A novel signal amplification strategy of an electrochemical immunosensor for human chorionic gonadotropin, based on nanocomposites of multi-walled carbon nanotubes–ionic liquid and nanoporous Pd
Iodine‐Promoted Synthesis of Structurally Ordered AlPd
5
摘要:
AbstractThe boundary conditions and scope of catalytically stimulated synthesis of ordered intermetallics from solid metals are elucidated. The method is applied to the preparation of AlPd5. Its crystal structure has been determined by means of x‐ray powder diffractometry. AlPd5 forms a structurally unmatched ordered variant of the cubic close‐packing of spheres. Above 900 K AlPd5 is merged in the fcc boundary solid solution AlxPd1−x by a first order phase transition. The particular arrangement of the minority component Al and the associated structural distortions are analysed with regard to chemical bonding against the background of the enthalpy‐driven disorder‐order transition.
Phase formation by ion beam mixing in Ni/Al, Pd/Al, and Pt/Al bilayers
作者:M. Nastasi、L. S. Hung、J. W. Mayer
DOI:10.1063/1.94511
日期:1983.11
Ionbeam and thermal reactions in thin‐film bilayers of Ni/Al, Pd/Al, and Pt/Al have been investigated using electron diffraction and Rutherford backscattering (RBS). Ionmixing was performed with 600‐keV Xe ions at room temperature with doses ranging between 0.25 to 12×1015 ions/cm2. The compositions of the ion induced crystalline phases, NiAl and PdAl, differ both from the overall atomic compositions
New members of the tetragonal RE14T3Al3 (RE = Sc, Y, Dy–Tm, Lu; T = Cu, Rh, Pd) series
作者:Frank Stegemann、Oliver Janka
DOI:10.1007/s00706-019-02434-2
日期:2019.7
AbstractThe rare-earth metal-rich RE14T3Al3 series (RE = Y, Gd–Tm, Lu) was extended to the transition metals T = Cu, Rh, and Pd. All compounds have been prepared by arc-melting the rare-earth elements with appropriate amounts of TAl precursors. The compounds crystallize in the tetragonal Gd14Co3In2.7-type structure with space group P42/nmc. Two structures (Y14Rh2.97(1)Al3.03(1): a = 952.99(4) pm, c = 2292
摘要富含稀土金属的RE 14 T 3 Al 3系列(RE = Y,Gd–Tm,Lu)扩展到过渡金属T = Cu,Rh和Pd。所有化合物都是通过将稀土元素与适量的T Al前体电弧熔化而制得的。该化合物在空间群为P 4 2 / nmc的四方Gd 14 Co 3 In 2.7型晶体中结晶。两种结构(Y 14 Rh 2.97(1) Al 3.03(1):a = 952.99(4)pm,c = 2292.98(10)pm,wR 2 = 0.0423,2225 F 2值,63个变量; Y 14 Pd 3.16(1) Al 2.84(1):a = 955.06(5)pm,c = 2298.77(10)pm,wR 2 = 0.0416,2225 F 2值,63个变量)已从单晶数据中精制,表明在两个晶体学位置上的T / Al混合。所有合成代表的晶格参数已从吉尼尔(Guinier)粉末X射线衍射数据
Facile reduction of aromatic nitro compounds to aromatic amines catalysed by support-free nanoporous silver
Reduction of aromatic nitro compounds to aromatic amines was realized in excellent yields by using nanoporous silver as a sustainable, heterogeneous catalyst.
通过使用纳米多孔银作为可持续的、异质催化剂,芳香族硝基化合物的还原反应可以实现高产率合成芳香胺。
Crystal structure and magnetic properties of the new ternary actinide compounds AnPd5Al2 (An=U, Np)
Abstract We report the crystalstructure and magneticproperties of newternary actinide compounds UPd 5 Al 2 and NpPd 5 Al 2 . Both compounds crystallize in the body-centered tetragonal ZrNi 2 Al 5 -type tetragonal structure ( I 4/ mmm ). Although the magnetic susceptibility of both compounds follows the Curie–Weiss behavior at high temperature, no magnetic phase transition was observed. UPd 5 Al
摘要 我们报道了新型三元锕系化合物UPd 5 Al 2 和NpPd 5 Al 2 的晶体结构和磁性能。两种化合物均以体心四方 ZrNi 2 Al 5 型四方结构 (I 4/ mmm) 结晶。尽管两种化合物的磁化率在高温下都遵循居里-魏斯行为,但没有观察到磁相变。UPd 5 Al 2 具有非磁性基态,其中磁化率在低温下饱和,而最近报道的NpPd 5 Al 2 超导低于4.9 K。
0.03 . However, in the (Pd 0.9 Pt 0.1 ) 0.97 Al 0.03 alloy, the formation of Al 2 O 3 was not observed, which suggests that the addition of Pt to Pd-Al inhibits the internal oxidization of Al. Cold work and addition of Al and Pt to Pd contribute to decrease the hydrogen diffusion coefficient, but, on the other hand, increase the apparent hydrogen solubility, S app . This increase is more effective for
Pd 0.97 Al 0.03 、Pd 0.9 Pt 0.1 和 (Pd 0.9 Pt 0.1 ) 0.97 Al 0.03 合金样品,冷加工并在 1073K 下内部氧化 72 小时,在 313K 的阴极充电电流水平下进行氢渗透测试对于氢气生成,等于 0.1 和 20 mA。通过 X 射线衍射和透射电子显微镜 (TEM) 研究了内部氧化的影响。通过TEM分析在Pd 0.97 Al 0.03 中观察到Al 2 O 3 棱柱形纳米沉淀物的形成。然而,在(Pd 0.9 Pt 0.1 ) 0.97 Al 0.03 合金中,没有观察到Al 2 O 3 的形成,这表明向Pd-Al中添加Pt抑制了Al的内部氧化。冷加工和向 Pd 添加 Al 和 Pt 有助于降低氢扩散系数,但另一方面,增加表观氢溶解度 S app 。这种增加对于 Pd 0.97 Al 0.03 样品更有效,其中 S app =1075 mol