目前,日本科学家研制一种转子纳米装置,这非常像旋转的呼拉圈,而且是世界上最小的纳米呼拉圈。研究人员选择轮烷作为研究对象,这个分子结构系统由两部分组成:一个杆状分子上套着另一个像呼拉圈一样的环状分子; At present, Japanese scientists develop a rotor nanodevice, which is much like a rotating hula hoop, and is the smallest nano hula hoop in the world. The researchers chose rotaxane as the research object. The molecular structure system consists of two parts: one rod-like molecule is covered with another ring-like molecule like a hula-hoop;