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High-mobility two-dimensional electron gases at oxide interfaces:Origin and opportunities

Chinese Physics B 2013年第11期22卷 1-11页

作者：陈允忠 Nini Pryds 孙继荣沈保根 sфren linderoth Department of Energy Conversion and storage Technical University of Denmark Ris Campus Beijing National Laboratory for Condensed Matter Physics State Key Laboratory for Magnetism Institute of Physics Chinese Academy of Sciences

Our recent experimental work on metallic and insulating interfaces controlled by interfacial redox reactions in srTiO3-based heterostructures is reviewed along with a more general background of two-dimensional electron gas （2DEG） at oxide interfaces. Due to the presence of oxygen vacancies at the srTiO3 surface, metallic conduction can be created at room temperature in perovskite-type interfaces when the overlayer oxide ABO3 has Al, Ti, Zr, or Hf elements at the B sites. Furthermore, relying on interface-stabilized oxygen vacancies, we have created a new type of 2DEG at the heterointerface between srTiO3 and a spinel γ-Al2O3 epitaxial film with compatible oxygen ion sublattices. This 2DEG exhibits an electron mobility exceeding 100000 cm2·V-1·s-1, more than one order of magnitude higher than those of hitherto investigated perovskite-type interfaces. Our findings pave the way for the design of high-mobility all-oxide electronic devices and open a route toward the studies of mesoscopic physics with complex oxides.

关键词： oxide interfaces two-dimensional electron gas (2DEG) srTiO3 oxygen vacancies

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sTM Manipulation of Molecular Moulds on Metal surfaces

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Nano Research 2009年第3期2卷 254-259页

作者： Miao Yu Wei Xu Youness Benjalal Regis Barattin Erik Lægsgaard Ivan stensgaard Mohamed Hliwa Xavier Bouju AndréGourdon Christian Joachim Trolle R.linderoth Flemming Besenbacher Interdisciplinary Nanoscience Center(iNANO)and Department of Physics and Astronomy Aarhus UniversityNy Munkegade8000 Aarhus CDenmark Nanoscience group CEMES-CNRS29 rue Jeanne Marvig31055 ToulouseFrance Facultédes sciences Ben Mʼsik UniversitéHassan II-MohammédiaBP 7955Sidi OthmanCasablancaMorocco

Molecular Landers are a class of compounds containing an aromatic board as well as bulky side groups which upon adsorption of the molecule on a surface may lift the molecular board away from the *** molecular Landers have extensively been studied as model systems for nanomachines and the formation of molecular wires,as well as for their function as“molecular moulds”,i.e.,acting as templates by accommodating metal atoms underneath their aromatic ***,we investigate the adsorption of a novel Lander molecule 1,4-bis(4-(2,4-diaminotriazine)phenyl)-2,3,5,6-tetrakis(4-tert-butylphenyl)benzene(DAT,C_(64)H_(68)N_(10))on Cu(110)and Au(111)surfaces under ultrahigh vacuum(UHV)*** means of scanning tunneling microscopy(sTM)imaging and manipulation,we characterize the morphology and binding geometries of DAT molecules at terraces and step *** the Cu(110)surface,various contact configurations of individual DAT Landers were formed at the step edges in a controlled manner,steered by sTM manipulation,including lateral translation,rotation,and pushing molecules to an upper *** diffusion barrier of single DAT molecules on Au(111)is considerably smaller than on Cu(110).The DAT Lander is specially designed with diamino-triazine side groups making it suitable for future studies of molecular self-assembly by hydrogen-bonding *** results presented here are an important guide to the choice of substrate for future studies using this compound.

关键词： scanning tunneling microscopy(sTM) molecular Landers adsorption sTM manipulation molecular moulding

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Exploring the Transferability of Large supramolecular Assemblies to the Vacuum-solid Interface

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Nano Research 2009年第7期2卷 535-542页

