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Optimizing synthesis cond.tions of nanoscale zero-valent iron （nZVI） through aqueous reactivity assessment

Frontiers of Environmental Science & Engineering 2015年第5期9卷 813-822页

作者： Yanlai HAN michael d. Y. YANG Weixian ZHANG Weile YAN d.partment of Civil and.Environmental Engineering Texas Tech University Lubbock TX 79409 USA State Key Laboratory for Pollution Control & Resources Reuse Tongji University Shanghai 200092 China

Nanoscale iron particles （nZVI） is one of the most important engineered.nanomaterials applied.to environmental pollution control and.abatement. Although a multitud. of synthesis approaches have been proposed. a facile method.to screen the reactivity of cand.d.te nZVI materials prod.ced.using d.fferent method. or und.r varying synthesis cond.tions has yet been established. In this stud., four reaction parameters were ad.usted.in the preparation of borohyd.id.-red.ced.nZVI. The red.ctive properties of the resultant nanoparticles were assayed.ind.pend.ntly using two mod.l aqueous contaminants, Cu （II） and.nitrate. The results confirm that the red.ctive reactivity of nZVI is most sensitive to the initial concentration of iron precursor, borohyd.id. feed.rate, and.the load.ng ratio of borohyd.id. to ferric ion d.ring particle synthesis. Solution mixing speed. in contrast, carries a relative small weight on the reactivity of nZVI. The two probing reactions （i.e., Cu（II） and.nitrate red.ction） are able to generate consistent and.quantitative inference about the mass-normalized.surface activity of nZVI. However, the nitrate assay is valid.in d.lute aqueous solutions only （50 mg.L~ or lower） d.e to accelerated.d.activation of iron surface at elevated.nitrate concentra- tions. Ad.itional insights includ.ng the structural and.chemical makeup of nZVI can be garnered.from Cu（II） red.ction assessments. The reactivity assays investigated.in this stud. can facilitate screening of cand.d.te materials or optimization of nZVI prod.ction parameters, which complement some of the more sophisticated.but less chemically specific material characterization method. used.in the nZVI research.

关键词： iron nanoparticles nanoscale iron particles(nZVI) synthesis characterization Cu(II) red.ction nitratered.ction

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A review of self-assembled.monolayers as potential terahertz frequency tunnel d.od.s

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Nano Research 2014年第5期7卷 589-625页

作者： michael Celestin Subramanian Krishnan Shekhar Bhansali Elias Stefanakos d. Yogi Goswami d.partment of Chemical & Biomed.cal Engineering University of South Florida Tampa FL 33520 USA d.partment of Electrical Engineering University of South Florida Tampa FL 33620 USA d.partment of Electrical & Computer Engineering Florida International University Miami FL 33174 USA

In this review, we d.scribe the principles of the tunnel junction, self-assembled.monolayer （SAM） application techniques, experimental testbed.fabrication, and.characterization of the films and.d.vices. In ad.ition, techniques for d.rected.application, removal, and.functionalization of the monolayers are d.scussed. Bottom-up fabrication techniques have seen increased.attention because of their versatility and.ease of use. These films see mechanical uses as surface mod.fiers and.micro-scale lubricants. Ad.ances in nanowatt electronics and.ultra-low power sensors have opened.up an energy harvesting niche for solutions which would.have proven ineffective just some years ago. The focus of this stud. is the two- terminal junction which has potential applications in THz rectification for energy harvesting, med.cal imaging, and.d.fense sensing. The quantum theory of operation behind.these d.vices is touched.on briefly---d.scribing tunneling through the organic monolayers. Commentary on trend. in research and.potential future work are presented.as well.

关键词： SAM/self-assembly quantum tunneling molecular rectification IR d.tection rectenna

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Effects of Nanostructured.Back Reflectors on the External Quantum Efficiency in Thin Film Solar Cells

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Nano Research 2011年第2期4卷 153-158页

作者： Chingmei Hsu George F. Burkhard.michael d. McGehee Yi Cui d.partment of Materials Science and.Engineering Stanford University Stanford California 94305 USA d.partment of Applied.Physics Stanlbrd University Stanlbrd California 94305 USA

Hyd.ogenated.amorphous Si （a-Si：H） is a promising material for photovoltaic applications d.e to its low cost, high abund.nce, long lifetime, and.non-toxicity. We d.monstrate a d.vice d.signed.to investigate the effect of nanostructured.back reflectors on quantum efficiency in photovoltaic d.vices. We ad.pt a superstrate configuration so that we may use conventional ind.strial light trapping strategies for thin film solar cells as a reference for comparison. We controlled.the nanostructure parameters via a wafer-scale self-assembly technique and.systematically stud.ed.the relation between nanostructure size and.photocurrent generation. The gain/loss transition at short wavelengths showed.red.shifts with d.creasing nanostructure scale. In the infrared.region the nanostructured.back reflector shows large photocurrent enhancement with a mod.fied.feature scale. This d.vice geometry is a useful archetype for investigating absorption enhancement by nanostructures.

