一、讲座信息

报告题目：Insights into the History of Colloidal Quantum Dots–a European Perspective

报告嘉宾：Andrey L. Rogach  Yeung Kin Man Chair Professor at City University of Hong Kong

报告时间：6月20日下午4点

报告地点：吉林大学中心校区唐敖庆楼B521报告厅

二、嘉宾简介

Andrey L. Rogach is a Yeung Kin Man Chair Professor of Photonics Materials at the Department of Materials Science and Engineering, and the Founding Director of the Centre for Functional Photonics (CFP) at City University of Hong Kong. He received his Ph.D. in Physical Chemistry (1995) from the Belarusian State University in Minsk, and worked as a postdoc and then as a staff scientist at the Institute of Physical Chemistry of the University of Hamburg, Germany from 1995 to 2002. From 2002–2009 he held a tenured position of a lead staff scientist at the Department of Physics and Centre for NanoScience of the University of Munich, Germany, where he completed his habilitation in Experimental Physics. He joined City University of Hong Kong as a Full Professor in 2009 and has been advanced to Chair Professor in 2012. His research focuses on synthesis, assembly and optical spectroscopy of colloidal semiconductor and metal nanocrystals and their hybrid structures, and their use for energy-related and optoelectronic applications. He authored over 500 scientific publications with an h-index of 145 {Google Scholar} in these fields that have been extensively (over 75,000) cited, which continuously ranked him as Highly Cited Researcher (Clarivate Analytics) since 2018. Prof. Rogach is a Foreign Member of Academia Europaea. 

三、讲座摘要

This year's Nobel Prize in Chemistry 2023 has been awarded to Moungi Bawendi, Louis Brus, and Alexei Ekimov, for the discovery and synthesis of quantum dots (QDs) ^[1]. According to Brus, “This was a collaborative effort, it’s partly physics, partly chemistry and partly material science”. Since their discovery in the early 1980s, QDs remain a paradigmatic example of the size-dependent properties characteristic of nanoscale materials, and served as a workhorse to promote research and development in the field. The unique electronic and optical properties of QDs can be exquisitely tuned by controlling particle size (down to sub-monolayer differences), in a way that sets the bar for nanomaterial tunability and control ^[2].

A comprehensive review by Efros and Brus in ACS Nano ^[3] traces the evolution of QDs, from their inception in glasses to their advancement through colloid science-based wet-chemistry methods, their experimentally demonstrated and theoretically modeled he optical and electronic properties, and a gamut of technological applications. Both individual QDs and their assemblies have enabled applications in many fields, ranging from fluorescent bioimaging to light emitting diodes, solar cells, and QD TVs.

In this talk, I will offer some personal insights into the history of earlier developments of QDs, from a perspective of a scientist who entered this field in Europe in middle-90ies ^[4,5].   

[1] Semiconductor Nanocrystal Quantum Dots: Synthesis, Assembly, Spectroscopy and Applications. Ed. A. L. Rogach. Springer, Wien-New York, 2008.

[2] L. M. Liz-Marzán, N. Artzi, S. Bals, J. M. Buriak, W. C. W. Chan, X. Chen, M. C. Hersam, I.-D. Kim, J. E. Millstone, P. Mulvaney, W. J. Parak, A. Rogach, R. E. Schaak. Celebrating a Nobel Prize to the “Discovery of Quantum Dots, an Essential Milestone in Nanoscience”. ACS Nano 2023, 17, 19474–19475.

[3] A. L. Efros, L. E. Brus, Nanocrystal Quantum Dots: From Discovery to Modern Development. ACS Nano 2021, 15, 6192-6210.

[4] V. S. Gurin, A. L. Rogach, V. V. Sviridov. Formation of Nanometer Size Silver Sulphide Particles in Colloid Solutions and Polymer Films. Vestsi Akad. Navuk Belarusi, Ser. Khim. Navuk. 1994, 2, 38-42.

[5] A. L. Rogach, L. Katsikas, A. Kornowski, D. Su, A. Eychmüller, H. Weller. Synthesis and Characterization of Thiol-Stabilized CdTe Nanocrystals. Ber. Bunsenges. Phys. Chem. 1996, 100, 1772-1778.