Scientific work of UTM teachers – among the most cited in 2018-2019

The scientific work of prof., Dr. Oleg Lupan and lect., dr. Vasile Postica was recognized by Physica Status Solidi Rapid Research Letters (PSS RRL) in Germany as the most cited work worldwide, entering the “Top cited paper” during the last two years, January 2018 – December 2019.

The paper “Functionalized ZnO/Pd Nanowires for Nanosensors” (; authors: Oleg Lupan, Vasile Postica, Rainer Adelung, Frédéric Labat, Ilaria Ciofini, lrich Schürmann, Lorenz Kienle, Lee Chow, Bruno Viana, Thierry Pauporté) is the common result of the international collaboration of the team led by prof. Lupan Oleg from UTM with those led by Adelung teachers, CAU from Germany, Chow, UCF from USA, Ciofini, PSL from France and Pauporté, CNRS from France. The paper elucidates a novel method for surface doping and functionalization of ZnO nanowires (NWs) with Pd (Pd/ZnO) in a one‐step process. The main advantage of this method is to combine the simultaneous growth, surface doping, and functionalization of NWs by using electrochemical deposition (ECD) at relatively low temperatures (90 °C).

The proposed approach essentially reduces the number of technological steps of nanomaterial synthesis and final nanodevices fabrication with enhanced performances. A series of nanosensor devices is fabricated based on single Pd/ZnO NWs with a radius of about 80 nm using a FIB/SEM system. The influence of Pd nominal composition in Pd/ZnO NW on the H2 sensing response is studied in detail and a corresponding mechanism is proposed. The results demonstrate an ultra‐high response and selectivity of the synthesized nanosensors to hydrogen gas at room temperature. The theoretical calculations presented in the paper further validated the experimental hypothesis obtained by the authors of the paper. The authors’ results demonstrate the importance of noble metal presence on the surface due to doping and functionalization of nanostructures in the fabrication of highly‐sensitive and selective gas nanosensors operating at room temperature with reduced power consumption.

The paper is part of a series of articles on the topic given in the volume of over 62 pages of print that directly contribute to the development of nanotechnologies and nanosensors by the team from the Center of Nanotechnologies and Nanosensors, the Department of Microelectronics and Biomedical Engineering (DMIB) from the Faculty of Computers, Informatics and Microelectronics of UTM. All of these provide opportunities for UTM students of Bachelor, Master’s and Doctoral Degree to continue their studies at an internationally accepted level, with financial support (performing equipment and scholarships) through the new NATO Science for Peace and Security Programme (SPS) grant G5634 “Advanced Electro-Optical Chemical Sensors” AMOXES at DMIB, FCIM.

These researches reported and appreciated internationally were partially supported by the STCU6229 Project funded by STCU and UTM.

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