Name: gyroid nickel nanostructures from diblock copolymer supramolecules
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1，准备和PS-B-P4VP的表征（PDP）配合双Gyroid形态<ol><li>称出聚苯乙烯- 嵌段 -聚（4 -乙烯基吡啶）（PS-β-P4VP）和十五烷基苯酚（PDP中，M R =304.51克/摩尔）。为了获得gyroid形态，（根据线性AB二嵌段共聚物的相图P4VP（PDP）的嵌段的重量分数（F P4VP（PDP））应为约 0.6），小心地选择PDP的量应。通常，0.15-0.2克共聚物PS-b-P4VP的导致共聚物PS-b-P4VP...

<ol>
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超分子复合物的前体秩序井然金属nanofoams成功应用。在该方法中，关键的步骤是获得合适的模板， 即与gyroid形态的模板。在嵌段共聚物的相图的gyroid区域是非常小的，这是相当困难的目标。这意味着，如果常规的嵌段共聚物被用作起始原料时，相当精细的合成必须被重复，直到所希望的组合物，其引起的gyroid形态，就达到了。在共聚物PS-b-P4VP（PDP）的配合物不同的组合物，并且因此...

有可用于金属nanofoams准备几种方法：去合金1-3，溶胶-凝胶方法4,5，nanosmelting 6,7和燃烧合成8。在脱合金过程中，起始材料通常是二元合金，例如，银和金的合金。越少的贵金属银，在这种情况下，可通过化学或电化学产生了无序多孔金泡沫与纳米韧带除去。在燃烧合成，金属是一个充满活力的前体，它在分解过程中释放出能量和驱动器的金属nanofoam 8形成的混合。研究的金属泡沫材料的机械性能表明，在无序结构的应力不能被有效地从韧带纳米发送到整体宏观9-11，因此良好有序金属nanofoams预期相比，具有优越的机械性能无序的。 这里所表示的想法是使用嵌段共聚物自组装成有序的纳米结构前体对金属nanofoams。取决于嵌段共聚物中，单体单元的总数，并经化学连接块之间的斥力的范围的组成，各种形态出现，例如：球形，圆柱形，薄片状，双gyroid，六角形层状穿孔，而其他12-14 。此外，聚合物嵌段可以选择性地降解，导致纳米多孔材料15。最常用的方法包括：臭氧分解16-18，UV照射19，反应离子蚀刻20-22和23-26的溶解。所产生的多孔结构可被回填与各种无机材料。金属氧化物（ 如 SiO 2的，TiO 2的）通常是通过溶胶-凝胶法引入到模板的通道27-29。萨尔瓦多ectrochemical和电解电镀，通常用于沉积金属之中或之上的模板30-33。最后，将剩余的聚合物可以从通过热解2，溶解34,35，紫外线劣化28,29 等的聚合物/无机纳米杂化物去除在我们的方法中，我们从聚苯乙烯- 嵌段 -聚（4 -乙烯基吡啶）的超分子复合物（PS-B-P4VP）嵌段共聚物和两亲十五烷基苯酚（PDP）的分子开始。这是复杂的PDP和吡啶环（ 图1a）之间的氢键的结果。起始嵌段共聚物的组合物和加入的PDP的量被选择在这样一种方式，所得到的体系自组装在双连续双gyroid形态与PS网络和一个P4VP（PDP）的基体（ 图1b）。 PDP分子变成选择性地溶解于乙醇和P4VP链崩溃到PS网络（图1c）。接着，用无电解电镀法，镍被沉积到模板（ 图1d）的孔中。 通过热分解除去残留的聚合物后，一个有序gyroid镍nanofoam得到（ 图1e）。

<table border="1">
 <tbody>
 <tr>
 <td>REAGENTS:</td>
 <td></td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>PS-b-P4VP, CAS: 26222-40-2</td>
 <td>Polymer Source Inc.</td>
 <td>P9009-S4VP 
 P136-S4VP 
 P5462-S4VP 
 P3912-S4VP</td>
 <td>additional information are provided in a separate table</td>
 </tr>
 <tr>
 <td>PDP</td>
 <td>Aldrich</td>
 <td>P4402-100G-A</td>
 <td>recrystallized twice from petroleum ether</td>
 </tr>
 <tr>
 <td>SnCl2</td>
 <td>Acros Organics</td>
 <td>196981000</td>
 <td></td>
 </tr>
 <tr>
 <td>PdCl2</td>
 <td>Aldrich</td>
 <td>76050</td>
 <td></td>
 </tr>
 <tr>
 <td>NiSO4 x H2O</td>
 <td>Sigma-Aldrich</td>
 <td>227676</td>
 <td></td>
 </tr>
 <tr>
 <td>lactic acid</td>
 <td>Aldrich</td>
 <td>W261106</td>
 <td></td>
 </tr>
 <tr>
 <td>citric acid trisodium salt</td>
 <td>Sigma-Aldrich</td>
 <td>C3674</td>
 <td></td>
 </tr>
 <tr>
 <td>borane dimethyl amine complex</td>
 <td>Aldrich</td>
 <td>180238</td>
 <td></td>
 </tr>
 <tr>
 <td>PS-b-P4VP catalogue number</td>
 <td>Mn (PS), g/mol</td>
 <td>Mn(P4VP), g/mol</td>
 <td>PDI</td>
 </tr>
 <tr>
 <td>P9009-S4VP</td>
 <td>24000</td>
 <td>9500</td>
 <td>1.1</td>
 </tr>
 <tr>
 <td>P136-S4VP</td>
 <td>31900</td>
 <td>13200</td>
 <td>1.08</td>
 </tr>
 <tr>
 <td>P5462-S4VP</td>
 <td>37500</td>
 <td>16000</td>
 <td>1.3</td>
 </tr>
 <tr>
 <td>P3912-S4VP</td>
 <td>41500</td>
 <td>17500</td>
 <td>1.07</td>
 </tr>
 </tbody>
</table>

