Organic Materials Nanowires Fabricated By Nanoscale Soft Lithography And Its Applications In Sensing Detection

One-dimensional organic nanostructures are essential building blocks for high performance sensors with high sensitivity,fast response time,low power consumption and portability.However,facile fabrication of nanoscale sensors remains challenging due to the high cost,complex processes and incompatibility with organic materials of the conventional nanofabrication techniques.In order to meet current needs,the new nanofabrication technology should have the following advantages: low cost,easy mass production,simple process and high reliability.In this paper,a new method for largescale preparation of nanowire arrays of organic materials is proposed.In order to prove the reliability of this method,the prepared nanowires are used to construct miniaturized devices for gas detection.The main contents and conclusions of this research are as follows:This paper fabricated PEDOT: PSS and TIPS-pentacene nanowire arrays by nanoscale soft lithography,explored and optimized the key parameters in this process.The contents are as follows: 1)nanoimprint lithography;2)the complete sealing between the soft mold and hard substrate;3)the nanowires fabricated by capillary force.Fabricated chemiresistive sensor array from PEDOT: PSS nanowires by nanoscale soft lithography.The contents are as follows: 1)explored the nanoscale effect on gas sensor detection limits and detection performance;2)explored the effect of nanowire surface modification on the interaction between nanowires and gas molecules;3)subjected the response of the sensor array to pattern recognition protocols which leads to a clear separation towards VOCs.Fabricated the field effect transistor(FET)from TIPS-pentacene nanowires by nanoscale soft lithography.The contents are as follows: 1)explored the nanoscale effect on the electrical properties of the FET;2)tested the gas-sensing performance of the FET gas sensor and explained the sensing mechanism.These test results of the gas sensor demonstrate that nanoscale soft lithography is a reliable approach for fabricating nanoscale devices and has the potential of mass producibility.