Here, we report on a new aero-material, called aero-ZnS, representing self-organized architectures made of ZnS hollow micro-tetrapod structures with nanoscale thin walls. The fabrication process is based on the hydride vapor phase epitaxy of CdS on sacrificial micro-tetrapods of ZnO with simultaneous or subsequent transformation of CdS into ZnS and removal of the sacrificial ZnO crystals. The nanostructure of the obtained ZnS hollow micro-tetrapods exhibits the polytypic intergrowth of wurtzite- and sphalerite-type phases perpendicular to their close packed planes. The inner surface of the micro-tetrapod walls preserves oxygen sites, as demonstrated by imaging based on electron energy-loss filtering. The self-organized aero-ZnS architecture proves to be hydrophilic under tension and hydrophobic when compressed against water. Self-propelled liquid marbles assembled using ZnS hollow micro-tetrapod structures are demonstrated.

中文翻译：

---

用于微流体应用的具有双重亲水-疏水特性的 Aero-ZnS 结构

在这里，我们报告了一种称为 aero-ZnS 的新型航空材料，它代表了由具有纳米级薄壁的 ZnS 中空微型四足结构制成的自组织结构。制造过程基于 CdS 在 ZnO 的牺牲微四足体上的氢化物气相外延，同时或随后将 CdS 转化为 ZnS 并去除牺牲的 ZnO 晶体。所获得的 ZnS 中空微型四足体的纳米结构表现出垂直于其密堆积平面的纤锌矿型和闪锌矿型相的多型共生。微四足动物壁的内表面保留了氧位点，正如基于电子能量损失过滤的成像所证明的那样。自组织的空气硫化锌结构被证明在张力下是亲水的，而在对水压缩时则是疏水的。