College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China.
ACS Appl Mater Interfaces. 2019 Dec 18;11(50):47073-47082. doi: 10.1021/acsami.9b17000. Epub 2019 Dec 3.
Electrically bistable devices play an important role in the next generation of information materials. Plasmonic noble metal nanoparticles (Au and Ag NPs) with diameters <6 nm were embedded into 3-D Cd-based metal-organic framework (MOF) matrixes via the photoreduction method to generate Au (Ag) NPs@MOF composites. Electrical bistability measurements on the sandwiched ITO/NPs@MOF/silver devices indicate that two switchable conductivity states with nonvolatile memory behaviors can be observed. The ITO/Au NP@/Ag device with neutral matrix possesses the highest ON/OFF current ratio of 10, which can be attributed to its higher electron tunneling efficiency because of the better dispersity of Au NPs in the MOF matrix. A mechanism regarding the electric-field-induced charge-transfer process assisted by conformational change in the active layer was proposed.
电双稳器件在下一代信息材料中起着重要作用。通过光还原法将直径<6nm 的等离子体贵金属纳米粒子（金和银纳米粒子）嵌入到三维基于 Cd 的金属有机骨架（MOF）基质中，生成 Au（Ag）纳米粒子@MOF 复合材料。在三明治结构的 ITO/NPs@MOF/银器件上进行的电双稳测量表明，可以观察到具有非易失性记忆行为的两种可切换电导率状态。具有中性基质的 ITO/Au NP@/Ag 器件具有最高的 10 的 ON/OFF 电流比，这可以归因于其更高的电子隧穿效率，因为 Au NPs 在 MOF 基质中的分散性更好。提出了一种关于电场诱导电荷转移过程的机制，该过程由活性层构象变化辅助。
