提高电子注入的固态阴极射线发光的研究

设计了SiO₂与电极间加入ZnS的复合加速层结构，进一步说明靠电子注入的增强来扩大初电子源.同时，在电子发生倍增前后的电压下，对比了单层和夹层结构的不同加速层的发光性能.得到在低压直流下单侧复合加速层器件的发光优于单层SiO₂加速层器件而劣于单层ZnS器件；在高压交流下复合加速层表现出明显的优势，在复合加速层中，ZnS不仅对电子有加速作用，而且对增强电子注入贡献很大，同时ZnS和SiO₂/ZnS界面还提供了初电子源.另外，与SiO _{关键词： 电致发光 复合加速层 过热电子 固态阴极射线}     

类铍离子磁四极M2 2s2 1S0-2s2p 3 P2(Z=10-103)禁戒跃迁

利用全相对论多组态:Dirac-Fock方法系统地计算了高离化类铍离子的磁四极M2 2s2 1S0-2s2p3P2 (Z=10-103)自旋禁戒跃迁的能级间隔、跃迁概率和振子强度,计算中考虑了重要核的有限体积效应,Breit修正和QED修正,所得结果和最近的实验数据以及理论值进行了比较,结果表明:高原子序数的高电荷离子(Z≥70)磁四极M2自旋禁戒跃迁几乎可以和中性原子的光学允许跃迁相比拟,不仅在天体等离子体中,在ICF和MCF高温激光等离子体中,磁四极自旋禁戒跃迁和其他自旋禁戒跃迁(磁偶极、电四极)一样不容忽视,在双电子复合、不透明度、自由程等理论计算中应该考虑其影响.     

Ab initio structure study from in-house powder diffraction of a novel ZnS(EN)0.5 structure with layered wurtzite ZnS fragment

The solvothermal reaction of elemental zinc with sulfur in ethylenediamine (en) as solvent yields [ZnS-0.5(NH2CH2CH2NH2)], 1, an unprecedented ethylenediamine pillared ZnS layered compound, containing two dimensional (2-D) boat-type 6-membered rings, which was characterized by ab initio structure solution from powder diffraction data (SDPD).     

TG-MS analysis on the degradation behavior and mechanism of amorphous SiCxOy phase in polyaluminocarbosilane-derived Si-Al-C-O fiber

Journal of Thermal Analysis and Calorimetry - The degradation of SiCxOy phase is a crucial step during the conversion of polyaluminocarbosilane-derived amorphous Si-Al-C-O fiber into highly...     

Rational design of Ru species on N-doped graphene promoting water dissociation for boosting hydrogen evolution reaction

In this study,the morphological distribution of Ru on nitrogen-doped graphene(NG)could be rationally regulated via modulating the combination mode between Ru precursor and the zeolite imidazolate framework-8(ZIF-8).The cation exchange and host-guest strategies respectively resulted in two different combination modes between Ru precursor and ZIF-8 anchored on graphene.Following pyrolysis of the above precursors,Ru single-atom sites(SASs)with and without Ru nanoparticles(NPs)were formed selectively on NG(denoted as Ru SASs+NPs/NG and Ru SASs/NG,respectively).Ru SASs+NPs/NG exhibited excellent hydrogen evolution reaction(HER)performance in alkaline solutions(η₁₀=12 mV,12.57 A mg^-1_Ru at 100 mV),which is much better than Ru SASs/NG.The experimental and theoretical study revealed that Ru SASs could adsorb hydrogen with optimal adsorption strength,while Ru NPs could lower the barrier of water molecule dissociation,and thus Ru SASs and Ru NPs could synergistically promote the catalytic performance of HER in alkaline solutions.     

Study on the α-ray radiolysis product of hydroxysemicarbazide

Journal of Radioanalytical and Nuclear Chemistry - Hydroxysemicarbazide (HSC) as a novel salt-free organic reductant has the ability to accomplish the reduction of Pu(IV) fast in the nuclear fuel...     

Dual Effects of Interfacial Interaction and Geometric Constraints on Structural Formation of Poly(butylene terephthalate) Nanorods

Chinese Journal of Polymer Science - When the size of the material is smaller than the size of the molecular chain, new nanostructures can be formed by crystallizing polymers in nanoporous alumina....     

WC-Ni金属陶瓷高温摩擦学性能的研究

本文考察了WC—Ni金属陶瓷的组成,显微组织和硬度及摩擦学条件等对其高温摩擦学性能的影响,并且发现WC-Ni材料在高温下摩擦时,表面生成了含氧化合物NiWO_4和WO_3,故其摩擦磨损性能比常温下的好。试验结果表明,NiWO_4有高温减摩作用,WO_3有抗磨作用;WC-Ni材料中的Ni含量为40％(wt)时,其在载荷39.2N、速度1m/s、温度600℃下摩擦形成的表面膜比较均匀连续,摩擦系数最低。     

Two recursive inequalities for crossing numbers of graphs

In this paper, two recursive inequalities for crossing numbers of graphs are given by using basic counting method. As their applications, the crossing numbers of K _1,3,n and K _4,n \ e are determined, respectively.