Related Experiment Video
Updated: Jan 3, 2026
Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
Published on: July 22, 2013
High performance tube sensor based on PANI/Eu3+ nanofiber for low-volume NH3 detection
Wenqian Zhang1, Guishun Li1, Changkun She1
1Engineering Research Center for Nanophotonics and Advanced Instrument of Ministry of Education; Key Laboratory of Polar Materials and Devices (Ministry of Education); The Extreme Optoelectromechanics Laboratory; Department of Materials; School of Physics and Electronic Science, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
Abstract:
A novel polyaniline (PANI)/Eu3+ nanofiber sensing film was prepared in the presence of Eu(NO3)3 which serves as structure-directed agent. The morphological, component, crystallinity and electrochemical properties were carried out by using Scanning Electron Microscope (SEM), Energy-Dispersive X-ray (EDX), Fourier Transform Infrared spectroscopy (FT-IR), X-Ray Diffraction (XRD) and Brunauer-Emmett-Teller (BET) techniques. The results indicated the nanofiber-like network with porous structure appeared in the PANI embedded by Eu3+ ions, thereby leading to large specific surface area. Furthermore, the PANI/Eu3+ nanofibers were grown onto the inner wall of capillary glass to form the tube sensor. By the sensing measurements, this tube sensor enabled the detection of low-volume (0.3 mL) NH3 for response 435% at concentration of 0.25 ppm with a short response time (5 s) and recovery time (5 s), and the performances of reproducibility and selectivity were also excellent. The above results demonstrated the potential application of PANI/Eu3+ tube sensor for low-volume NH3 gas.
