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Carbon nanotube films with ultrahigh thermal-shock and thermalshock-fatigue resistance characterized by ultra-fast ascending shock testing

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Nano Research 2024年第8期17卷 6777-6784页

作者： Mingquan Zhu Shijun Wang Yunxiang Bai Feng Gao Zhenxing Zhu Congying Wang Peng Zhang Hao Jin Hui Zhang Luqi Liu Zhiping Xu Xinghong Zhang Fei Wei Zhong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese academy of sciences Beijing 100049China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150001China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

The exploration of material failure behavior not only involves defining its limits and underlying mechanisms but also entails devising strategies for improvement and protection in extreme ***'ve pioneered an advanced multi-scale,high-speed ascending thermal shock testing platform capable of inducing unprecedented heat shocks at rates surpassing 105℃/*** meticulous examination of the thermal shock responses of carbon nanotube(CNT)films,we've achieved remarkable *** employing an innovative macro-scale synchronous tightening and relaxing approach,we've attained a critical temperature differential in CNT films that exceeds an exceptional 2500℃—surpassing any previously reported metric for highperformance,thermal-shock-resistant ***,these samples have demonstrated exceptional resilience,retaining virtually unchanged strength even after enduring 10,000 thermal shock cycles at temperatures exceeding 1000℃.Furthermore,our research has revealed a novel thermal shock/fatigue failure mechanism that fundamentally diverges from conventional theories centered on thermal stress.

关键词： carbon nanotubes failure behavior thermal shock characterization

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High precision magnetometer for geomagnetic exploration onboard of the China Seismo-Electromagnetic Satellite

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Science China(Technological sciences) 2018年第5期61卷 659-668页

作者： CHENG BingJun ZHOU Bin MAGNES Werner LAMMEGGER Roland POLLINGER Andreas National Space Science Center Chinese Academy of Sciences Space Research Institute Austrian Academy of Sciences Institute of Experimental Physics Graz University of Technology

The China Seismo-Electromagnetic Satellite(CSES) is the first platform of China's earthquake observation system in space and the first satellite of China's geophysical field detection missions. The high precision magnetometer(HPM), which contains two fluxgate sensors and a coupled dark state magnetometer(CDSM), measures the vector of the Earth's magnetic field with a bandwidth from DC to 15 Hz. The two fluxgate sensors are in a gradiometer configuration in order to reduce satellite interferences. Additionally, the CDSM sensor measures the scalar value of the magnetic field with higher accuracy and *** data processing and calibration methods have been prepared to get accurate vector magnetic field data. This includes the calibration of each of the three sensors, the absolute vector correction algorithm, the spacecraft magnetic interference elimination and the coordinate transformation method. Also the instrument performances based on ground calibration activities are shown in this article.

关键词： magnetometer fluxgate magnetometer CPT magnetometer magnetometer calibration data processing

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Ion Channels at the Nucleus： Electrophysiology Meets the Genome

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Molecular Plant 2010年第4期3卷 642-652页

作者： Antonius J.M. Matzkea Thomas M. Weiger Marjori Matzke Gregor Mendel Institute of Molecular Plant Biology Austrian Academy of Sciences Dr. Bohr-Gasse 3 A-1030 Vienna Austria Department of Cell Biology University of Salzburg A-5020 Salzburg Austria

The nuclear envelope is increasingly viewed from an electrophysiological perspective by researchers interested in signal transduction pathways that influence gene transcription and other processes in the nucleus. Here, we describe evidence for ion channels and transporters in the nuclear membranes and for possible ion gating by the nuclear pores. We argue that a systems-level understanding of cellular regulation is likely to require the assimilation of nuclear electrophysiology into molecular and biochemical signaling pathways.

关键词： Ion channel nuclear Ca^+2 signaling nuclear electrophysiology nuclear membrane nuclear pore.

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Ethylene and Cytokinin:Partners in Root Growth Regulation

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Molecular Plant 2019年第10期12卷 1312-1314页

作者： Christina Artner Eva Benkova Institute of Science and Technology Austria Am Campus 1KlosterneuburgAustria

Ethylene and cytokinin,two plant hormones with essential functions throughout the plant's life cycle,contribute to a wide spectrum of physiological,biochemical,and developmental *** the last decades,the molecular mechanisms underlying their biosynthesis and metabolism as well as pathways mediating their perception and signal transduction have been *** machineries controlling the activities of these two central hormonal regulators appear robust and autonomous,in the ever-changing environmental conditions that plants face,survival is dependent on their tight communication and mutually balanced activities.A recent work by Zdarska et al.(2019)is trying to address the challenging question regarding the mechanisms underlying the cytokinin and ethylene *** study reveals an intriguing,multilayered nature of hormonal interaction,in which the EHYLENE RESISTANT 1(ETR1)receptor upon perceiving an ethylene signal activates a multistep phosphorelay(MSP)cytokinin transduction cascade,integrating ethylene and cytokinin in the control of root apical meristem *** parallel,activation of canonical ethylene signaling adjusts the responsiveness of the cytokinin pathway by transcriptional upregulation of one of its key signaling components,the ARR10 response regulator(Figure 1).Importantly,unlike the canonical ethylene transduction machinery,ethylene input into the MSP is dependent on histidine kinase activity of ETR1 receptor.