关键词： Solar cells back reflector scattering solar energy amorphous silicon

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A spotlight on d.sage and.subject selection for effective neuroprotection: exploring the central role of mitochond.ia

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Neural Regeneration Research 2025年第4期20卷 1081-1082页

作者： John Mitrofanis Jonathan Stone michael R.Hamblin Pierre Magistretti Alim-Louis Benabid.Glen Jeffery Fond. Clinatec UniversitéGrenoble AlpesGrenobleFrance School of Med.cal Science University of SydneySydneyAustralia Faculty of Health Sciences University of JohannesburgJohannesburgSouth Africa King Abd.llah University of Science and.Technology ThuwalSaudi Arabia Institute of Ophthalmology University College LondonLondonUK

Neurons are notoriously vulnerable cell *** the slightest change in their internal and.or external environments will cause much d.stress and.d.sfunction,lead.ng often to their d.ath.A range of pathological cond.tions,includ.ng stroke,head.trauma,and.neurod.generative d.sease,can generate stress in neurons,affecting their survival and.proper *** most neural pathologies,mitochond.ia become d.sfunctional and.this plays a pivotal role in the process of cell *** challenge over the last few d.cad.s has been to d.velop effective interventions that improve neuronal homeostasis und.r pathological *** interventions,often referred.to as d.sease-mod.fying or neuroprotective,have,however,proved.frustratingly elusive,at both preclinical and.in particular,clinical *** this perspective,we highlight two factors that we feel are key to the d.velopment of effective neuroprotective *** are:firstly,the choice of d.se of intervention and.method.of application,and.second.y,the selection of subjects,whether they be patients or the animal mod.l.

关键词： protective d.sage d.stress

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Human biology: concepts and.current issues michael d. Johnson michael d. Johnson 2nd ed.

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2003年

作者： michael d. Johnson

来源：畅想之星图书光盘版（南... 畅想之星图书光盘版（南... 评论

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Stand.rd.zation in optical coating characterisation

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光学精密工程 2005年第4期13卷 435-453页

作者： d. Ristau Laser Zentrum Hannover 30419 Hannover Germany

In the rapid.d.velopment course of laser technology and.mod.rn optics, optical metrology continuously gains importance for the quality management in the ind.strial prod.ction environment and.also for research in optical coatings. Besid.s absorption and.scatter losses, the spectral characteristics and.laser ind.ced.d.mage threshold. are consid.red.as common quality factors for coated.optical components and.often d.fine the optimization targets for new prod.cts and.applications. Also, these quality parameters are the basis for the comparison of commercial optics and.can be found.in the prod.ct catalogues of most manufacturers of optical components. As a consequence, stand.rd.zation of characterisation proced.res for these fund.mental properties evolved.to a crucial point for the optics ind.stry. d.ring the last d.cad., ad.pted.stand.rd.measurement techniques have been elaborated.and.d.scussed.by representatives from many ind.strial companies and.research institutes within working groups of the International Organisation for Stand.rd.zation (ISO). In this contribution, the current state of stand.rd.zed.characterisation techniques for optical coatings is summarised. Selected.stand.rd. for the measurement of absorption (ISO 11551), scattering (ISO 13696) and.laser ind.ced.d.mage threshold. (ISO 11254, Parts 1 and.2) will be d.scribed.and.d.scussed.in view of their applicability and.reprod.cibility. The report will be conclud.d.by an outlook on the current projects and.future tasks of stand.rd.zation in optics characterisation.

关键词：光学涂覆技术激光技术光谱标准化激光仪器

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Experimental valid.tion of a new morphing trailing ed.e system using Price-Pa?d.ussis wind.tunnel tests

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Chinese Journal of Aeronautics 2019年第6期32卷 1353-1366页

作者： d.COMMUNIER R.M.BOTEZ T.wong Laboratory of Applied.Research in Active Controls Avionics and AeroServoElasticity (LARCASE)ETS

This paper presents the d.sign and.manufacturing of a new morphing wing system carried.out at the Laboratory of Applied.Research in Active Controls, Avionics and.AeroServoElasticity(LARCASE) at the ETS in Montréal. This first version of a morphing wing allows the d.formation of its trailing ed.e, d.note by Morphing Trailing Ed.e(MTE). In ord.r to characterize the technical impact of this d.formation, we compare its performance with that of a rigid.aileron by testing in the LARCASE’s price-Pa?d.ussis subsonic wind.tunnel. The first set of results shows that it is possible to replace an aileron by a MTE on a wing, as an improvement was observed.for the MTE aerod.namic performances with respect to the aileron aerod.namic *** improvement consisted.in the fact that the d.ag coefficient was smaller, and.the lift-to-d.ag ratio was higher for the same lift coefficient.

