We present the production of a metallic single-gyroid nanomaterial by using lipid-cubic-phase templating. Single-gyroid materials are chiral nanowire networks whose chirality potentially gives rise to optical metamaterial behavior, leading to considerable recent scientific interest. Until now, single-gyroid materials have been fabricated by using block copolymer templates, producing unit cell sizes down to 20 nm. Here, we present the use of a lipid-cubic-phase template with which we can produce single-gyroid structures with unit cell sizes of less than half that of the smallest reported previously. Single-gyroid platinum materials with controllable unit cell sizes between 8.4 and 9.5 ± 0.3 nm can be produced by using different lipid proportions in the template. Furthermore, the template self-assembles spontaneously; metal deposition is achieved in an aqueous solution through galvanic displacement on a stainless steel substrate at room temperature, and the template dissolves in ethanol after deposition. The process is therefore straightforward and synthetically attractive, avoiding the complex multistep routes and elevated temperatures associated with block copolymer templating routes to single-gyroid nanomaterials.

中文翻译：

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通过脂质立方相模板生产具有可调亚 10 nm 晶胞尺寸的金属单螺旋体：用于催化和光学应用的手性纳米材料

我们展示了使用脂质立方相模板生产金属单螺旋纳米材料。单螺旋体材料是手性纳米线网络，其手性可能会引起光学超材料行为，从而引起了近期相当大的科学兴趣。到目前为止，单螺旋体材料是通过使用嵌段共聚物模板来制造的，产生的晶胞尺寸小至 20 nm。在这里，我们提出了使用脂质立方相模板，用它我们可以产生单位细胞尺寸不到先前报道的最小单位细胞尺寸一半的单螺旋结构。通过在模板中使用不同的脂质比例，可以生产晶胞尺寸在 8.4 至 9.5 ± 0.3 nm 之间的可控单螺旋体铂材料。此外，模板可以自发地自组装；室温下在水溶液中通过电偶位移在不锈钢基板上实现金属沉积，沉积后模板溶解在乙醇中。因此，该过程简单且具有合成吸引力，避免了与单螺旋纳米材料的嵌段共聚物模板路线相关的复杂的多步骤路线和高温。