关键词： Ethylene Root metabolism

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Treatment options in stage I seminoma

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Oncology Research 2022年第3期30卷 117-128页

作者： UROS BUMBASIREVIC MARKO ZIVKOVIC MILOS PETROVIC VESNA CORIC NIKOLA LISICIC NEBOJSA BOJANIC Clinic of Urology University Clinical Center of SerbiaBelgrade11000Serbia Faculty of Medicine University of BelgradeBelgrade11000Serbia Institute of Medical and Clinical Biochemistry Faculty of MedicineUniversity of BelgradeBelgrade11000Serbia

Seminomas are most commonly diagnosed in clinical stage I(CSI).After orchiectomy,approximately 15%of patients in this stage have subclinical *** radiotherapy(ART)delivered to the retroperitoneum and ipsilateral pelvic lymph nodes has been the mainstay of treatment for many *** highly efﬁcient,with long-term cancer-speciﬁc survival(CSS)rates approaching almost 100%,ART is associated with considerable long-term consequences,particularly cardiovascular toxicity and increased risk of secondary malignancies(SMN).Therefore,active surveillance(AS)and adjuvant chemotherapy(ACT)were developed as alternative treatment *** AS prevents patient overtreatment,it is associated with strict follow-up regimens and increased radiation exposure due to repeated *** to equivalent CSS rates to ART,and lower toxicity,one course of adjuvant carboplatin presents the cornerstone of chemotherapy for CSI *** is almost 100%for patients with CSI seminoma,regardless of the chosen treatment ***,a personalized approach in treatment selection is ***,routine radiotherapy for CSI seminoma patients is no longer ***,it should be reserved for patients who are unﬁt or unwilling for AS or ***ﬁcation of prognostic factors for disease relapse allowed for the development of risk-adapted treatment strategy and stratiﬁcation of patients in low-risk and high-risk *** risk-adapted policy needs further validation,surveillance is currently recommended in low-risk patients,while ACT is reserved for patients with a higher risk of relapse.

关键词： Chemotherapy Radiotherapy Risk-adapted strategy Seminoma Surveillance

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Electrochemical solid-state amorphization in the immiscible Cu-Li system

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Science Bulletin 2018年第18期63卷 1208-1214页

作者： Muhua Sun Jiake Wei Zhi Xu Qianming Huang Yu Zhao Wenlong Wang Xuedong Bai Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences School of Physical sciences University of Chinese Academy of Sciences

As a typical immiscible binary system, copper (Cu) and lithium (Li) show no alloying and chemical intermixing under normal circumstances. Here we show that, when decreasing Cu nanoparticle sizes into ultrasmall range, the nanoscale size effect can play a subtle yet critical role in mediating the chemical activity of Cu and therefore its miscibility with Li, such that the electrochemical alloying and solidstate amorphization will occur in such an immiscible system. This unusual observation was accomplished by performing in-situ studies of the electrochemical lithiation processes of individual CuO nanowires inside a transmission electron microscopy (TEM). Upon lithiation, CuO nanowires are first electrochemically reduced to form discrete ultrasmall Cu nanocrystals that, unexpectedly, can in turn undergo further electrochemical lithiation to form amorphous Cu Lixnanoalloys. Real-time TEM imaging unveils that there is a critical grain size (ca. 6 nm), below which the nanocrystalline Cu particles can be continuously lithiated and amorphized. The possibility that the observed solid-state amorphization of Cu-Li might be induced by electron beam irradiation effect can be explicitly ruled out; on the contrary, it was found that electron beam irradiation will lead to the dealloying of as-formed amorphous Cu Lixnanoalloys.

关键词： Immiscible Cu-Li system Electrochemical solid-state amorphization Nanoscale size effect In-situ TEM Lithium ion battery

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Total Ionization Dose Effects on Charge Storage Capability of Al2O3/HfO2/Al2O3-Based Charge Trapping Memory Cell

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Chinese Physics Letters 2018年第11期35卷 86-89页

作者： Yan-Nan Xu Jin-Shun Bi Gao-Bo Xu Bo Li Kai Xi Ming Liu Hai-Bin Wang Li Luo Institu te of Microelectronics Chinese Academy of SciencesBeijing 100029 University of Chinese academy of sciences Beijing 100049 School of lnternet of Things Engineering HoHai UniversityChangzhou 213022 Beijing Jiaotong University Beijing 100044

Because of the discrete charge storage mechanism, charge trapping memory（CTM） technique is a good candidate for aerospace and military missions. The total ionization dose（TID） effects on CTM cells with Al2O3/HfO2/Al2O3（AHA） high-k gate stack structure under in-situ 10 keV x-rays are studied. The C-V characteristics at different radiation doses demonstrate that charge stored in the device continues to be leaked away during the irradiation,thereby inducing the shift of flat band voltage（V（fb））. The dc memory window shows insignificant changes, suggesting the existence of good P/E ability. Furthermore, the physical mechanisms of TID induced radiation damages in AHA-based CTM are analyzed.

