Title: Titanium nano-columns on graphene monolayer or Cu electrode for electrochemical dopamine detection

Abstract

Titanium nano-columns/graphene monolayer-Cu electrode, was prepared using an advanced, glancing angle deposition by magnetron sputtering, physical vapor deposition (PVD) method and investigated for electrochemical dopamine detection. The nano-columns were grown, on a commercial single-layer graphene on copper foil substrate, almost vertical and at some points parallel to the atomic flux. The morphology and the surface were investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques. The results shown that the average height of the nanocolumns is ~170 nm; while there are some spots on the electrode of inhomogeneous growth of nanocolumns. The electrochemical detection of dopamine with the as-prepared electrode was investigated using the cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. According to the DPV results the low detection limit was 10 μΜ dopamine in neutral environment (PBS), at 36.6oC, while according to the calibration curve the current response-concentration presents an excellent linear relation (Figure 1 inset) and 200 μΑ/mM high sensitivity.

Biography

Angeliki Brouzgou is Asst. Prof. in the Department of Energy Systems in University of Thessaly, in Greece. Her research interests include the design and development of electrochemical systems emphasizing on electrochemical (bio)sensors as well as on the preparation of innovative nanomaterials. authored and co-authored more than 25 articles in peer reviewed International Journals and has co-authored four Chapters in Books of International publishing houses (received for her work more than 1500 citations)). In her research activities, from 2013 to 2020, she was occupied as a postdoctoral researcher in the Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Physics and Engineering, Sun Yatsen University, Guangzhou, China, the École Nationale supérieure de chimie de Paris, Université de Paris, Paris, France and in the Istituto di Tecnologie Avanzate per l'energia "Nicola Giordano" (CNR-ITAE), Messina, Italy.