thermogravimetry（TG） and TG-Ms-coupled studies. TG studies show a two-step decomposition process, whereby volatile decomposition products can be detected during the second decomposition step. TG measurements under an atmosphere of oxygen produced La2O3, Calcination processes of 3 under ambient atmosphere for 10 h at 1000 ℃ gave La2O3 and LiLasiO4,which was confirmed by PXRD studies. Metal-organic 3 was applied as spin-coating precursor for La2O3 thin film formation giving the as-deposited layers nearly crack-free.

关键词： Lanthanum Amide Thermogravimetry solid state structure spin-coating Rare earths

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