论文标题
将纳米级丝带塑造成可控半径的微螺旋和螺距
Shaping Nanoscale Ribbons into Micro-Helices of Controllable Radius and Pitch
论文作者
论文摘要
我们报告了用纳米厚的丝带制造高度柔韧的微米大小螺旋。基于通过表面张力介导的这种超薄丝带的螺旋盘，我们证明可以利用高度约束材料的蠕变性能增强，以完全控制最终形状，以将螺旋形成所需的几何形状。螺旋半径，总长度和音高角度在较宽的范围内自由和独立调谐：$ \ sim $ 1-100千分尺内的半径，$ \ sim $ \ sim $ 100-3000千分尺，$ \ sim $ \ sim $ 0-70°。该制造方法已通过三种不同的材料进行了验证：聚（甲基甲基丙烯酸甲酯），聚（二甲基氨基甲基甲基丙烯酸酯）和过渡金属金属果仁核化量子点，每点分别对应于不同的固相结构：聚合物玻璃，一个交叉链接的水凝胶和纳米机构阵列。这证明了相对于材料选择的出色多功能性，从而进一步控制了螺旋力学特性。
We report fabrication of highly flexible micron-sized helices from nanometer-thick ribbons. Building upon the helical coiling of such ultra-thin ribbons mediated by surface tension, we demonstrate that the enhanced creep properties of highly confined materials can be leveraged to shape helices into the desired geometry with full control of the final shape. The helical radius, total length and pitch angle are all freely and independently tunable within a wide range: radius within $\sim$ 1-100 micrometer, length within $\sim$ 100-3000 micrometer, and pitch angle within $\sim$ 0-70°. This fabrication method is validated for three different materials: poly(methyl methacrylate), poly(dimethylaminoethyl methacrylate), and transition metal chalcogenide quantum dots, each corresponding to a different solid-phase structure: respectively a polymer glass, a crosslinked hydrogel, and a nanoparticle array. This demonstrates excellent versatility with respect to material selection, enabling further control of the helix mechanical properties.
