(Lecture, Oct 26) Schemes for Temperature Read-Out from Luminescence
2018-10-23 readCount:63
Title: Schemes for Temperature Read-Out from Luminescence
Speaker: Prof.Miroslav D. Dramićanin (University of Belgrade)
Venue: Room 402, Building of State Key Laboratory of Luminescent Materials and Devices, Wushan Campus
Time: Oct. 26, Friday, 16:00
 
Abstract:
Temperature sensors comprise a market of USD 5.13 billion (in 2016) and are used across a broad spectrum of human activities, such as in medicine, home appliances, meteorology, agriculture, industry, and military [1]. A significant growth in demand is expected in the near future for contactless temperature sensors, which are not only easy to use, but are less complex and more accurate than contact temperature sensors. For example, there is an immediate need for noncontact thermometry for moving objects or objects which are sensitive to contact, difficult to access, or in hazardous locations [2]. Thermometry based on changes in the optical properties of materials is considered a promising route to meet these needs. Besides the well-known pyrometers and radiation thermometers, of interest are novel optical thermometers based on near-field scanning optical microscopy, Raman scattering, optical interferometry, thermoreflectance, and luminescence spectroscopy. The largest attention among emerging optical methods is in the luminescence thermometry because of the ease of detection of luminescence signal in comparison to other methods, relatively fast response, and a good spatial resolution.
 
This contribution presents the state-of-the art applications of luminescence thermometry, giving a detailed explanation of luminescence spectroscopic schemes for the read-out of temperature [3]. Schemes are classified to as time-integrated and time-resolved ones depending on the temporal nature of the luminescence measurements. The former includes methods based on reading temperatures from the intensity of emission, the ratio of emission intensities, the changes of excitation and emission band positions and widths with temperature, and luminescence anisotropy (polarization). The later includes methods based on measurements of emission decay -times and rise -times. The contribution also presents a comparative analysis of the advantages/disadvantages between of time-integrated and time-resolved temperature read-outs. Examples of temperature read-out schemes are given for different types of materials including phosphors, quantum dots, organic dyes, and luminescent polymers.
 
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Biography:
Prof. Dr. Miroslav D. Dramićanin (born in Belgrade on 23rd July 1966) is the Head of Department for Radiation Chemistry and Physics, Vinča Institute and Full professor of Applied Physics, Faculty of Physics, University of Belgrade, Serbia. He is Adjunct senior scientist at the Houston Center for Biomaterials and Biomimetics, University of Texas at Houston, USA.
He acts as an associate editor of the Optical Materials (Elsevier) and Member of the National Council for Physics of the Republic of Serbia. He is Chairperson of the International Conference on the Physics of Optical Materials and Devices (ICOM) – www.icomonline.org and Member of the Steering Committee of the Association of Italian and Serbian Scientists and Scholars - www.ais3.rs.
 
Prof. Dramićanin has published 1 book, 7 book chapters, and 229 papers in international journals (including papers in the high impact factor journals such as Advanced Materials and ACS Nano). According to Google scholar his papers are cited more than 4800 times. He is leading Optical Materials and Spectroscopy Group (https://www.gammaomas.com) and his research is mainly focused on the synthesis and characterization of lanthanide and transition metal ion activated phosphors and nanophosphors, photocatalytic materials, and physical and chemical sensing using luminescence and luminescent nanoprobes.
 

Announced by School of Matreials Science and Engineering