关键词： AHA Total Ionization Dose Effects on Charge Storage Capability of Al2O3/HfO2/Al2O3-Based Charge Trapping Memory Cell Al

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Total Ionizing Dose Effects of 55-nm Silicon-Oxide-Nitride-Oxide-Silicon Charge Trapping Memory in Pulse and DC Modes

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Chinese Physics Letters 2018年第7期35卷 130-133页

作者：李梅毕津顺徐彦楠李博习凯王海滨刘璟李金季兰龙骆丽刘明 Key Laboratory of Microelectronics Devices and Integrated Technology Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 University of Chinese academy of sciences Beijing 100049 School of Internet of Things Engineering HoHai University Changzhou 213022 Beijing Jiaotong University Beijing 100044

The （60）Co-γ ray total ionizing dose radiation responses of 55-nm silicon-oxide-nitride-oxide-silicon（SONOS） memory cells in pulse mode（programmed/erased with pulse voltage） and dc mode（programmed/erased with direct voltage sweeping） are investigated. The threshold voltage and off-state current of memory cells before and after radiation are measured. The experimental results show that the memory cells in pulse mode have a better radiation-hard capability. The normalized memory window still remains at 60% for cells in dc mode and 76% for cells in pulse mode after 300 krad（Si） radiation. The charge loss process physical mechanisms of programmed SONOS devices during radiation are analyzed.

关键词： Cells

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TOLs Function as Ubiquitin Receptors in the Early Steps of the ESCRT Pathway in Higher Plants

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Molecular Plant 2020年第5期13卷 717-731页

作者： Jeanette Moulinier-Anzola Maximilian Schwihla Lucinda De-Araujo Christina Artner Lisa Jorg Nataliia Konstantinova Christian Luschnig Barbara Korbei Institute of Molecular Plant Biology Department of Applied Genetics and Cell BiologyUniversity of Natural Resources and Life SciencesVienna(BOKU)Muthgasse 181190 ViennaAustria Department of Molecular Toxicology and Environment Biotechnology Center-Eduardo Mondlane UniversityAv.de MocambiqueKm 1.5.MaputoMozambique Institute of Science and Technology Austria(1ST Austria) Am Campus 13400 KlosterneuburgAustria

Protein abundance and localization at the plasma membrane(PM)shapes plant development and mediates adaptation to changing environmental *** is regulated by ubiquitination,a post-translational modification crucial for the proper sorting of endocytosed PM proteins to the vacuole for subsequent *** understand the significance and the variety of roles played by this reversible modification,the function of ubiquitin receptors,which translate the ubiquitin signature into a cellular response,needs to be *** this study,we show that TOL(TOM1-like)proteins function in plants as multivalent ubiquitin receptors,governing ubiquitinated cargo delivery to the vacuole via the conserved Endosomal Sorting Complex Required for Transport(ESCRT)***2 and TOL6 interact with components of the ESCRT machinery and bind to K63-linked ubiquitin via two tandemly arranged conserved ubiquitin-binding *** of these domains results not only in a loss of ubiquitin binding but also altered localization,abolishing TOL6 ubiquitin receptor *** and localization of TOL6 is itself regulated by ubiquitination,whereby TOL6 ubiquitination potentially modulates degradation of PM-localized cargoes,assisting in the fine-tuning of the delicate interplay between protein recycling and *** together,our findings demonstrate the function and regulation of a ubiquitin receptor that mediates vacuolar degradation of PM proteins in higher plants.

关键词： ubiquitination ESCRT pathway ubiquitin receptor plasma membrane protein degradation

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Design and optical performance investigation of all-sprayable ultrablack coating

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Nano Research 2023年第12期16卷 12901-12909页

作者： Chen Shen Huiyong Li Shuai Sun Hui Zhang Lanqin Yan Zhong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese academy of sciences Beijing 100049China Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Laboratory of Flexible Electronics Technology Department of ChemistryTsinghua UniversityBeijing 100084China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

Although ultrablack surfaces are urgently needed in wide applications owing to their extremely low reflectance over a broadband wavelength,obtaining simultaneously the ultrablackness and mechanical robustness by simple process technique is still a great ***,by decoupling different light extinction effects to different layers of coating,we design an ultrablack coating that is all-sprayable in whole *** coating presents low reflectance over visible–mid-infrared(VIS–MIR)wavelength(av.R≈1%in VIS),low multi-angle scattering(bidirectional reflection distribution function(BRDF)=10-2–10-3 sr-1),together with good substrate adhesion grade and self-cleaning ability,which are superior to most reported sprayable ultrablack *** light extinction effects of each layer are *** method is also applicable in other material systems.

关键词： ultrablack spray-coating carbon nanomaterials multiple scattering intermediate layer

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