Al70Co15Tb5Ni10合金中准晶相关相的高压研究

 使用静高压熔态淬火方法，在Al₇₀Co₁₅Tb₅Ni₁₀合金中截获到迄今为止晶胞参数最大的两个十次准晶的Penrose-Tiling相关相。其晶胞参数分别为：简单正交晶体a=6.11 nm，b=0.4 nm，c=8.4 nm；底心正交晶体a=6.11 nm，b=0.4 nm，c=8.4 nm。其晶体结构和晶胞参数与目前理论上的预言基本吻合。     

Aggregation-dependence of Optical Properties and Fluorescence Quenching of a Water-soluble Poly（phenylene ethynylene）

In recent years, water-soluble conjugated polymers have been attained much attention as the optical platform in fluorescent chemical and biological sensors1. In comparison to the small molecule counterparts, conjugated polymers exhibit signal amplificatio…     

高压截获十次准晶相关晶体相和纳米级超微粒

 对Al₇₀Co₁₅Ni₁₀Tb₅合金进行了静高压（7.0 GPa）熔态（1 700 ℃）淬火（冷却速率10²⁰ C/s）处理，首次观察到一个新十次准晶相关晶体相。该相属底心正交晶体，晶胞参数为a=2.28 nm、b＝1.60 nm、c＝5.46 nm。通过高分辨像分析，给出了它的二维点阵模型。同时在样品中发现了尺寸均匀的纳米级非晶超微粒形成，超微粒为球形，直径30~40 nm。     

高压下Zr60Ni20Al20金属玻璃形成过程的研究

 本文报道用高压淬火的方法制备出了Zr₆₀Ni₂₀Al₂₀大块金属玻璃。以经典成核理论为依据，估计了压力对晶核成长速度的影响，在高压下过冷熔体的晶体生长速度比常压下的晶体生长速度低几个数量级，这说明高压淬火之所以有利于金属玻璃的形成，主要是因为压力抑制了过冷熔体内的晶体生长过程。     

e+e－湮没中不同味道夸克喷注带电粒子多重数差别

利用“夸克产生律”与“夸克组合律”计算了e⁺e^－湮没中重夸克喷注事例的带电粒子多重数,结果与实验符合.并与轻夸克喷注事例及平均夸克味道喷注事例的多重数做了比较.     

热阻层对低温淬火过程的影响研究

通过在铝合金棒表面制备阳极氧化热阻层和Teflon热阻层,分别对电抛光、阳极氧化和涂覆Teflon层等表面在液氮浴中的低温淬火过程进行实验研究,通过对传热反问题求解分析,研究了热阻层对低温淬火过程的影响。结果表明,热阻层能显著提升莱登佛罗斯特点的温度和临界热流密度,使整体的换热能力提高,从而加速了低温冷却过程。     

Variation of Optical Quenching of Photoconductivity with Resistivity in Unintentional Doped GaN

The optical quenching of photoconduetivity under dual illumination in GaN samples with different resistivity is investigated to reveal the variation of deep levels. The samples are grown by metal organic chemical vapour deposition without intentional doping. Quenching bands centered at 1.35 eV, 1.55 eV, 1.98eV, and 2.60 eV are observed. It is found that the 1.98eV quenching band is dominated in all the samples and the 2.60eV band is observed only in the high-resistivity samples. The possible defect levels responsible for the quenching bands and the origin of different quenching behaviour at 2.60eV are discussed. It is suggested that the defect level responsible for quenching at 2.60 eV plays an important role for the enhancement of resistivity.     

反应-扩散方程的熄灭问题

In this article, we consider a reaction-diffusion differential equation with initial value conditions u(x, 0) = 0 on [0, a] and boundary condition ux + αiu = 0 on Γ= {0, a} × (0, T), and the quenching happens for the reaction-diffusion equation.     

用荧光猝灭和荧光加强两种理论研究头孢类药物与白蛋白的作用

应用荧光加强和荧光猝灭两种理论公式，对七种头孢类抗菌药物与人血清和牛血清白蛋白的作用作进行了对比研究，对药物与白蛋白的结合特点和通常的表征量：解离常数、猝灭常数、猝灭效率、能量转移效率、给体-受体作用距离等，进行了深入地分析。     

聚偏氟乙烯β相结晶研究

用淬火、熔体拉伸和与其它聚合物共混的方法直接制得了聚偏氟乙烯(PVF_2)β相结晶.并深入地研究了淬火、熔体拉伸和共混物组分对PVF_2β相结晶的影响.