Nanoscrews: Asymmetrical Etching of Silver Nanowires

Rachel Lee Siew Tan, Wen Han Chong, Yuhua Feng, Xiaohui Song, Chu Long Tham, Jun Wei*, Ming Lin*, and Hongyu Chen*

Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371

Singapore Institute of Manufacturing Technology, Agency for Science, Technology and Research, Singapore 637662

Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Singapore 138634

Abstract:World’s smallest screws with helical threads are synthesized via mild etching of Ag nanowires. With detailed characterization, we show that this nanostructure arises not from the transformation of the initial lattice, but the result of a unique etching mode. Three-dimensional printed models are used to illustrate the evolution of etch pits, from which a possible mechanism is postulated.

我们在相对温和的刻蚀条件下，通过对银纳米线进行刻蚀合成了世界上最小的纳米“螺丝”究。在对纳米“螺丝”的复杂形貌结构进行表征后，我们展示了这种结构的形成不是由于晶格的转变，而是源于一种独特的刻蚀模式。同时，利用3D打印的模型，阐明了每个刻蚀凹槽的演变，并推演出可能的形成机理。

J. Am. Chem. Soc.,2016,138(34), pp 10770–10773(2016年影响因子:13.038).