检索结果-南通市图书馆

甲烷浓度对CvD金刚石薄膜晶体学生长过程的影响

在线全文

学校读者我要写书评

暂无评论

无机材料学报 2007年第3期22卷 570-576页

作者：朱宏喜毛卫民冯惠平吕反修 vlasov I I Ralchenko v G khomich a v 北京科技大学材料学系 General Physics Institute Russia Academy of SciencesMoscow 119991 Russia Institute of Radio Engineering & Electronics Russia Academy of SciencesFryazino 141190 Russia

采用X射线衍射技术、电子背散射衍射技术和扫描电镜分别观察了不同甲烷浓度条件下沉积的CvD自支撑金刚石薄膜的宏观织构、微区晶界分布和表面形貌．研究了金刚石晶体{100}面和{111}面生长的晶体学过程．研究表明,{100}面通过吸附活性基... 详细信息

采用X射线衍射技术、电子背散射衍射技术和扫描电镜分别观察了不同甲烷浓度条件下沉积的CvD自支撑金刚石薄膜的宏观织构、微区晶界分布和表面形貌．研究了金刚石晶体{100}面和{111}面生长的晶体学过程．研究表明,{100}面通过吸附活性基团CH2 2-,而{111}面通过交替吸附活性基团CH3 -和CH3-后脱氢堆积碳原子．低甲烷浓度时,{111}面表面能低于{100}面,使{111}面生长略快于{100}面．甲烷浓度升高,动力学作用增强使{100}面生长明显快于{111}面,使金刚石薄膜产生{100}纤维织构;同时显露的{100}面平行于薄膜表面,竞争生长使位于晶体侧面的{111}面由于相互覆盖而减小,形成了不同于单晶体自由生长的薄膜表面形貌组织．

关键词：金刚石薄膜织构晶体生长表面形貌组织

Nitrogen-Doped Chemical vapour Deposited Diamond： a New Material for Room-Temperature Solid State Maser

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2007年第7期24卷 2088-2090页

作者： N. A. Poklonski N. M. Lapchuk A. v. khomich 吕反修唐伟忠 v. G. Ralchenko I. I. Wlasov M. v. Chukichev Sambuu Munkhtsetseg Department of Physics Belarusian State University Minsk 220030 Belarus v. A. Kotelnikov Institute of Radio Engineering and Electronics Russia Academy of Sciences Fryazino 141191 Russia School of Material Science and Engineering University of Science and Technology Beijing Beijing 100083 A. M. Prokhorov General Physics Institute Russia Academy of Sciences Moscow 119991 Russia Department of Physics M. V. Lomonosov Moscow State University Moscow 119899 Russia National University of Mongolia Ulaanbaatar 210646 Mongolia

Electron spin resonance （ESR） in polycrystalline diamond films grown by dc arc-jet and microwave plasma chemical vapour deposition is studied. The films with nitrogen impurity concentration up to 8 × 10^18 cm^-3 are also characterized by Raman, cathodoluminescence and optical absorption spectra. The ESR signal from P1 centre with g-factor of 2.0024 （nitrogen impurity atom occupying C site in diamond lattice） is found to exhibit an inversion with increasing the microwave power in an H102 resonator. The spin inversion effect could be of interest for further consideration of N-doped diamonds as a medium for masers operated at room temperature.

关键词： ELECTRON-SPIN RESONANCE SYNTHETIC DIAMOND SINGLE-CRYSTAL EPR SIGNAL FILMS CATHODOLUMINESCENCE DEFECTS CvD MORPHOLOGY ENERGY

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CvD金刚石薄膜孪晶形成的原子机理分析

物理学报 2007年第7期56卷 4049-4055页

作者：朱宏喜毛卫民冯惠平吕反修 I.I.vlasov v.G.Ralchenko A.v.khomich 北京科技大学材料学系北京100083 General Physics Institute Russia Academy of Sciences Institute of Radio Engineering & Electronics Russia Academy of Sciences

采用X射线衍射技术、电子背散射衍射技术和扫描电镜分别观察了不同甲烷浓度条件下沉积的CvD自支撑金刚石薄膜的宏观织构、晶界分布和表面形貌.研究了一阶孪晶在金刚石晶体{111}面生长的原子堆垛过程.结果表明,由于一阶孪晶〈111〉60°... 详细信息

采用X射线衍射技术、电子背散射衍射技术和扫描电镜分别观察了不同甲烷浓度条件下沉积的CvD自支撑金刚石薄膜的宏观织构、晶界分布和表面形貌.研究了一阶孪晶在金刚石晶体{111}面生长的原子堆垛过程.结果表明,由于一阶孪晶〈111〉60°的取向差关系以及{111}面的原子堆垛结构,使{111}面上容易借助碳原子的偏转沉积产生一阶孪晶.低甲烷浓度时,碳原子倾向于在表面能较低的{111}面沉积,为孪晶的形成提供了便利,且高频率孪晶使薄膜织构强度减弱.甲烷浓度升高使生长激活能较小的{001}面成为主要前沿生长面,因而只有〈001〉晶向平行薄膜法向的晶粒能够不断长大,因此孪晶形核概率明显减小.另外,在薄膜中发现二阶孪晶,并对二阶孪晶的形成进行了分析.

