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材料科学与工程（中英文版） 2010年第1期4卷 1-10页

作者： Luis De Los Santos V Angel Bustamante D. Lizbet Leon F. Th.nos Mitrelias Adrian Ionescu JustinianoQuispe M. crispin h. w. barnes Cavendish.Laboratory University of Cambridge J. J Thomson .Av. Cambridge CB3 0HE United Kingdom Facultad de Ciencias Fisicas Universidad Nacional Mayor de San Marcos Ap. Postal 14-0149 Peru

Ch.mical Solution Deposition of YBa2Cu3O7 Films on YSZ （100） Substrates

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Journal of Ch.mistry and Ch.mical Engineering 2014年第6期8卷 547-551页

作者： h.nry Elías Sanch.z Comejo Angel Bustamante Dominguez1 Ana María Osorio Luis De Los Santos Valladares José Albino Aguiar crispin h. w. barnes Ceramics and Nanomaterials Laboratory Department of Physics Major National University of San Marcos Lima 14-0149 Peru Department of Ch.mistry and Ch.mical Engineering Major National University of San Marcos Lima 14-0149 Peru Superconductivity and Advanced Materials Laboratory Department of Physics Federal University of Pernambuco Recife50670-901 Brazil Cavendish.Laboratory Department of Physics University of Cambridge Cambridge CB3 0HE United Kingdom

w. report th. epitaxial grow.h.of YBCO （YBa2Cu3O7） films on YSZ （Yttria-stabilized Zirconia）（100） substrates by ch.mical solution deposition. Th. precursor solution w.s prepared by dissolving stoich.ometric amounts of acetates of Y（OOCCh.）3·4h.O, Ba（OOCCh.）2 and Cu（OOCCh.）·2h.O in an aqueous solution of oxalic acid （h.C2O4） and follow.ng th. sol-gel route. Th.s solution w.s directly dripped onto YSZ （100） substrates w.th.th. h.lp of a Fish.r pipette. To form th. YBCO film, th. sample w.s crystallized by annealing at 860 ℃ for 12 h.in an oxidizing atmosph.re. Th. ch.racterization w.s performed by XRD （X-ray diffraction） analysis w.0}ch.revealed h.gh.intensity （001） reflections and denoted th.t most of th. grains w.re c-axis oriented. Randomly oriented grains and oth.r ph.ses such.as Y2BaCuO5 and CuO w.re also detected. Th. superconducting YBCO ph.se is demonstrated from th. susceptibility versus temperature measurements w.0}ch.indicate a superconducting critical temperature ≈ 90 K. In addition, a surface morph.logy analysis w.s performed by optical microscopy and atomic force microscopy w.0}ch.revealed an average rough.ess of 0.2197 μm.

关键词： Sol-gel meth.d epitaxial grow.h YBCO superconductor layers.

Ch.rge qubits based on ultra-th.n topological insulator films

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Frontiers of ph.sics 2024年第3期19卷 71-81页

作者： Kexin Zh.ng h.go V.Lepage Ying Dong crispin h.w.barnes Research.Center for Quantum Sensing Intelligent Perception Research InstituteZhejiang LabHangzhou 311121China Cavendish.Laboratory Department of PhysicsUniversity of CambridgeCambridge CB30HEUnited Kingdom

w. study h.w.to use th. surface states in a Bi2Se3 topological insulator ultra-th.n film th.t are affected by finite size effects for th. purpose of quantum *** demonstrate th.t:(i)surface states under th. finite size effect can effectively form a tw.-level system w.0}re th.ir energy levels lie in betw.en th. bulk energy gap and a logic qubit can be constructed,(ii)th. qubit can be initialized and manipulated using electric pulses of simple forms,(iii)tw.-qubit entanglement is ach.eved th.ough.a√Sw.P operation w.0}n th. tw. qubits are in a parallel setup,and(iv)alternatively,a Floquet state can be exploited to construct a qubit and tw. Floquet qubits can be entangled th.ough.a Controlled-NOT *** Floquet qubit offers robustness to background noise since th.re is alw.ys an oscillating electric field applied,and th. single qubit operations are controlled by amplitude modulation of th. oscillating field,w.0}ch.is convenient experimentally.

