3 years ago

Flexible poly (3, 3′′′- dialkylquaterthiophene) based interdigitated metal-semiconductor-metal ammonia gas sensor

Flexible poly (3, 3′′′- dialkylquaterthiophene) based interdigitated metal-semiconductor-metal ammonia gas sensor
In this article, poly (3, 3′′′- dialkylquaterthiophene) (PQT-12) thin film based interdigitated metal-semiconductor-metal (MSM) is fabricated by a spin coating method on flexible polyamide substrate for ammonia (NH3) gas sensing applications possibly for the first time. The average roughness, root mean square roughness, peak-to-peak spacing, average grain size, and grain length are measured as 0.6, 0.7, 6.4, 32.1, and 53.4nm, respectively by atomic force microscopy for the PQT-12 film. These results clearly confirm the formation of a very smooth film on polyamide substrate to be explored for the gas sensing applications. Further, the scanning electron microscopy, fourier transform infrared spectroscopy, and cyclic voltammetry measurements have been done to investigate the effect of ammonia gas on the PQT-12 thin film. The resistance of the sensor is increased with the ammonia gas concentration as a result we get a very good response of 8.6% at 100ppm with a detection limit of 300 ppb. The fabricated sensor exhibits a response time of 8s and recovery time of 103s. The sensor is tested for real-time ammonia sensing in the ambient environment using low-cost electronic circuits to demonstrate its fast response.

Publisher URL: www.sciencedirect.com/science

DOI: S0925400517314363

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.