Organic/metallic composites have demonstrated electrical bistability,as well as memory effects. These advanced materials have shown potential applications in digital information storage because of their good stability,flexibility and fast response speed. The electric bistability phenomenon can be explained by electric field-induced electron transfer/storage. This article reviews the recent progress of memory devices based on organic/metallic and polymeric composites with electric bistability.
Insulated molecular wires of poly(phenylenevinylene) (PPV) were prepared by wrapping the conjugated backbones with dendrons through a noncovalent approach. It was found that electrostatic interaction between the quaternary ammonium groups of PPV-1 and the carboxylate moieties in dendrons induced the packing of dendrons along PPV-1 conjugated backbones. Absorption and emission spectroscopic examinations in solution and solid film indicated that the PPV-1 backbones adopted a more planar and isolated conformation in the complexes. Furthermore, interchain interactions in the complexes could be greatly reduced, improving the quantum yield of PPV-1.
1 Introduction Conducting polymer nanostructures (e.g.nanotubes or nanofibers) have received considerable attention owing their unique properties and promising applications in technology and nano-devices[1]. Conducting polymer nanostructures can be generally synthesized through "hard" and "soft" template method.Usually an external hard template in a "hard-template" method is required and the post-treatment of removing template is rather tedious."Soft-template" method is advantageous of omitting external...
DING Hang-jun1, SHEN Jiao-yan2, WAN Mei-xiang1, CHEN Zhao-jia2(1.Institute of Chemistry,Chinese Academy of Sciences Beijing 100080,China
