Research Archive
![](https://chem.unc.edu/wp-content/uploads/2021/06/Stretch-Induced-Cavitation-How-Critical-Cavity-Radius-and-Barrier-Energy-Radius-and-Energy-of-a-Stable-Cavity-Depend-on-the-Stretching-Factor.png)
In this work, we study how the characteristics of the cavitation mentioned above scale with the amount of applied tension.
![](https://chem.unc.edu/wp-content/uploads/2021/06/PFOS-dominates-PFAS-composition-in-ambient-fine-particulate-matter-PM2.5-collected-across-North-Carolina-nearly-20-years-after-the-end-of-its-US-production.png)
Thirty-four PFASs, including perfluoroalkyl carboxylic, perfluoroalkane sulfonic, perfluoroalkyl ether carboxylic and sulfonic acids were analyzed by UHPLC/ESI-MS/MS.
![](https://chem.unc.edu/wp-content/uploads/2021/06/Dye-Sensitized-Nonstoichiometric-Strontium-Titanate-Core–Shell-Photocathodes-for-Photoelectrosynthesis-Applications-1.png)
A core–shell approach that utilizes a high-surface-area conducting core and an outer semiconductor shell is exploited here to prepare p-type dye-sensitized solar energy cells that operate with a minimal applied bias.
![](https://chem.unc.edu/wp-content/uploads/2021/06/First-Principles-Demonstration-of-Nonadiabatic-Thouless-Pumping-of-Electrons-in-a-Molecular-System.png)
We demonstrate nonadiabatic Thouless pumping of electrons in trans-polyacetylene in the framework of Floquet engineering using first-principles theory. We identify the regimes in which the quantized pump is operative with respect to the driving electric field for a time-dependent Hamiltonian.
![](https://chem.unc.edu/wp-content/uploads/2021/06/Probing-Carrier-Transport-in-Layered-Perovskites-with-Nonlinear-Optical-and-Photocurrent-Spectroscopies.png)
In this Perspective, we describe the development of several nonlinear optical techniques designed to elucidate the relaxation processes induced by light absorption in layered perovskite systems
![](https://chem.unc.edu/wp-content/uploads/2021/06/Large-Sequence-Defined-Supramolecules-Obtained-by-the-DNA-Guided-Assembly-of-Biohybrid-Polyphosphodiesters.png)
The DNA-guided assembly of biohybrid sequence-defined poly(phosphodiester)s was investigated. These polymers contain long non-natural segments covalently connected to single-stranded DNA sequences. These biohybrid structures were synthesized by automated phosphoramidite chemistry using both nucleoside and abiological phosphoramidite monomers.
![](https://chem.unc.edu/wp-content/uploads/2021/06/Revealing-the-Molecular-Identity-of-Defect-Sites-on-PbS-Quantum-Dot-Surfaces-with-Redox-Active-Chemical-Probes.png)
Herein, we report the application of redox-active chemical probes (E◦′ = −0.48 to −1.9 V vs Fc+/0) coupled with spectroscopic tools (nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), and UV–vis–NIR) to gain insight into the molecular-level nature and reactivity of defects at PbS QD surfaces.
![](https://chem.unc.edu/wp-content/uploads/2021/05/Single-enzyme-electroanalysis.png)
This review details the progress toward the electroanalytical detection and evaluation of single enzyme kinetics largely focused on the nanoimpact method, a chronoamperometric detection strategy that monitors the change in the current-time profile associated with stochastic collisions of freely diffusing entities (e.g., enzymes) onto a microelectrode or nanoelectrode surface.