Processes for the production of organometallic compounds
申请人:Peters Walters David
公开号:US20060161014A1
公开(公告)日:2006-07-20
This invention relates to processes for the production of organometallic compounds represented by the formula H
3
Al:L
n
wherein L is one or more Lewis bases capable of providing an unshared electron pair to the aluminum and n is 1 or 2, which comprise (a) forming a first solution of an alkali metal aluminum hydride and a Lewis base in an ethereal solvent, (b) adding to said first solution an aluminum halide in an ethereal solvent under reaction conditions sufficient to produce a second solution comprising said organometallic compound, and (c) separating said organometallic compound from said second solution. The organometallic compounds are useful in semiconductor applications as chemical vapor or atomic layer deposition precursors for film depositions.
Polymer-Directed Growth of Plasmonic Aluminum Nanocrystals
作者:Shaoyong Lu、Hua Yu、Samuel Gottheim、Huimin Gao、Christopher J. DeSantis、Benjamin D. Clark、Jian Yang、Christian R. Jacobson、Zhongyuan Lu、Peter Nordlander、Naomi J. Halas、Kun Liu
DOI:10.1021/jacs.8b08937
日期:2018.11.14
formation of 111} facet-terminated octahedral and triangular plates. The concentration of the catalyst, titanium (IV) isopropoxide, determines the size of Al NCs by controlling the number of seeds. Depending on nanoparticle size, the solutions of Al NCs possess distinct colors, a characteristic feature of plasmonic nanomaterials. This robust and controlled chemical synthesis of Al NCs lays a foundation for
铝纳米晶体(Al NCs)的可控化学合成的挑战只取得了有限的成功。一个主要的障碍是缺乏有效的配体来控制 Al NCs 的成核和生长。在这里,我们展示了使用聚合物配体、二硫代苯甲酸枯基酯封端的聚苯乙烯 (CDTB-PS) 对单分散 Al NC 进行尺寸和形状控制的合成。密度泛函理论 (DFT) 计算表明 CDTB-PS 在 Al100} 面上显示出选择性吸收,诱导纳米立方体和三角双锥体的形成。然而,过量的 CDTB-PS 会降低铝原子的过饱和度,导致 111} 面终止的八面体和三角形板的形成。催化剂、异丙醇钛 (IV) 的浓度通过控制晶种数量来决定 Al NCs 的大小。根据纳米颗粒的大小,Al NCs 的溶液具有不同的颜色,这是等离子体纳米材料的特征。这种稳健且可控的 Al NCs 化学合成为 Al 作为当前和未来应用的可持续等离子体材料奠定了基础。