Brenna Bierman

Observation of a superfluid-to-insulator transition of bilayer excitons - Nature Transition of superfluid to insulator is observed in the layer-imbalanced regime of bilayer magnetoexcitons.

Nature research paper: Observation of a superfluid-to-insulator transition of bilayer excitons

go.nature.com/4alOEkf

The duplicates that haunt crystallography databases Researchers call for retraction of two recent <i>Nature</i> studies about AI-generated crystals

Duplicates of crystal structures are flooding databases, implicating repositories hosting organic, inorganic, and computer-generated crystals. The issue raises questions about curation practices at databases and claims around novelty. cen.acs.org/research-int... #chemsky 🧪

YSR!

I think it is also worth mentioning that structures with significant differences can have essentially identical PXRD peak positions. So even if the fit is better, it may not be telling us as much as we think, particularly if the collection is incomplete or the peak intensities do not match.

Superconducting Sn-Intercalated TaSe2: Structural Diversity Obscured by Routine Characterization Techniques Using Sn-intercalated TaSe2 as a model system, we demonstrate the presence of structural heterogeneity captured by single-crystal X-ray diffraction (SCXRD) and scanning transmission electron microscop...

Our work examining SnxTaSe2 is out in @jacs.acspublications.org! From a single intercalated TMD growth composition, we find unexpected structural diversity that is not captured by common characterization techniques. #chemsky 🧪 pubs.acs.org/doi/10.1021/...

"An outstanding accomplishment": The MagLab sets a new world record.
nationalmaglab.org/news-events/...

Bifunctional Catalysis of Aldol Reactions by Foldamer Dihydrazides: Assessment of Conformational Preorganization We previously reported that molecules containing two cyclic hydrazide units connected by a polymethylene linker could catalyze aldol condensations via a bifunctional mechanism. One hydrazide apparentl...

My work assessing the effect of preorganization on dihydrazide activity is out in @jacs.acspublications.org. We find that dihydrazides with flexible tethers can replicate much of the catalytic activity of complex dihydrazides with preorganized foldamer scaffolds. #Chemsky

doi.org/10.1021/jacs...

Controversial quantum-computing paper gets hefty correction — but concerns linger The journal Science has lifted an expression of concern on a paper claiming evidence of Majorana quasiparticles and added new details.

A key study claiming to provide evidence of Majorana quasiparticles has received an extensive correction five years after it was published

go.nature.com/45RK3UE

Versatile Open-Source Photoreactor Architecture for Photocatalysis Across the Visible Spectrum Adoption of commercial photoreactors as standards for photocatalysis research could be limited by high cost. We report the development of the Wisconsin Photoreactor Platform (WPP), an open-source phot...

#chemsky, have you used a Wisconsin Photoreactor? I designed them and will soon defend my PhD. I’d like to include photos of Wisconsin Photoreactors in use by other chemists in my defense. Please share (reply to this post or DM me) a photo of your photoreactor in action!

doi.org/10.1021/acs....

Evidence for Topological States and a Lifshitz Transition in Metastable 2M‐WSe2 This study demonstrates the Fermi surface characteristics and transport properties of 2M-WSe2 bulk single crystals. The measurements and first-principles calculations reveal multiple Fermi pockets wi...

Our work on 2M-WSe2 is out now in Adv. Funct. Mater.!
doi.org/10.1002/adfm...

Hello, could I be added to the feed? I am a chemistry graduate student: orcid.org/0000-0002-45...

Dual Activation Modes Enable Bifunctional Catalysis of Aldol Reactions by Flexible Dihydrazides Hydrazides are known to catalyze reactions of α,β-unsaturated aldehydes via transient iminium formation. The iminium intermediate displays enhanced electrophilicity, which facilitates conjugate additi...

My work on bifunctional organocatalysis of aldol reactions by flexible dihydrazides is out in JACS (@pubs.acs.org). I find that hydrazide units connected by long, flexible linkers offer significant rate enhancement relative to monohydrazides. doi.org/10.1021/jacs... #ChemSky