Melanys

LMR-based sensors in a planar configuration have shown significant potential for biosensing applications. Numerous efforts have been made to enhance the resonance features and, consequently, the performance of these biosensors. However, sensitivity limitations persist in some cases, particularly for applications requiring lower detection limits. To address this, the use of gold nanoparticles is being studied to amplify the sensor's response in LMR sandwich-type assays for the first time, yielding very promising results in the detection of Vascular Endothelial Growth Factor (VEGF), a crucial protein for angiogenesis that is related to tumor growth, as well as cardiovascular, inflammatory, and autoimmune diseases, among others.

Rebeca

The presentation will address topics related to the EHD (electrohydrodynamic printing) printing technique, for the manufacture of sensors based on optical waveguides on rigid or flexible flat substrates. The manufacturing process and the type of materials used are presented. In order to validate the technique in the fabrication of optical sensors, two applications are shown: No-clad waveguide for Breathing Detection and Cladded waveguide using Coaxial Needle for Temperature measurement based on fluorescence.

The first application consists of the fabrication of waveguides on a flat substrate using different materials (NOA61 and PAA). The optical sensitive waveguides manufactured are compact, ensuring coupling with the input and output optical fibers. The response of the printed optical sensor was evaluated to humidity variations, this sensitivity to humidity makes it feasible for use as respiration detection sensors.

The second application demonstrates the fabrication of a temperature optical sensor by printing the corresponding sensitive optical waveguide directly onto a flexible flat substrate. The printed waveguide was carried out using a coaxial needle and an electrohydrodynamic (EHD) machine. The fluorescent organic compound, Rhodamine B, was used for doping the core of the printed waveguide as temperature sensitive dye. The response of the printed optical sensor was evaluated to temperature variations by measurement of both, the peak intensity and the wavelength of the fluorescence spectra. The experimental characteristic and sensitivity of the sensor were obtained.

Mateusz

This seminar will discuss nanocoating deposition methods and advanced materials developed at Warsaw University of Technology and University of South Bohemia to enhance the properties of various optical sensors. Special attention will be given to scalable in manufacturing biosensors and able to operate using minimal volumes on liquids. A subjective review of the most promising optical fiber-based biosensing devices will be presented, focusing on biomolecules of different sizes, such as DNA, proteins, viruses, and bacteria. Finally, highly promising micro and nanostructured fibers designed and manufactured at the Lukasiewicz Research Network - Institute of Microelectronics and Photonics will be introduced and discussed. The talk will be mainly focused on past 3-years achievements, i.e. since my last talk at UPNA. 

Biography:

Mateusz Smietana received his B.Sc., M.Sc., Ph.D. (with distinctions), and D.Sc. in the field of Electronics from Warsaw University of Technology (WUT), Poland, in 2000, 2002, 2007, and 2014, respectively, and Professor Title from President of Poland in September 2022. Since March 2006, he has been working at the Institute of Microelectronics and Optoelectronics, WUT. Since October 2022, he has held the position of Full Professor at WUT. Additionally, since May 2023, he has served as the Leader of Area at the Łukasiewicz Research Network – Institute of Microelectronics and Photonics, Warsaw, Poland and since November 2023 Senior Researcher in University of South Bohemia, Ceske Budejovice, Czech Republic. He was a postdoctoral fellow at Virginia Tech (USA, 2007) and Université du Québec en Outaouais (Canada, 2009-2011), a scholar at Stanford University (USA, 2011) within the Polish TOP500 Innovators Program, and a visiting professor at the Southern University of Science and Technology (China, 2018-2019). He has received scholarships from various Canadian, European, and Chinese institutions, including a scholarship for outstanding young scientists from the Ministry of Science and Higher Education (Poland, 2011). He has led and been the principal investigator in over 20 research projects. He has co-authored more than 200 journal and conference papers, several book chapters, and holds a patent. He has received over 10 scientific awards, including recognition at international invention shows and exhibitions. He has supervised over 40 students at all levels of education. He is currently a mentor supporting project and paper preparation at WUT. His expertise in optical fiber biosensing has been successfully transferred to industry.

Email:

Address:Warsaw, Poland