关键词： topological insulator quantum computing nanodevices

A Finite Element Meth.d for Modelling Electromech.nical w.ve Propagation in Anisotropic Piezoelectric Media

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Communications in Computational Ph.sics 2007年第2期2卷 271-292页

作者： S.Rah.an h.P.Langtangen C.h.w.barnes Cavendish.Laboratory Cambridge UniversityJ J Thomson AvenueCambridgeCB3 OHEUnited Kingdom Simula Research.Laboratory Martin Linges v 17Fornebu P.O.Box 1341325 LysakerNorway

w. describe and evaluate a numerical solution strategy for simulating surface acoustic w.ves(SAw.)th.ough.semiconductor devices w.th.complex *** multi-ph.sics problem is of particular relevance to th. design of SAw.based quantum electronic *** math.matical model consists of tw. coupled partial differential equations for th. elastic w.ve propagation and th. electric field,respectively,in anisotropic piezoelectric *** equations are discretized by th. finite element meth.d in space and by a finite difference meth.d in *** latter meth.d yields a convenient numerical decoupling of th. governing *** describe h.w.a computer implementation can utilize th. decoupling and,via object-oriented programming tech.iques reuse independent codes for th. Poisson equation and th. linear time-dependent elasticity *** w. apply th. simulator to a simplified model problem for verifying th. implementation,and th.reafter w. sh.w.th.t th. meth.dology is capable of simulating a real-w.rld case from nanotech.ology,involving SAw. in a geometrically non-trivial device made of Gallium ***:***,***,*** Key w.rds:Finite element meth.d,piezoelectric surface acoustic w.ves,Gallium Arsenide.

关键词： Finite element meth.d piezoelectric surface acoustic w.ves Gallium Arsenide.

Ph.sical and ch.mical ch.racterization of sediments from an Andean river exposed to mining and agricultural activities: Th. Moquegua River, Peru

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International Journal of Sediment Research 2022年第6期37卷 780-793页

作者： Luis de Los Santos Valladares Juan Luis Ccamapaza Renato Arturo Valencia-Bedregal Luis Enrique Borja-Castro Jose Velazquez-Garcia Deh.w.lage h.rsh.ni Nimalika Perera Adrian Ionescu David Arvidsson Eustace Peregrine barnes Peter New.on h.go Lepage Patrick Byrne Angel Guillermo Bustamante Dominguez crispin h.w.barnes Cavendish.Laboratory Department of Physics University of Cambridge Escuela Acad emico Profesional de Ingeniería Ambiental Universidad Nacional de Moquegua Provincia de Mariscal Nieto Laboratorio de Cer amicos y Nanomateriales Facultad de Ciencias Físicas Universidad Nacional Mayor de San Marcos Sch.ol of Biological and Environmental Science Liverpool John Moores University

Th.s study presents an analysis of sediments in an Andean river impacted by both.natural conditions and anth.opogenic activities. Fifty samples w.re collected from selected sites th.ough.ut th. Moquegua River drainage basin, and Tambo River h.adw.ters at Pasto Grande, in Peru, and analysed w.th.X-ray diffraction, energy dispersive X-ray spectroscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy and th.rmogravimetric analysis. Si, Ca, Al, Fe, and O, common constituents of soils, w.re dominant, along w.th.K, N, and P. Th. latter originating as primary macronutrients or ch.mical residuals from fertilizers used in agriculture. h.gh.r concentrations of macronutrients and organic components w.re found in agricultural and urban areas, respectively. Arsenic minerals w.re also detected, w.0}ch.occur naturally, but possibly at levels augmented by anth.opogenic activity. Th. application of cluster analysis revealed clustering betw.en arsenic, arsenolite, and potassium but no significant geospatial correlation betw.en sample sites in th. drainage basin.

关键词： Andean river Moquegua river Sediments Fourier-transform infrared spectroscopy TG-DTG/DTA Clustering analysis

Stability of freeze-dried ph.responsive dextrin nanogels containing doxorubicin

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Asian Journal of Ph.rmaceutical Sciences 2016年第5期11卷 648-654页

作者： Somkamol Manch.n crispin R.Dass Pornsak Sriamornsak Department of Ph.rmaceutical Tech.ology Faculty of PharmacySilpakorn UniversityNakhon Pathom 73000Thailand Ph.rmaceutical Biopolymer Group(PBiG) Faculty of PharmacySilpakorn UniversityNakhon Pathom 73000Thailand Sch.ol of Ph.rmacy Faculty of Health SciencesCurtin UniversityPerth 6845Australia Curtin h.alth.Innovation Research.Institute of Ageing and Ch.onic Disease Bentley 6102Australia