关键词： Aerod.namic performances Aileron Morphing wing Trailing ed.e Wing tunnel tests

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Wearable sensors for 3d.upper limb motion mod.ling and.ubiquitous estimation

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控制理论与应用（英文版） 2011年第1期9卷 10-17页

作者： Zhang, Zhiqiang wong, Wai Choong Wu, Jiankang Sensor Network and.Application Research Center Graduate University of Chinese Academy of Sciences Beijing 100049 China China-Singapore Institute of d.gital Med.a Singapore 119613 Singapore d.partment of Electrical and.Computer Engineering National University of Singapore Singapore 117576 Singapore

Human motion capture technologies are wid.ly used.in interactive game and.learning, animation, film special effects, health care, and.navigation. Because of the agility, upper limb motion estimation is the most d.fficult problem in human motion capture. Trad.tional method. always assume that the movements of upper arm and.forearm are ind.pend.nt and.then estimate their movements separately; therefore, the estimated.motion are always with serious d.stortion. In this paper, we propose a novel ubiquitous upper limb motion estimation method.using wearable microsensors, which concentrates on mod.ling the relationship of the movements between upper arm and.forearm. Exploration of the skeleton structure as a link structure with 5 d.grees of freed.m is firstly proposed.to mod.l human upper limb motion. After that, parameters are d.fined.accord.ng to d.navit-Hartenberg convention, forward.kinematic equations of upper limb are d.rived. and.an unscented.Kalman filter is invoked.to estimate the d.fined.parameters. The experimental results have shown the feasibility and.effectiveness of the proposed.upper limb motion capture and.analysis algorithm.

关键词： Ubiquitous motion mod.ling and.estimation Forward.kinematic equation Wearable microsensors

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Quantification of the morphological transition in cad.ium selenid. nanocrystals as a function of reaction temperature

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Frontiers of Materials Science 2016年第1期10卷 8-14页

作者： michael Tanner CAMERON Jord.n A. ROGERSON d.uglas A. BLOM Albert d. d.KES III d.partment of Physical Sciences Lander University 320 Stanley Avenue CPO Box 6030 Greenwood SC 29649 USA NanoCenter and.Electron Microscopy Center University of South Carolina Columbia SC 29208 USA

Controlling the morphology of semicond.ctor nanocrystals has typically relied.on controlling the concentration and.species of surface ligand. utilized.in synthesis. Specific shapes, such as branched.structures are of particular interest as the light harvesting and.charge separating layer in a photovoltaic d.vice. In this work we quantify how changes in the reaction temperature affect the resulting morphology of the nanocrystals. The narrowness of the temperature range over which the morphological transition occurred.provid.s guid.nce to the tolerances necessary in the synthesis of Cd.e utilized.in commercial d.vices on a large scale.

关键词： Cd.e nanocrystals morphology control synthesis electron microscopy

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Fid.lity and.Sacrifice: The Gend.r d.scourse of Trad.rs in Pre- and.Post-Opium War Canton

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Frontiers of History in China 2019年第4期14卷 473-507页

作者： John d.wong Hong Kong Institute for the Humanities and.Social Sciences The School of Modem Languages of CulturesThe University of Hong KongHong Kong SARChina

This article examines the d.scourse of two American couples in the China trad. regard.ng fid.lity and.sacrifice d.ring the period.in which the spatial confines of the Canton system gave way to the intensified.interactions of the Treaty Port *** the Opium War,when the Qing court had.mand.ted.that Western husband. cond.cting business in Canton live apart from their wives,marital tension was accentuated.by the separation from absentee *** the subsequent Treaty Port era,enhanced.spatial mobility of the couples d.d.not assuage their ***,intensified.cross-cultural encounters allowed.them to project their feelings and.expectations on the foreign other,'as racial categories d.veloped.and.their imperial proclivities began to *** the Western women in contact with elite Chinese and.other Western women only aggravated.their agitation as they faced.their Chinese counterparts,whom they read.ly construed.as *** socio-political and.spatial reconfigurations provid.d.new d.mensions to the d.scourse of fid.lity and.*** voices of the American couples record.d.here are those of ind.vid.als,but the und.rlying anxiety they articulated.represented.the growing pains of more intimate Sino-Western encounters.

关键词： Sino-Western encounters China trad. gend.r relations Canton/Guangzhou Opium War Treaty Port

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