Forskningsseminarier i fysik

Next seminars:

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EXTRA: Lunch seminar series: "What we should teach our students about the scientific method"

Wednesday, 17 April 2024, 12:15-13:00
Where: 21D302 

Wednesday, 15 May 2024, 12:15-13:00
Where: 21D304 

Speaker: Claes Uggla, Department of Engineering and Physics, Karlstad University

Abstract: 

These two seminars are going to be about natural sciences versus cultural sciences. The seminar on April 17 is going to focus on measurements, the relationships between natural science, technology and institutions, and physical stability, where stability and institutions are going to form the bridge to the seminar May 15, which will focus on the different character and purposes of natural and cultural sciences. I will also take the opportunity to connect the seminars with some of the questions in Canvas. 

These two seminars end phase 1 of the seminar series, i.e., the philosophical background. In October phase 2 starts which is going to be i) more interactive and ii) where other participants in the seminar series hopefully will give seminars. To prepare for this I will begin asking questions during the last two seminars, which the participants are encouraged to think about during the summer and perhaps give seminars about, or have open, but prepared, discussions about instead of seminars.

Future seminars in this series:

Autumn 2024

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Tuesday, 23 April 2024, 13:30
Where: 21D302 

Speaker: Dr. Haining Tian, Uppsala University, Sweden

Title: Organic Polymer Dots in Photocatalysis

Abstract:

In recent years, organic polymeric photocatalysts have garnered considerable attention from scientists owing to their cost-effectiveness, adjustable bandgaps and energy levels, and promising performance in photocatalysis. Transforming traditional hydrophobic polymeric photocatalysts into nanoparticles with sizes less than 100 nm, known as polymer dots (Pdots), has demonstrated significantly enhanced photocatalytic activity. Employing a rational design approach to organic polymers stands as one of the strategies aimed at augmenting the photocatalytic efficiency for solar fuels production. Furthermore, the creation of heterojunction Pdots facilitates the efficient separation of photogenerated charges within Pdots and leverages energy transfer processes to enhance light harvesting efficiency. During my talk, I will delve into our research accomplishments, which include optimizing polymer structures for Pdots photocatalysis, understanding the working mechanism, exploring heterojunction Pdots systems, and investigating the applications of Pdots in bio-hybrid photocatalytic systems.

Relevant publications:

[1] Wang L., et al., Angew. Chem., 2016, 128 (40), 12494-12498

[2] Pati P., et al., Energy Environ. Sci., 2017 10 (6), 1372-1376

[3] Liu A., et al., J. Am. Chem. Soc., 2021, 143 (7), 2875-2885

[4] Pavliuk M., et al., J. Am. Chem. Soc. 2022, 144(30) 13600–13611

[5] Wang S., et al., Angew. Chem. Int. Ed., 2022, 61(23), e202202733

[6] Bin C., et al., Angew. Chem. Int. Ed., 2023, 62 (45), e202312276

[7] Axelsson M., et al, JACS Au, 2024, doi:10.1021/jacsau.3c00681