Induction of non-specific toxicities by doxorubicin(DOX) h.s restricted conventional DOXbased ch.moth.rapy. p h.responsive dextrin nanogels(DNGs) h.ve been fabricated in order to incorporate and deliver DOX to specific(targeted) sites. h.w.ver, adequate stability studies of DOX-loaded DNGs are required for selection of storage conditions. Th. aim of th.s study w.s th.refore to evaluate th. accelerated(25 °C/60% Rh. and long-term(5 °C) stability of DNGs prepared w.th.formaldeh.de(FDNGs) and glyoxal(GDNGs) as cross-linker by determining th. ch.nge in th.ir ph.sicoch.mical properties. Th. mean diameter decreased w.th.time during long-term storage. Th. drug content betw.en fresh.y prepared(initial day) and after storage at 5 °C for 180 days of DOX-loaded FDNGs and DOX-loaded GDNGs w.s not significantly different(p > 0.05), but decreased after storage under th. accelerated condition. Th. release of DOX from all DNGs w.s ph.dependent. h.w.ver, DNGs kept under th. accelerated condition sh.w.d h.gh.r amount of DOX release th.n th.se stored at 5 °C and th. fresh.y prepared ones. Th. results indicate th.t th. stability of DNGs could be improved by th.ir storage at 5 °C.

关键词： Stability Nanogels Dextrin

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Tow.rds electroch.mical h.drogen storage in liquid organic h.drogen carriers via proton-coupled electron transfers

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Journal of Energy Ch.mistry 2022年第10期31卷 292-300,I0007页

作者： h.mid Gh.rbani Sh.raz Mikh.il Vagin Tero-Petri Ruoko Viktor Gueskine Krzysztof Karon Mieczystaw.tapkow.ki Tobias Abrah.msson Th.mas Ederth.Magnus Berggren Xavier crispin Laboratory of Organic Electronics Department of Science and Technology(ITN)Linkoping UniversitySE-60174 NorrkopingSweden Smart Ph.tonic Materials Facuty of Engineering and Natural SciencesTampere UniversiyPBox 541.Tampere Fl-33101Finland Silesian University of Tech.ology.Faculty of Ch.mistry Deparment of Physical Chemistry and Technology of PolymersM.Strzody 9.44-100 GliwicePoland dDepartment of Ph.sics Chemistry and Biology(IFM)Linkoping UniversiySE-58183 LinkopingSweden

Green h.drogen is identified as one of th. prime clean energy carriers due to its h.gh.energy density and a zero emission of CO_(2).A possible solution for th. transport of h.(2)in a safe and low.cost w.y is in th. form of liquid organic h.drogen carriers(LOh.s).As an alternative to loading LOh. w.th.h.(2)via a tw.-step procedure involving preliminary electrolytic production of h.(2)and subsequent ch.mical h.drogenation of th. LOh.,w. explore h.re th. possibility of electroch.mical h.drogen storage(Eh.)via conversion of proton of a proton donor into a h.drogen atom involved in covalent bonds w.th.th. LOh.(R)via a protoncoupled electron transfer(PCET)reaction:2nh.(+)+2ne^(-)+Rox■n h.(2)^(0)*** ch.se 9-fluorenone/fluorenol(Fnone/Fnol)conversion as such.a model PCET *** electroch.mical activation of Fnone via tw. sequential electron transfers w.s monitored w.th.in-situ and operando spectroscopies in absence and in presence of different alcoh.ls as proton donors of different reactivity,w.0}ch.enabled us to both.quantify and get th. mech.nistic insigh. on *** possibility of h.drogen extraction from th. loaded carrier molecule w.s illustrated by ch.mical activation.

关键词： Proton-coupled electron transfer Electroch.mical h.drogen storage h.drogen bonding agent Anion-radical Comproportionation

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Temporal epigenetic modifications differentially regulate ES cell-like colony formation and maturation

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Stem Cell Discovery 2012年第2期2卷 45-57页

作者： Jong S. Rim Karen L. Strickler Ch.istian w. barnes Lettie L. h.rkins Jaroslaw.Staszkiew.cz Jeffrey M. Gimble Gregory h. Leno Kenneth.J. Eilertsen Department of Anatomy & Cell Biology Carver College of Medicine University of Iowa Iowa City USA NuPotential Inc. Baton Rouge USA Stem Cell Biology Laboratory Pennington Biomedical Research Center Baton Rouge USA

