(Lectures, Apr 25) Nanocrystalline Silicon Based Sensors of Chemical Species
time: 2017-04-24


Title: Nanocrystalline Silicon Based Sensors of Chemical Species
Speaker: Professor Juraj Dian (Charles University in Prague)
Time: 9:30-11:20a.m., Apr 25th, 2017
Venue: Room 105, Shaw Engineering Building, Wushan Campus

Brief introduction to Professor Juraj Dian
Dr. Juraj Dian,Professor of Charles University in Prague, the author or co-author of 70 papers in refereed international journals to which more than 525 references (WOS, without self-citations, 22.2, 2017) appeared in the literature. Professor Dian is the principal investigator of grants GAUK, GAČR and TAČR. Professor Dian’ s professional field include optical properties of nanocrystalline semiconductor materials and organic compounds on solid surfaces (photoluminescence, absorption), nanocrystalline-silicon based optical chemosensors for gas and liquid phases, molecular recognition mechanisms, chemistry of nanocrystalline silicon surface, functionalization and characterization (FTIR microspectroscopy, SEM/HRTEM), electrochemistry of silicon, spectroelectrochemistry of porphyrin and organometallic systems, and industrial applications of chemosensors arrays for gas phase detection.
Title 1: High Education in the Czech Republic
Abstract:
The lecture presents basic information about the high education system in the Czech Republic and in more details the education at the Charles University in Prague, the first rank national university. Particular emphasis will be given to the lecturer’s own experience with teaching of chemistry and physics at the Charles University during the thirty years.
Title 2: Nanocrystalline Silicon Based Sensors of Chemical Species
Abstract:
The lecture introduces main information about the nanocrystalline silicon physical properties and the applications of visible room temperature photoluminescence for sensing of chemical species in gas and liquid phases.  The preparation of silicon nanocrystals will be focused on the electrochemical etching process of crystalline silicon in HF based electrolytes and the formation of porous silicon. Morphology of porous silicon is especially suitable for sensing of chemical species. Photoluminescence changes in the presence of selected organic compounds in the gas and liquid phase and the mechanism of the sensor response will be presented. Finally a potential industrial application of porous silicon photoluminescence based sensor field for brewery industry in the Czech Republic will be described.