1. Introduction

Jurate Jolanta Petroniene defended thesis and was awarded PhD in Chemistry 2020. Prior to doctoral studies, she successfully worked in an industrial company and in the service of scientific laboratories. Education acquired in the fields of Physical Chemistry and Electrochemistry. Main research performed in the field of electrochemical analysis, surface investigation by Scanning Electrochemical microscopy (SECM) ^[1][2].

2. Research

SECM is powerful technique for surface investigation. Combined with other methods and devices SECM enables to investigate electrochemical scans of the surface structure, and to evaluate the surface relief with a value of half a micrometer. Evaluated  electrochemical (amperometric)  enzymatic biosensor based on two composite structures consisting of perforated polycarbonate membrane modified by carbon-nanomaterials. The successful tests allow us to say that the glucose sensors created by the chosen method can be reduced according to the perforation dimensions of the polycarbonate film. SECM was successfully applied for  measurements of the cellular response to oxidative stress. The application of this device can be used to make assumptions about cell membrane permeability and other biochemical parameters. The combination SECM and fast Fourier transform-electrochemical impedance spectroscopy (FFT-EIS) as a new tool, which we entitled ‘fast Fourier transform – scanning electrochemical impedance microscopy (FFT-SEIM)’ suitable for the evaluation and treatment of highly complicated electrochemical systems, in which the electrical signal is under limitations of very small surface area of the electrode and Faradaic process is controlled by slow diffusion of species in the electrolyte. This solution led to a better understanding of the diffusion-resolved electrochemical signals due to the geometry of the ultramicroelectrode.  The yeast Saccharomyces Cerevisiae  active and inactivated cells investigation, with mediators entering the cell by diffusion, have been performed and described^[5]. Investigation of human healthy and dilated left ventricle myocardium-derived mesenchymal stem cells (hmMSCs)  by generation-collection mode of scanning electrochemical microscopy (GC-SECM) using 2-methylnaphthalene-1,4-dione (menadione or MD) as a redox mediator presented in three publications. The results achieved in surface electrochemical activity investigations of conductive material and insulators, glucose sensor manufacturing  on carbon nanomaterial compositions^[6]. The investigation of the activity of living single cell by registration the change in concentrations of electrochemically active substances close to the surface by SECM^[7][8]. Postdoctoral studies is in Mechanical engineering of resistive and biodegradable films for force sensors^[9]. Further scientific activity: development and improvement of various sensors based on the  knowledge of the chemical interaction of substances, the mechanical properties of the material and the possibilities of changing the structure based on the knowledge of physical chemistry and electrochemistry. Work experience in institutions of  Lithuania, in Vilnius: Vilnius University, Center for Physical Sciences and Technology, Innovative Medical Center. Work in projects in the mentioned institutions and in project in Vilnius University Faculty of Medicine. Internship in Poland Warsaw Institute of Physical Chemistry of the Polish Academy, where improved working knowledge with SECM. Internship in Clarkson University, Potsdam, USA in the Center for Advanced Materials Processing, where improved knowledge  in electrochemical deposition of multi-metallic coatings using rotating disc electrodes. Electrochemically deposited coatings are designed to produce  the hydrogen as a fuel from alkaline solutions. Postdoctoral studies in Vilnius TECH University, Department of Mechatronics, Robotics and Digital Manufacturing.