关键词：金刚石薄膜孪晶原子机理取向差

Deep-seated geodynamics and position of Platinum-bearing basite-ultrabasite massifs of southeast Russia

在线全文

学校读者我要写书评

暂无评论

Global Geology 2012年第3期15卷 204-209页

作者： khomich v.G. Boriskina N.G. Far East Geological Institute of FEB of Russian Academy of Sciences

In the southeast part of the North-Asian craton, several ring basite-uhrabasite plutons have been rec- ognized, with which the commercial placers of platinoids associate. Analysis of the known geodynamic models of the region formation and materials of seismic tomography showed that the subduction processes, that actively manifested themselves in the Asia-Pacific convergence zone in Mesozoic, were responsible for initiation of the stagnated oceanic slab. Its NE and SW boundaries appear to coincide with the transform faults. Projection of the transform fault, bordering the above mentioned slab in the NEN, coincides with the Konder-Feklistovsky metal- logenic belt distinguished earlier and its Aldan （Inaglinsky） member. Higher platinum content of ring massifs of the belt is controlled by the influence of the lower mantle derivatives on the ascending upper mantle plumes.

关键词： southeast Russia mantle plumes Platinum-bearing ring massifs

Amur Gold-Bearing Belt: Geotectonic Position and Perspectives for Revealing New Deposits of Precious Metals

在线全文

学校读者我要写书评

暂无评论

Global Geology 1999年第2期4卷 179-186页

作者： khomich v.G. and Utkin v.P. (Far East Geological Institute of FEB RAS vladivostok, 690022, Russia )

The ore-bearing belts, specialized for precious metals, are substantia ted to exist in the south Far East of Russia. The longest of which is the Amursk y gold-bearing belt extended from the Amur River mouth to the Ussuri River lowe r course and further to the southwest on China territory, probably, to the Sungar i River head. The fact that we have distinguished the Amursky and other gold-be a ring belts, make it possible to reevaluate the perspectives of the South Far Eas t of Russia and North-East China for new deposits of precious metals.

关键词： gold-bearing belt geotectonic position perspective Am ur

俄罗斯远东岗仁地体金铜矿床地质、地球化学特征及其LA-ICP-MS锆石U-Pb年龄

在线全文

学校读者我要写书评

暂无评论

地质通报 2015年第4期34卷 618-629页

作者：张国宾杨言辰 khomich v G 叶松青李海洋王林郝明王庆双吉林大学地球科学学院吉林长春130061 俄罗斯科学院远东分院远东地质所俄罗斯海参威690022

岗仁地体位于额尔古纳超地体北部边缘,蒙古—鄂霍茨克构造带南部,该区分布着大量的大型、超大型金矿床,这些矿床在成因上与中酸性侵入岩和浅成次火山岩关系密切。岩石地球化学研究表明,花岗闪长岩-闪长岩组合明显富集大离子亲石元素、... 详细信息

岗仁地体位于额尔古纳超地体北部边缘,蒙古—鄂霍茨克构造带南部,该区分布着大量的大型、超大型金矿床,这些矿床在成因上与中酸性侵入岩和浅成次火山岩关系密切。岩石地球化学研究表明,花岗闪长岩-闪长岩组合明显富集大离子亲石元素、不相容元素和轻稀土元素,亏损高场强元素和重稀土元素。球粒陨石标准化稀土配分模式为轻稀土元素富集、重稀土元素亏损的右倾型,具有微弱的负Eu异常或基本无Eu异常,无Ce异常,元素地球化学性质反映出花岗闪长岩-闪长岩组岩浆具有壳幔混合的特征,且形成于大陆边缘的火山弧环境。LA-ICP-MS锆石U-Pb测年结果揭示,皮奥涅尔金银矿床含矿闪长玢岩的206Pb/238U年龄加权平均值为113.8±2.0Ma,博尔古利坎铜金钼矿床赋矿二长闪长斑岩的206Pb/238U年龄加权平均值为112.7±2.8Ma,与皮奥涅尔金银矿床和博尔古利坎铜金钼矿床成矿有关的奥列佳花岗闪长岩体的年龄分别为117.2±1.3Ma和117.0±3.6Ma。由此可知,皮奥涅尔金银矿床和博尔古利坎铜金钼矿床形成于燕山早期,与中国黑龙江地区三道湾子金矿、东安金矿等金矿床形成时代一致。

