We are excited to announce the Summer School on Organic Synthesis under Non-classical Conditions, which will be held at Institute of Organic Chemistry from September 2nd to 6th, this year!
The conference will bring together leading scientists from across Europe to share their latest research on organic synthesis under non-classical conditions.
The Warsaw Doctoral School in Natural and Biomedical Sciences and the Institute of High Pressure Physics PAS cordially invites you to a SPOTLIGHT TALK.
The talk is given by Prof. Eva Monroy (Quantum Photonics, Electronics and Engineering Laboratory, PHELIQS of CEA-Grenoble, France).
When and where?
24th April 2024, 13:00 pm at the IHPP PAS New Technologies Building, Al. Prymasa Tysiąclecia 98, seminar room, 2nd floor Duration: 60 min + more
Abstract
The COVID pandemic triggered a demand for UV lamps for disinfection, which was initially met with low-pressure mercury lamps. Presently, there is a transition towards the use of AlGaN LEDs, which are regarded as a safer and more environmentally sustainable alternative. Despite their advantages, the efficiency and cost-effectiveness of LEDs at 270 nm remain low due to several unsolved challenges, including the optimization of electrical injection. Moreover, the 250-270 nm spectral range, which corresponds to the peak efficiency for disinfection, is associated with risk of cancer and cataracts, prompting research into alternative UV sources with reduced penetration depth, notably within the 220-230 nm spectrum. In this domain, cathodoluminescent UV lamps emerge as a viable solution to obtain substantial radiant power while mitigating associated health risks.
This presentation will focus on the development of efficient UVC emitters by exploring the growth of AlGaN/AlN dots-in-a-wire structures, quantum dot superlattices, and ultrathin GaN/AlN quantum wells using plasma-assisted molecular beam epitaxy. For nanowires, we fine-tune growth conditions to ensure uniform active regions suitable for electron beam interaction. With quantum dots or wells, we optimize aluminum content and growth conditions to achieve strong emission at wavelengths below 230 nm. These nanostructures show internal quantum efficiency higher than 50% and maintain performance under varying pumping power, making them versatile for different device applications.
The Warsaw Doctoral School in Natural and Biomedical Sciences and the Institute of Physics PAS cordially invites you to three ADVANCED LECTURE SERIES – OXIDE MATERIALS FOR OPTOELCTRONICS talks.
Talks are given by prof. dr hab. Leonid Dubrovinsky (University of Bayreuth, Bayreuth, Germany).
When and where?
Talks are divided into three lectures on April 15th, 16th and 17th 2024, each preceded by short introductory talks, at the IP PAS Leonard Sosnovski Auditorium.
The Warsaw Doctoral School in Natural and Biomedical Sciences and the Maria Sklodowska-Curie National Research Institute of Oncology cordially invite you to a SPOTLIGHT TALK.
The talk is presented by William James Becker, PhD (National Institute of Health, National Cancer Institute, Vaccine Branch).
9th, 10th and 11th April 2024, 12:00 pm at the Maria Sklodowska-Curie National Research Institute of Oncology, ul. W.K. Roentgena 5, seminar room im. Prof. Jana Steffena, 4nd floor
Introduction to Flow Cytometry – on 9th April 2024, 12:00
The talk is given by Prof. Markus Winterer (Nanoparticle Process Technology, Faculty of Engineering University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany).
5th April 2024, 12:30 pm at the IHPP PAS New Technologies Building, Al. Prymasa Tysiąclecia 98 Duration: 60 min + more
Heterogenous catalysis is probably the application of nanoscaled materials with the highest economic impact and instrumental in the solution of the energy and climate challenge. Oxides, especially complex oxides, are interesting functional materials for heterogenous catalysis. The property ‘catalytic activity’ is depending on certain particle characteristics (structural features such as primary particle size, fractal dimension, morphology, type and degree of agglomeration) which are directly measurable without additional processing steps.
In this presentation we will show how chemical vapor synthesis (CVS) can be used to generate nanocrystalline oxide particles including complex oxides and how we can control and determine the particle characteristics relevant for heterogenous catalysis [1]. Photocatalytic water splitting using TiO2 and Ga2O3 [2] and thermal oxidation of organic molecules by spinels and perovskites [3, 4] are used as examples.
The Warsaw Doctoral School in Natural and Biomedical Sciences and the Institute of High Pressure Physics PAS cordially invites you to a SPOTLIGHT TALK.
The talk is given by Prof. Markus Winterer (Nanoparticle Process Technology, Faculty of Engineering University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany).
When and where?
3rd April 2024, 12:30 pm at the IHPP PAS New Technologies Building, Al. Prymasa Tysiąclecia 98 Duration: 60 min + more
Although experiments investigating the atomistic structure of disordered materials are facile today through modern instruments for (X-ray) scattering (XS) and spectroscopy (EXAFS) it is still a challenge to extract the relevant information especially in case of very small nanoparticles. In our contribution we will introduce X-ray scattering and X-ray absorption spectroscopy as tools to investigate local and crystal structure of materials and present recent advances in data analysis of this inverse problem using Reverse Monte Carlo (RMC) analysis.
RMC simulations enable the analysis of XS data as well as EXAFS spectra data via partial pair distribution (pPDF) functions obtained from a physical, structural model. In case of nanoparticles and scattering data this approach suffers from the termination of the pPDF’s due to the finite size of the particles. This produces artifacts in the computed scattering intensity due to the long-range probing distance of scattering which are eliminated by using the Debye scattering equation (DSE) for computing the scattering intensity from a particle model. Computational efficiency is provided by binning the distance distribution of atom pairs in the DSE. Simultaneous refinement of XS data and EXAFS spectra of small nanoparticles are thus enabled using a mutual structural model. This method allows the self-consistent extraction of complementary information on local structure contained in EXAFS and long-range order in XS data. We describe this novel method using XS and EXAFS data of nanocrystalline LaFeO3 and SnO2 are presented.