gyroid nickel nanostructures from diblock copolymer supramolecules

纳米多孔金属泡沫体具有以下特性的独特组合， - 它们的催化活性，热和电传导性，而且，具有高孔隙率，高的表面与体积之和的强度 - 重量比。不幸的是，用于制备金属纳米结构的常见的方法使材料具有高度无序的结构，它可能对它们的机械性能有不利影响。嵌段共聚物具有的能力，以自组装成有序的纳米结构，并且可以作为用于良好有序金属nanofoams制备模板被应用。这里我们描述的嵌段共聚物为基础的超分子复合物的应用-聚苯乙烯- 嵌段 -聚（4 -乙烯基吡啶）（十五烷基）共聚物PS-b-P4VP（PDP） -作为前体为良序镍nanofoam。超分子复合物表现出类似传统嵌段共聚物的相行为，可以自组装成的双连续gyroid形态机智放置在P4VP（PDP）矩阵H两个PS网络。 PDP可以被溶解在乙醇中，导致可与金属回填多孔结构的形成。利用无电解镀法，镀镍可被插入到模板的通道。最后，将剩余的聚合物可通过从产生纳米多孔泡沫镍与逆gyroid形态学的聚合物/无机纳米杂化物的热解被除去。

。超分子复合物的形态共聚物PS-b-P4VP（PDP）x由TEM和SAXS 图2a检查和2b显示的代表超分子配合物的典型gyroid模式：双波和已知代表货车轮图案通过（211）突起和（111）面的gyroid单元电池分别。 PS块域显得明亮而P4VP（PDP）×块域出现暗由于碘染色。 图2c代表了不同的gyroid样品，其中的周期性下降时用2。SAXS峰的一个因素的双波模式位置：√6Q *√8Q *√14Q *√22...

Watch this Scientific Journal Video about Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules at JoVE.com

Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules

Gyroid镍纳米结构的嵌段共聚物超分子

本文介绍了有序的镍nanofoams 通过电镀金属沉积制备从上自组装嵌段共聚物为基础获得的超分子纳米多孔模板。

Nanoporous metal foams possess a unique combination of properties - they are catalytically active, thermally and electrically conductive, and furthermore, ...

Research

JoVE Journal

Chemistry

Nucleoside Triphosphates - From Synthesis to Biochemical Characterization

核苷三磷酸 - 从合成到生化特征

The  traditional strategy for the introduction of chemical functionalities is the  use of solid-phase synthesis by appending suitably modified ...

科研

化学

Synthesis of Ligand-free CdS Nanoparticles within a Sulfur Copolymer Matrix

a硫磺共聚物基质内的免费配体硫化镉纳米粒子的合成

Aliphatic ligands are typically used during the synthesis of nanoparticles to help mediate their growth in addition to operating as high-temperature ...

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by &#960;-&#960; Stacking Interactions

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by ÃƒÆ’Ã‚ÂÃƒÂ¢Ã¢â‚¬Å¡Ã‚Â¬-ÃƒÆ’Ã‚ÂÃƒÂ¢Ã¢â‚¬Å¡Ã‚Â¬ Stacking Interactions

一个两亲性共聚物的阴离子聚合通过π-π堆积作用稳定嵌段共聚物胶束的制备

In this study, an amphiphilic copolymer that includes a core-forming block with phenyl groups was synthesized by living anionic polymerization of phenyl ...

Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures

形状-各向异性胶体镉硫纳米结构的 Facet-to-facet 连接

Here, we describe a protocol that allows for shape-anisotropic cadmium chalcogenide nanocrystals (NCs), such as nanorods (NRs) and tetrapods (TPs), to be ...

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

铂镍纳米线的合成及减氧性能优化

Platinum-nickel (Pt-Ni) nanowires were developed as fuel cell electrocatalysts, and were optimized for the performance and durability in the oxygen ...

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area

化学沉淀法合成铌2O5改性高比表面积镍催化剂

We demonstrate a method for the synthesis of NixNb1-xO catalysts with sponge-like and fold-like nanostructures. By varying the Nb:Ni ratio, a series of ...

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

C 型60/石墨烯混合纳米结构的制备与表征

Physical thermal deposition in a high vacuum environment is a clean and controllable method for fabricating novel molecular nanostructures on graphene. We ...

Disentangling High Strength Copolymer Aramid Fibers to Enable the Determination of Their Mechanical Properties

解析高强共聚物芳纶纤维使其力学性能的测定

Traditionally, soft body armor has been made from poly(p-phenylene terephthalamide) (PPTA) and ultra-high molecular weight polyethylene. However, to ...

Stable DNA Motifs, 1D and 2D Nanostructures Constructed from Small Circular DNA Molecules

由小圆形 DNA 分子构建的稳定 DNA 分子、一维和二维纳米结构

This article presents a detailed protocol for synthesis of small circular DNA molecules, annealing of circular DNA motifs, and construction of 1D and 2D ...

Gene-therapy Inspired Polycation Coating for Protection of DNA Origami Nanostructures

基因治疗诱导聚化涂层保护 dna 折纸纳米结构

DNA origami nanostructures hold an immense potential to be used for biological and medical applications. However, low-salt conditions and nucleases in ...