Congratulations to Geoffrey Piland and Erik Grumstrup receiving the cover article in JPCA.

The article, "High-Repetition Rate Broadband Pump–Probe Microscopy" can be found at  

https://pubs.acs.org/doi/10.1021/acs.jpca.9b03858

Abstract: Pump–probe microscopy has recently emerged as an important tool for characterizing the effects of nanoscale chemical and compositional heterogeneity on the optoelectronic properties of material systems. This article describes the development of broadband pump–probe microscopy, which utilizes a high-speed line camera and high repetition rate amplified fiber laser to collect full transient spectra at 30+ kHz and with sub 100 fs temporal resolution. The broadband imaging and spectroscopic capabilities of the technique are demonstrated on individual micron-sized lead halide perovskite domains. Also discussed are several challenges associated with collecting broadband transient spectra from sub-micron sample areas, including the importance of careful design of imaging optics to minimize the effects of spherical and chromatic aberrations, detector considerations, and the importance of spot size effects on absolute signal size.

erkg 

Celebrating the 100th Anniversary of the Langmuir Equation

 

This week, the cover of Langmuir has been designed by Erin E. Hanson (Ph.D. graduate student in the Stadie Group) to commemorate the centennial anniversary of Langmuir's equation for interfacial adsorption. We imagine what Dr. Langmuir's chalkboard might have looked like had he measured gas adsorption isotherms on metal-organic frameworks instead of glass, mica, and platinum. For more information about the cover, see https://pubs.acs.org/toc/langd5/35/41 and for a review of Langmuir's legacy on the science of interfaces, see “Langmuir's Theory of Adsorption: A Centennial Review” by Hans Swenson and Nicholas P. Stadie (https://pubs.acs.org/doi/10.1021/acs.langmuir.9b00154).

 

erin