关键词：地质特征地球化学特征 LA-ICP-MS锆石U-Pb年龄岗仁俄罗斯

B-L model with D_(4)×Z_(4)×Z_(2)symmetry for fermion mass hierarchies and mixings

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第6期48卷 11-30页

作者： v.v.vien Department of Physics Tay Nguyen UniversityDaklakVietnam

We constructed a gauge B-L model with D_(4)×Z_(4)×Z_(2)symmetry to explain the quark and lepton mass hierarchies and their mixings with realistic CP phases via the type-I seesaw *** quark mases,three quark mixing angles,and the CP phase in the quark sector take the central values whereas Yukawa couplings in the quark sector are diluted in a range of difference of three orders of magnitude by the perturbation theory at the first *** the neutrino sector,a small neutrino mass is achieved by the type-I seesaw *** inverted and normal neutrino mass hierarchies are consistent with the experimental *** predicted sum of neutrino masses for normal and inverted hierarchies,the effective neutrino masses,and the Dirac CP phase are also consistent with recently reported limits.

关键词： flavor symmetries quark and lepton masses and mixing extensions of electroweak gauge sector neutrino mass and mixing non-standard-model neutrinos right-handed neutrinos D4 discrete symmetry

Kinetics of dense plasma in the field of short laser pulses:A generalized approach

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第5期9卷 87-92页

作者： v.A.Astapenko v.S.Lisitsa Moscow Institute of Physics and Technology(National Research University) Institutskii per.9141701 DolgoprudnyiRussia National Research Centre“Kurchatov Institute ”123182 MoscowRussia National Research Nuclear University MEPhI 115409 MoscowRussia

A generalized kinetic model of atomic level populations in an optically dense plasma excited by laser pulses of arbitrary duration is formulated and *** model is based on a nonstationary expression for the probability of excitation of an atomic transition and takes into account the effects of laser pulse penetration into an optically dense medium.A universal formula for the excitation probability as a function of time and propagation length is derived and applied to the case of a Lorentzian spectral profile of an atomic transition excited by a laser pulse with a Gaussian *** features of nonstationary excitation probabilities are presented for different optical depths of the plasma,laser pulse durations,and carrier *** formulas derived here will be useful for the description of atomic populations excited by laser pulses under realistic conditions of dense plasmas.

关键词： laser excitation excited

Active and passive modulation of solar light transmittance in a uniquely multifunctional dual-band single molecule for smart window applications

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第1期88卷 293-305,I0007页

作者： Pooja v.Chavan Pramod v.Rathod Joohyung Lee Sergei v.Kostjuk Hern Kim Department of Energy Science and Technology Environmental Waste Recycle InstituteMyongji UniversityYonginGyeonggi-do 17058Republic of Korea Department of Chemical Engineering Myongji UniversityYonginGyeonggi-do 17058Republic of Korea Research Institute for Physical Chemical Problems of the Belarusian State University MinskBelarus

Functional materials may change color by heat and electricity separately or simultaneously in smart *** materials have not only demonstrated remarkable potential in the modulation of solar radiation but are also leading to the development of indoor environments that are more comfortable and conducive to improving individuals'quality of ***,dual-responsive materials have not received ample research attention due to economic and technological *** a consequence,the broader utilization of smart windows faces *** address this new generational multistimulus responsive chromic materials,our group has adopted a developmental strategy to create a poly(NIPAM)n-Hv as a switchable material by anchoring active viologen(Hv)onto a phase-changing poly(NIPAM)n-based smart material for better utility and *** constructed smart windows facilitate individualistic reversible switching,from a highly transparent state to an opaque state(thermochromic)and a red state(electrochromic),as well as facilitate a simultaneous dual-stimuli response reversible switching from a clear transparent state to a fully opaque(thermochromic)and orange(electrochromic)*** privacy can be attained in smart windows designed for exclusive settings by achieving zero *** unique chromic mode operates independently and modulates visible and near-infrared(NIR)light in a distinct ***,these smart windows with thermal and electric dual-stimuli responsiveness demonstrate remarkable heat regulation capabilities,rendering them highly attractive for applications in building facades,energy harvesting,privacy protection,and color display.

关键词： Smart windows Thermochromism Electrochromism Energy saving Dual-responsive material