讲座预告 | 荷兰乌特勒支大学Andries Meijerink教授：Some like it hot! and you do know how hot when they shine

报告题目：Some like it hot! and you do know how hot when they shine

报 告 人：Andries Meijerink 教授（荷兰乌特勒支大学）

邀 请 人：董国平 教授

报告时间：2025年11月10日（周一）下午4:00-5:30

报告地点：北区发光材料与器件全国重点实验室W301会议室

报告摘要：

Luminescence thermometry has rapidly developed in the past decades to a powerful method for remote temperature sensing. More recently, nanothermometry relying on the temperature dependent luminescence of lanthanide ions doped into nanocrystals has emerged, especially in biological applications for accurate sensing and mapping of temperature profiles in the range 270-330 K.1 

In our work, we have extended the temperature range to beyond 900 K by creating temperature stable (upconversion) nanocrystals.2  Here we first discuss fundamental aspects of luminescence thermometry, especially the role of Boltzmann equilibrium and a new theoretical approach to understand and predict the optimum single ion (nano)thermometer.3, 4 Maximizing thermal sensitivity will be demonstrated with real-case examples based on these predictions and a careful analysis actual temperature accuracy that can be realized will be shown to strongly depend on the brightness of the luminescent temperature probes.5 Some pitfalls will also be discussed and warnings will be given!4, 5 All the considerations finally lead to clear guidelines for optimizing ratiometric lanthanide-based luminescent thermometer for a specific application. 

In the second part of the talk examples of the unique capabilities of luminescence nanothermometry will be given, including temperature mapping with μm resolution to probe temperature variation in microheaters used in synchrotron and TEM experiments, temperature sensing in catalytic reactors and applications in microfluidics where measuring temperature variations inside the microchannels is notoriously difficult.2 An outlook will be given towards the future of lanthanide doped nanoparticles temperature sensing.

报告人简介：

Andries Meijerink received his MSc and PhD degree in Chemistry at Utrecht University. After a post-doc in Madison (University of Wisconsin) he returned to Utrecht in 1991. In 1996, at the age of 32, he was appointed at the chair of Solid State Chemistry in the Debye Institute of Utrecht University where he leads an active group in the field of luminescence spectroscopy of quantum dots and lanthanide ions. In the field of lanthanide ions his work involves fundamental research on the energy level structure of both 4fn and 4fn-15d states, energy transfer and finding new concepts related to applications in solar cells, LEDs and scintillators. His research on quantum dots is aimed at unravelling the influence of quantum confinement and surface effects on the electronic structure and exciton dynamics of quantum dots through optical spectroscopy and using the quantum dots as labels in bio-imaging. Research on luminescence of doped nanocrystals integrates the two themes.