Lab News – Lee Research Group

Oct. 20, 2025: Single-particle multiphoton fluorescence imaging and spectroscopy and single-particle dark-field spectroscopy capabilities are up and running.

Multiphoton fluorescence microscope setup. This setup will be further updated for our single-particle femtosecond upconversion spectroscopy. We currently have 400 nm diffraction-limited spatial resolution and single-particle sensitivity.

Close up of the home-built microscope. Using as few refractive optics as possible, we maintain ultrashort pulses for femtosecond spectroscopy while maintaining single-particle sensitivity.

Dark-field scattering and transmission microscope. We characterize our plasmonic nanoparticles’ scattering and extinction spectra to study surface chemistry changes and alloying effects.

Feb. 21, 2025: We now have our laser and optical microscope installed. The Spectra Physics Insight X3 will provide tunable ultrashort pulsed excitation for our time-resolved fluorescence upconversion microscope.

Jan. 20, 2025: The laser lab is ready for business. Renovations are complete and optical table is installed.

Jan. 9, 2025: Lee Research Group welcomes new chemistry graduate student Dipto Das! Dipto earned his Bachelor’s and Master’s Degrees in Chemistry at Shahjalal University of Science and Technology. Welcome Dipto!

Dec. 20, 2024: Lee Research Group welcomes new chemistry graduate student Ashfia Tasnim! Ashfia completed her bachelor’s and master’s degrees in Biochemistry and Molecular Biology from Rajshahi University, with a master’s thesis focusing on silver nanoparticles and their biological applications. Welcome Ashfia!