Gold nanorods doping induced performance improvement of room temperature OTFT NO2sensors.
Sihui HouBingyao ShaoXinge YuJunsheng YuPublished in: Nanotechnology (2021)
Solution-processed organic thin-film transistors (OTFTs) are regarded as the promising candidates for low-cost gas sensors due to their advantages of high throughput, large-area and sensitive to various gas analytes. Microstructure control of organic active layers in OTFTs is an effective route to improve the sensing performance. In this work, we report a simple method to modify the morphology of 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) thin films via doping gold nanorods (Au NRs) for enhancing the performance of the corresponding OTFT sensors for nitrogen dioxide (NO2) detection. With the optimized doping ratio of Au nanorods, the TIPS-pentacene OTFT snesors not only exhibit a 3-fold increase in mobility, but also obtain a high sensitivity of 70% to 18 ppm NO2with a detection limit of 270 ppb. The microstructures and morphologies of the modified TIPS-pentacene thin film characterized by atomic force microscopy and field scanning electron microscope. The experimental results indicate that the proper addition of Au NRs could effectively regulate the grain size of TIPS-pentacene, and therein control the density of grain boundaries during the crystallization, which is essential for the high-performance gas sensors.
Keyphrases
- low cost
- room temperature
- reduced graphene oxide
- ionic liquid
- atomic force microscopy
- high throughput
- sensitive detection
- gold nanoparticles
- loop mediated isothermal amplification
- high speed
- transition metal
- real time pcr
- white matter
- single molecule
- high glucose
- high resolution
- single cell
- diabetic rats
- multiple sclerosis
- water soluble
- mass spectrometry
- quantum dots