基于Rotaxane类分子的稳定、重复、可反复擦写的纳米信息存储

Rotaxane类分子在溶液中可以发生可逆的分子构型改变,并随之引起分子电导特性的转变,在纳米电子器件和分子存储器件中具有潜在的应用前景.但是还不能确定这类分子在固体薄膜中是否具有类似于在溶液中的结构与电导转变,需要对Rotaxane类分子固态薄膜进行深入的结构和特性研究.文章作者在一类Rotaxane分子H1和H2的固态薄膜上获得了纳米尺度的电导转变和稳定、重复的、近于单分子尺度的纳米级存储;同时,成功地在H2分子薄膜上实现了信息记录点的可反复擦写.另外,在单个分子和亚分子的水平上直接观察到了Rotaxane分子在外电场诱导下分子结构的可逆变化以及随之发生的相应电导特性的可逆转变, 证实了Rotaxane分子在固态薄膜中的可逆结构和电导转变.

Stable,reversible,erasable and rewritable nanorecording with Rotaxane functional materials

Rotaxane-based molecules show structural and electrical bistability in solution which is of value for molecular electronic devices and nanorecording. However, the conductance transition of Rotaxane in solid state form is still ambiguous. We have obtained nanometer scale conductance transition and stable ultrahigh-density data storage on two kinds of Rotaxane H1 and H2 thin films. Furthermore, Reversible conductance transition in Rotaxane H2 thin films has been achieved, together with erasable and rewritable nanorecording on the single molecule scale. Meanwhile, structural and conductance transitions have been directly observed in single Rotaxane H2 molecules, which confirms these Reversible transitions in solid state rotaxane thin films.