Peking University

Na Xin

Xuefeng Guo

Mingliang Li

Hongliang Chen

Dahui Qu

Weining Zhang

Chuancheng Jia

Linan Meng

The application relates to a strongly-polarized molecule of the following general formula: wherein A denotes a group having a polarizability greater than 2 C·m/V; Rand Rare respectively hydrogen, halogen, a hydroxyl group, an amino group, a cyano group, a nitro group, a carboxyl group, a Calkyl group, a Calkoxy group, a halogenated Calkyl group, a halogenated Calkoxy group, a hydroxyl Calkyl group, a hydroxyl Calkoxy group, or a Calkyl amino group; xand xdenote 0 or an integer no less than 1, respectively; and yand ydenote 0 or an integer no less than 1, respectively. The application further relates to a strongly-polarized molecule-graphene molecule heterojunction, and a single molecule field effect transistor comprising a substrate, a gate, a dielectric layer and the strongly-polarized molecule-graphene molecule heterojunction; and the dielectric layer is located between the gate and the strongly-polarized molecule-graphene molecule heterojunction. The single molecule field effect transistor provided by the application can realize highly-efficient gate modulation.

Strongly-polarized molecule, and single molecule field effect transistor prepared therefrom

Disclosed are a series of photoisomeric compounds, preparation method therefor and device comprising the compounds, wherein a photoisomeric compound-graphene molecular junction device is formed by linking the photoisomeric compound to a gap of two-dimensional monolayer graphene having a nano-gap array via an amide covalent bond. When a single photoisomeric compound is bridged to the gap of the two-dimensional monolayer graphene having a nano-gap array, the devices have a reversible light-controlled switching function and a reversible electrically-controlled switching function. A molecular switch device prepared by the method can achieve a high reversibility and a good reproducibility. The number of light-controlled switching cycles can exceed 10, and the number of electrically-controlled switching cycles can reach about 10or greater. Moreover, the above-mentioned reversible molecular switch device remains stable within a period of more than one year. In addition, flexible non-losable organic memory transistor devices and light-responsive organic transistor devices can be constructed using the above-mentioned series of photoisomeric compounds.

Photoisomeric compounds and device comprising the same

Growing community of inventors

Beijing, China

Na Xin