作者： Wei Xu Mingdong Dong Henkjan Gersen socorro Vázquez-Campos Xavier Bouju Erik Lægsgaard Ivan stensgaard Mercedes Crego-Calama David NReinhoudt Trolle R.linderoth Flemming Besenbacher Interdisciplinary Nanoscience Center(iNANO)and Department of Physics and Astronomy Aarhus UniversityNy Munkegade8000 Aarhus CDenmark Laboratory of supramolecular Chemistry and Technology Materials Science and Technology of PolymersMESA+Institute for NanotechnologyUniversity of TwenteP.O.Box 2177500 AE EnschedeThe Netherlands Nanoscience group CEMES-CNRS29 rue Jeanne Marvig31055 ToulouseFrance Current address:Departments of Chemistry and Physics The Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA Current address:Nanophysics and soft Matter Group Department of PhysicsUniversity of BristolTyndall AvenueBS81TL BristolUK

We present an interplay of high-resolution scanning tunneling microscopy imaging and the corresponding theoretical calculations based on elastic scattering quantum chemistry techniques of the adsorption of a gold-functionalized rosette assembly and its building blocks on a Au(111)surface with the goal of exploring how to fabricate functional 3-D molecular nanostructures on *** supramolecular rosette assembly stabilized by multiple hydrogen bonds has been sublimed onto the Au(111)surface under ultra-high vacuum conditions;the resulting surface nanostructures are distinctly different from those formed by the individual molecular building blocks of the rosette assembly,suggesting that the assembly itself can be transferred intact to the surface by in situ thermal *** unanticipated result will open up new perspectives for growth of complex 3-D supramolecular nanostructures at the vacuum-solid interface.

关键词： self-assembly surface nanostructures scanning tunneling microscopy supramolecular assembly hydrogen bonding

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脊髓刺激引起下肢血管扩张的效应及机理研究

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中国中西医结合外科杂志 2008年第5期14卷 510-512页

作者：高杰吴明远秦朝 Rbert Foreman Bengt linderoth 黑龙江中医药大学附属第一医院周围血管病科哈尔滨150040 Department of Physiology Unversity of Oklahoma Health Sciences Center Department of Clinical Neuroscience Section of NeurosurgeryKae-olinska Institute

脊髓刺激(spinal cord stimulation,sCs)是通过植入电极从而在不同的脊髓节段进行的电刺激方法,shealy在1967年首次使用脊髓刺激治疗疼痛病人。目前脊髓刺激已经被广泛使用治疗各种与疼痛有关系的疾病,也常用于治疗周围血管性疾病导致... 详细信息

脊髓刺激(spinal cord stimulation,sCs)是通过植入电极从而在不同的脊髓节段进行的电刺激方法,shealy在1967年首次使用脊髓刺激治疗疼痛病人。目前脊髓刺激已经被广泛使用治疗各种与疼痛有关系的疾病,也常用于治疗周围血管性疾病导致的缺血性疼痛。临床和基础研究显示,脊髓刺激能够通过调节神经系统来增加缺血性区域血流或重新分布局部血流。脊髓刺激治疗缺血性疼痛的临床疗效在于减轻疼痛、减少梗塞的形成、促进溃疡的愈合、减少氧需求和增加跛行距离。有文献报道,连续应用1年,80%的病人出现有益的影响;连续5年,60%的病人仍有很好的疗效[1]。目前在全球每年有5万以上病例进行脊髓刺激治疗,总有效率约80%。脊髓刺激的机理主要基于Melzack和Wall在1965年发表的脊髓背角阀门学说,此学说部分解释了脊髓刺激诱导疼痛减轻的机制。然而,近来研究的新理论能够更完善的进一步阐述调节血管舒缩的机制。本文总结了脊髓刺激影响在下肢和足部血液循环调节的的各种机制。1脊髓刺激对下肢和足部周围血管系统的影响1.1背景很多肢体缺血性疾病是周围动脉闭塞性疾病(peripheral arterial occlusive ...

关键词：脊髓刺激下肢血管扩张效应机理

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脊髓刺激引起下肢血管扩张的效应及机理研究

脊髓刺激引起下肢血管扩张的效应及机理研究

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第十四次全国中西医结合疡科学术交流会

作者：高杰吴明远秦朝 Foreman,R.D. Bengt linderoth 黑龙江中医药大学附属第一医院周围血管病科 Department of Physiology Unversity of Oklahoma Health Sciences Center Department of Clinical Neuroscience Section of NeurosurgeryKaeolinska InstituteStockholmSweden

关键词：脊髓刺激下肢血管扩张交感神经机制血管闭塞性疾病临床治疗

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