High-performance tin-titanium thin-film anodes prepared by magnetron co-sputtering for lithium-ion microbatteries

Journal of Solid State Electrochemistry - A new anode material of Sn-Ti thin film was successfully prepared by magnetron co-sputtering of two separate targets at the atmosphere of Ar at normal...     

Effect of mutual inductance coupling on superconducting flux qubit decoherence

In the Born-Markov approximation and two-level approximation, and using the Bloch-Redfield equation, the decoherence property of superconducting quantum circuit with a flux qubit is investigated. The influence ou decoherence of the mutual inductance coupling between the circuit components is complicated. The mutual inductance coupling between different loops will decrease the decoherence time. However, the mutual inductance coupling of the same loop, in a certain interval, will increase the decoherence time. Therefore, we can control the decoherence time by changing the mutual inductance parameters such as the strength and direction of coupling.     

Ultrasound-assisted fabrication of a novel nickel(II)-bis-pyrazolyl borate two-nuclear discrete nano-structured coordination compound

Ultrasound was used to synthesize nano-structures of [Ni(bpzB)₂]₂(1), a new two-nuclear discrete-coordination compound of divalent nickel with bis-pyrazolyl borate(bpzB). The nanostructure was characterized by scanning electron microscopy, X-ray powder diffraction, infrared, and elemental analysis. The single-crystal X-ray data show that the coordination number of Ni(II) ions is four (Ni1N₄ and Ni2N₄) with square planar geometry. The supramolecular features in these complexes are guided and controlled by weak directional intermolecular interactions. The discrete molecules interact with each other through labile interactions, creating a 3D supramolecular framework.     

Synchronized Anti-Phase and In-Phase Oscillations of Intracellular Calcium Ions in Two Coupled Hepatocytes System

We study the dynamic behaviour of two intracellufar calcium oscillators that are coupled through gap junctions both to Ca^2＋ and inositol（1,4,5）-trisphosphate （IP3）. It is found that synchronized anti-phase and in-phase oscillations of cytoplasmic cadcium coexist in parameters space. Especially, synchronized anti-phase oscillations only occur near the onset of a Hopf bifurcation point when the velocity of IP3 synthesis is increased. In addition, two kinds of coupling effects, i.e., the diffusions of Ca^2＋ and IP3 among cells on synchronous behaviour, are considered. We fnd that small coupling of Ca^2＋ and large coupling of IP3 facilitate the emergence of synchronized anti-phase oscillations. However, the result is contrary for the synchronized in-phase case. Our findings may provide a qualitative understanding about the mechanism of synchronous behaviour of intercellular calcium signalling.     

Amplified Signal Response by Neuronal Diversity on Complex Networks

The effect of diversity on dynamics of coupled FitzHugh-Nagumo neurons on complex networks is numerically investigated, where each neuron is subjected to an external subthreshold signal. With the diversity the network is a mixture of excitable and oscillatory neurons, and the diversity is determined by the variance of the system＇s parameter. The complex network is constructed by randomly adding long-range connections （shortcuts） on a nearest-neighbouring coupled one-dimensional chain. Numerical results show that external signals are maximally magnified at an intermediate value of the diversity, as in the case of well-known stochastic resonance, burthermore, the effects of the number of shortcuts and coupled strength on the diversity-induced phenomena are also discussed. These findings exhibit that the diversity may play a constructive role in response to external signal, and highlight the importance of the diversity on such complex networks.     

克尔介质中双模纠缠相干光与贝尔态原子相互作用系统的光子统计特性

运用全量子理论并结合数值计算方法,研究了克尔介质腔中处于贝尔态的两个全同二能级纠缠原子与双模纠缠相干光场相互作用系统的光子统计特性。讨论了双原子体系的初态、初始光场的平均光子数、双模纠缠相干光场的纠缠程度以及克尔介质与双模光场的耦合强度对光子统计特性的影响。结果表明:忽略克尔介质的作用时,只有当双原子体系的初态为0β1〉或1β1〉时,在一定的条件下才可出现光子的反聚束效应,而当双原子体系的初态为β00〉、1β0〉时,光场在其演化过程中不出现光子的反聚束效应。而当考虑克尔介质的作用时,四种初态下光场演化过程中均有可能出现光子的反聚束效应。光子的反聚束效应出现的次数、时间和深度极其敏感地依赖于初始光场的平均光子数和克尔介质与双模光场的耦合强度,同时也受到双模纠缠光场的纠缠程度的影响。     

新型镉(Ⅱ)配合物荧光探针的合成及性能

以8-氨基喹啉、1,5-萘二磺酸根为配体,NaN3为pH调节剂,与Cd(NO3)2通过水热反应,合成了一个新的一维链状镉配合物:[Cd(8-aql)2(1,5-nd)]2·H2O(1)(8-aql=8-氨基喹啉,1,5-nd=1,5-萘二磺酸根),并对其进行了元素分析、红外光谱和X-射线单晶衍射表征.配合物1属于单斜晶...     

Co3O4纳米花的合成及其磁性

通过水热和热处理的方法，制备了产物Co3O4纳米花. 用X射线粉末衍射、场发射扫锚电镜、透射电镜和红外光谱等手段对产物进行了表征. 结果表明，产物纳米花是由大量的Co3O4纳米须组成，纳 米须的直径为20?40 nm，长度为100?500 nm，具有纳米孔结构，比表面积约为34.61 m2/g. 磁性测量表明，在零场冷却条件下，产物主要表现为反铁磁性；在加场冷却条件下，闭锁温度约为34K时，产物主要表现为铁磁性．     

TBP对部分皂化的DMHPA—正庚烷体系及萃取稀土有机相的影响

研究了部分皂化的二（１甲基庚基）磷酸（ＤＭＨＰＡ）磷酸三丁酯（ＴＢＰ）—正庚烷（Ｃ７Ｈ１６）体系及萃取稀土有机相的聚集状态。结果表明，ＴＢＰ可以扩大ＤＭＨＰＡＣ７Ｈ１６Ｈ２Ｏ微乳状液形成的区间，并且对萃取有机相的存在状态及水的行为有明显的影响，在一定的条件下有凝胶形成。ＦＴＩＲ光谱分析表明，该类凝胶中ＤＭＨＰＡ和ＴＢＰ与稀土离子以多种形式配位，ＴＢＰ与ＤＭＨＰＡ及水的氢键结合对凝胶网状结构的形成也起了一定的作用。     

Photoinduced chirality in achiral liquid crystalline azobenzene polymers containing different polar side groups

Circular dichroism (CD) was induced in the films of two achiral liquid crystalline polymers, poly[(4′-(6-(methacryloyloxy)hexyl)oxy)-(4-X)azobenzene] (PM6X, X = C and N for cyano and nitro, respectively), by irradiation with one handed circularly polarized light (CPL) at 442 nm. The CD and UV spectra of the polymeric films suggest that left-CPL induces a left helical structure and right-CPL reverses the resulting structure into a right helix. For PM6C, the photoinduced CD values of the nematic film are much higher than in the casting and isotropic film. The photoinduced chirality of PM6C films is higher than PM6N due to a higher polarity of nitro groups in PM6N. The PM6N’s CD intensity around 450 nm is increased with the irradiation time of linearly polarized light (LPL) followed by left-CPL irradiation. The correlation between azobenzene chromophores and circularly polarized light will be discussed in the paper.