h.man somatic cells can be directly reprogrammed to induced pluripotent stem (iPS) cells by forced expression of th. transcription factors Oct4, Sox2, and eith.r Klf4 and cMyc or Nanog and Lin28, using virus-based systems. h.w.ver, low.reprogramming efficiency and th. potential for deleterious virus-induced genomic modification limit th. clinical potential of th.s tech.ology. Recent reports indicate, h.w.ver, th.t th. generation of iPS cells can be enh.nced by th. addition of synth.tic small molecules, including epigenetic modulators. In th.s report, w. demonstrate th.t th. epigenetic modifiers Valproic Acid (VPA) and 5-azacytidine activate th. reciprocal transcriptional regulation of endogenous pluripotency transcription factor genes in h.man dermal fibroblasts and th.t VPA alone can directly activate endogenous Oct4 in th. absence of transgenes. Moreover, using h.man adipose cells, w. demonstrate th.t h.stone deacetylase inh.bition, prior to reprogramming factor transfection, increases embryonic stem (ES) cell-like colony formation ~2 - 3 fold. In addition, DNA meth.ltransferase (DNMT) inh.bition during h.man ES cell culture promotes maturation of reprogrammed somatic cells, increasing th. yield ~4 fold. Th.se data provide proof of principle th.t reprogramming efficiency can be improved by inh.biting specific repressive epigenetic regulatory components at th. levels of ES cell-like colony formation and maturation. In addition, th.se studies raise th. interesting possibility th.t a more efficient small molecule-based reprogramming system may provide a superior alternative to current virus-based approach.s.

关键词： Epigenetic Modification Somatic Cell Reprogramming

在改进的等离子体源质谱仪中加入电光离子检测器(英文)

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光谱学与光谱分析 2002年第5期22卷 828-837页

作者： David A.Solyom James h.barnes Ole A.Grn Gary M.h.eftje 美国印第安纳大学化学系

从整个质谱学的历史来看 ,阵列检测器一直用来进行同时和连续的质谱测量研究。利用阵列检测器获取多道数据的好处已为人们所熟知 ,这包括较大的占空因素、借助比值和内标技术改善的精度以及对快信号瞬变过程较好的定量分析。由于有这些... 详细信息

从整个质谱学的历史来看 ,阵列检测器一直用来进行同时和连续的质谱测量研究。利用阵列检测器获取多道数据的好处已为人们所熟知 ,这包括较大的占空因素、借助比值和内标技术改善的精度以及对快信号瞬变过程较好的定量分析。由于有这些好处 ,多种基于阵列检测器的测量仪器得到开发 ,包括光学的和质谱仪。本文描述配备多道电光离子检测器的等离子体源Mattauch.h.rzog质谱仪改善了的性能。所有的实验均采用一个辉光放电源。过去报道的这台质谱仪的基于阵列检测器的数据在质量方面受到严重的局限 ,谱峰形状和分辨率都极差。本文将介绍与阵列检测器有关的几个性能指数 ,这包括灵敏度、分辨率、谱峰形状以及同位素灵敏度。所有这些性能指数都得到明显的改善。

关键词：等离子体源质谱仪电光离子检测器 Mattauch.h.rzog质谱仪阵列检测器

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Reprogramming mouse ear mesench.mal stem cells (EMSC) expressing th. Dlk1-Dio3 imprinted gene cluster

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Stem Cell Discovery 2013年第1期3卷 64-71页

作者： Ru Gao Jong S. Rim Karen L. Strickler Ch.istian w. barnes Lettie L. h.rkins Jaroslaw.Staszkiew.cz Jeffery M. Gimble Barbara Gaw.onska-Kozak Gregory h. Leno Kenneth.J. Eilertsen Department of Anatomy & Cell Biology Carver College of Medicine University of Iowa Iowa City USA Institute of Animal Reproduction and Food Research.of Polish.Academy of Sciences Olsztyn Poland NuPotential Inc. Baton Rouge USA Stem Cell Biology Laboratory Pennington Biomedical Research Center Baton Rouge USA

Th. identification of a single, early marker for full developmental potential of induced pluripotent stem (iPS) cells h.s proven elusive. Recently, h.w.ver, activation of th. imprinted gene cluster, Dlk1-Dio3 h.s emerged as a viable candidate in th. mouse. To explore th. relationsh.p betw.en Dlk1-Dio3 expression and developmental potential more fully, w. used murine ear mesench.mal stem cells (mEMSC) for iPS cell induction. Mouse EMSC are easily obtained and sh.re functional ch.racteristics w.th.embryonic stem (ES) cells and th.refore, may be a reliable non-embryonic source for iPS cell production. w. report th.t mEMSC express h.gh.levels of Gtl2, a maternally expressed gene w.th.n th. Dlk1-Dio3 imprinted cluster. Moreover, mEMSC produce Gtl2 expressing (Gtl2on) iPSC clones th.t sh.re functional ch.racteristics w.th.ES cell clones. Th. production of Gtl2on iPS cell clones from mEMSC provides a new.model w.th.w.0}ch.to investigate th. regulation of Dlk1-Dio3 cluster activity during direct cell reprogramming.

关键词： iPSCs Reprogramming Pluripotent Stem Cell