搜索结果: 1-15 共查到“凝聚态物理学 Cu”相关记录26条 . 查询时间(0.161 秒)
中国科学院青岛能源所开发出用于CO2高效还原的Cu基双钙钛矿电催化剂(图)
钙钛矿 电催化剂 晶体
2024/3/18
利用可再生能源将CO2电催化转化为高值产物是实现“双碳”目标的重要途径。在CO2还原的众多产物中,CH4由于能量密度高、绿色清洁、存储运输基础设施完善等特点受到广泛研究关注。Cu基催化剂在电催化CO2还原制CH4方面具有广阔的应用前景,但受限于复杂的反应过程及活性结构坍塌,仍面临着CH4选择性不理想、稳定性差等问题。
采用连续切片技术重构了定向凝固Cu-10.25%Mg过共晶合金中初生Laves相Cu2Mg的三维枝晶形貌. 结果表明,Cu2Mg二次枝晶的三维生长形态在不同凝固环境中呈现“八面体”、“棱面”或“板条”状, 侧枝生长形态不对称,二维截面组织中沿生长方向不连续的枝晶实质上是枝晶二次侧枝的横断面组织, 部分沿生长方向分叉的枝晶仅是某个初生枝晶一次轴的局部, 而非二维截面组织推断出的初生枝晶分叉现象.20...
在不同塑性应变幅下对[233]共面双滑移取向Cu单晶体进行疲劳实验直至循环饱和, 然后在不同温度进行退火处理.利用SEM-ECC和TEM观察疲劳位错结构及其退火后微观结构的变化. 结果表明, 退火温度为300 ℃时, 位错结构均发生了明显的回复, 高应变幅下疲劳样品中甚至出现了部分再结晶. 在500和800 ℃退火, 所有晶体都发生了严重的再结晶, 并且有大量的退火孪晶出现. 随着塑性应变幅和累积...
Observation of the developed Cu-spin correlation in the Bi-2201 high-Tc superconductor using muon spin relaxation
Observation of the developed Cu-spin correlation muon spin relaxation
2010/11/24
A systematic muon-spin-relaxation study in Bi-2201 high-Tc cuprates has revealed for the first
time that the Cu-spin correlation (CSC) is developed at low temperatures below 2 K in a wide
range of h...
Plasmons and Interband Transitions of Ca$_{11}$Sr$_3$Cu$_{24}$O$_{41}$ investigated by Electron Energy-Loss Spectroscopy
Plasmons and Interb Transitions
2010/11/24
Electron energy-loss spectroscopy studies have been performed in order to get a deeper insight
into the electronic structure and elementary excitations of the two - leg ladder system
Ca11Sr3Cu24O41....
We performed a systematic density functional study of the adsorption of copper, silver, and gold adatoms on graphene, especially accounting for van der Waals interactions by the vdW-DF and the PBE+D2 ...
Electronic States and Superconducting Transition Temperature based on the Tomonaga-Luttinger liquid in Pr$_{2}$Ba$_{4}$Cu$_{7}$O$_{15-\delta}$
Pr2Ba4Cu7O15− first-principles calculations CuO double chain superconductivity
2010/11/17
An NQR experiment revealed superconductivity of Pr2Ba4Cu7O15− (Pr247) to be realized
on CuO double chain layers and suggests possibility of novel one-dimensional(1D) superconduc-
tivity. To c...
Oxidation resistance of graphene-coated Cu and Cu/Ni alloy
Oxidation resistance graphene-coated Cu Cu/Ni alloy
2010/11/23
The ability to protect refined metals from reactive environments is vital to many industrial and academic applications. Current solutions, however, typically introduce several negative effects, includ...
Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of Ca(x)La(1-x)Ba(1.75-x)La(0.25+x)Cu(3)O(y)
cuprate superconductors Oxygen nuclear-magnetic-resonance investigation
2010/11/18
The critical doping levels in cuprates, where the ground state changes its nature (from an an-
tiferromagnet to a spin glass to superconductor to metal), are not universal. We investigate the origin ...
在水热条件下合成了一个新的混合价配位聚合物 [Cu(en)2H2O]2•8H2O, 并对其进行了元素分析, IR, UV, TG-DSC等表征. X射线单晶衍射结果表明, 化合物属于单斜晶系, P21/c空间群, 晶胞参数a=1.88678(12) nm, b=2.30383(14) nm, c=2.61234(16) nm, α=90°, β=95.844(1)°, γ=90°, V...
应用X射线异常散射技术研究了[Ni70Co30(25A)/Cu(20A)]20多层膜的界面结构, 结果表明, 退火前后Cu/Ni70Co30和Ni70Co30/Cu界面的温度行为不同.对于制备态样品, 界面结构是非对称的, 在Cu/Ni70Co30界面, 存在一个8A厚的CuNi3过渡层和一个4A厚的NiCo层. 然而, Ni70Co30/Cu界面却不存在任何扩散. 285\textcelsius...
研究了LiNbO3∶Cr∶Cu晶体的吸收特性,发现LiNbO3∶Cr∶Cu(含0.14 wt.% Cr2O3 和 0.011 wt.% CuO)晶体存在两个明显的吸收峰,中心波长分别位于480 nm和660 nm; 随着Cr的含量逐渐减小,Cu的含量逐渐增大,短波段不存在明显吸收峰,掺Cr的含量越大,中心波长在660 nm处的吸收越大;633 nm红光虽然位于中心波长为660 nm的吸收峰内,但它...
影响KNSBN:Cu晶体中全息光栅读取时间长短的因素
2007/8/20
系统分析了掺铜钾钠铌酸锶钡(KNSBN:Cu)晶体中全息光栅的读取过程,发现全息光栅读取时间的长短与读取光的强度以及样品的温度有关,实验表明,温度为50℃读取时间约为95℃时的2倍;读取光强为1.8 mW时的读取时间为38 mW时的6倍,而且在实验范围内,读取时间和写入时间近似为线性关系.
期刊信息
篇名
Metal (Mn, Co, and Cu) Oxide Nanocrystals from Simple Formate Precursors
语种
英文
撰写或编译
撰写
作者
Xiao Sun,Ya-Wen Zhang*,Rui Si,and Chun-Hua Yan*
第一作者单位
北京大学
刊物名称
Small
页面
1(11) (2005), 1081-1086.
出版...