Large-Scale Synthesis Of Metallic Nanowires And Construction Of Micro/Nanp-Electronic Devices

Micro/nano electronic devices have better electrical properties and lower costdue to their smaller size than other devices.Recent years have witnessed an expandinginterest in the application of micro/nano electronic devices. Single-walled carbonnanotubes(SWNTs)and P3HT are very promising building blocks for futureelectrical devices due to their excellent electrical properties. How to constructlarge-scale electronic devices cheaply is a challenging problem. Present usedfabrication techniques have some shortages including high-cost, multi-step hightemperatures and dustless condition. To address the existing problems of presentmicrofabrication techniques, we have developed a technique for massive productionof devices, in which micromolding in capillaries(MIMIC)and micro printing arecombined. And we prepared graphene electrode based SWNTs or Poly(3-hexylthiophene) transistors by using our developed method.In this paper, we used reduced graphene oxide (rGO) as electrode, which havesimilar structrure with carbon nanotubes and P3HT. The as-made devices have goodperformance as a result of low contact resistivity. The SWNTs transistors have goodelectrical transport property with a high on/off ratio of about 105.The field effectmobility (u) calculated using the standard method is among 102-104 cm2/V·s,threshold is 1.2V. The properties are affected with the type of single-carbonnanotubes ,the dispersion and the times of BD. Poly (3-hexylthiophene) based filmdevice character as p-type transistor and is sensitive with the air and light et al. Thefield effect mobility (μ) calculated using the standard method is among 103-100cm2/V·s with on/off current ratios of around three orders.We could prepare the composites of graphene and metallic nanowires to improvethe conductivity of the electrodes. Metallic nanowires exhibit lower meltingtemperature and fine solubility, which make them possible for soluble procedure. Inthis paper, large scale metallic nanowires can be prepared by a chemical solutionapproach to meet the industrial needs. The conductivity of electrode has beenimproved by using the composite of metal nanowires and chemical reduced grapheneoxide. The composite possesses the advantages of both graphene and metal nanowires,which generates a lower contact resist and higher conductivity. Results from thisstudy provide important basis for the application of composite in future devices.