Flexible Ag/FMWCNT Electrode Fabricated Through Benign Reducing Agent for Sensor Application

• Published in: Journal of the Electrochemical Society 2019, Vol.166 (16), p.D916-D922, Article D916
• Main Authors: M, Reshma, Manu, R.
• Format: Article
• Language: English
• ISSN: 0013-4651; 1945-7111
• DOI: 10.1149/2.0381916jes

In the present work environmentally benign chemical agents were used for fabrication of silver functionalized multiwalled carbon nano tubes (Ag/FMWCNT) flexible conductive films. The leaf extract of Melissa officinalis serves as an efficient route for the synthesis of silver nanoparticles and also as reducing agent during electroless process. A simple and low cost electroless deposition process was employed for the synthesis of the electrode material and for fabrication of the Ag/FMWCNT film. The morphology and structure of the composite films were analyzed using Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray analysis (EDAX) and the functional groups in the composite film was identified by FTIR technique. Electrochemical characterization of flexible Ag/FMWCNT electrode includes cyclic voltammetry (CV) and impedance spectroscopy which revealed excellent pseudo capacitive nature, cyclic stability and energy storage characteristics for the developed film. The sensor characteristics of the fabricated electrode for detection of dopamine is investigated using CV, Differential pulse voltammetry (DPV) and chrono amperometric (CA) techniques. The Ag/FMWCNT exhibited good sensor characteristics with a detection limit of 0.7μM for dopamine.