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  • Titanium oxide improves boron nitride photocatalytic degradation of perfluorooctanoic acid 

    Duan, Lijie; Wang, Bo; Heck, Kimberly N.; Clark, Chelsea A.; Wei, Jinshan; (2022)
    Boron nitride (BN) has the newly-found property of degrading recalcitrant polyfluoroalkyl substances (PFAS) under ultraviolet C (UV-C, 254 nm) irradiation. It is ineffective at longer wavelengths, though. In this study, we report the simple calcination of BN and UV-A active titanium oxide (TiO2) creates a BN/TiO2 composite that is more photocatalytically ...
  • Next-generation 2D optical strain mapping with strain-sensing smart skin compared to digital image correlation 

    Meng, Wei; Pal, Ashish; Bachilo, Sergei M.; Weisman, R. Bruce; Nagarajaiah, Satish (2022)
    This study reports next generation optical strain measurement with “strain-sensing smart skin” (S4) and a comparison of its performance against the established digital image correlation (DIC) method. S4 measures strain-induced shifts in the emission wavelengths of single-wall carbon nanotubes embedded in a thin film on the specimen. The new S4 film ...
  • Assembly of planar chiral superlattices from achiral building blocks 

    Cheng, Zhihua; Jones, Matthew R. (2022)
    The spontaneous assembly of chiral structures from building blocks that lack chirality is fundamentally important for colloidal chemistry and has implications for the formation of advanced optical materials. Here, we find that purified achiral gold tetrahedron-shaped nanoparticles assemble into two-dimensional superlattices that exhibit planar chirality ...
  • CO2/carbonate-mediated electrochemical water oxidation to hydrogen peroxide 

    Fan, Lei; Bai, Xiaowan; Xia, Chuan; Zhang, Xiao; Zhao, Xunhua; (2022)
    Electrochemical water oxidation reaction (WOR) to hydrogen peroxide (H2O2) via a 2e− pathway provides a sustainable H2O2 synthetic route, but is challenged by the traditional 4e− counterpart of oxygen evolution. Here we report a CO2/carbonate mediation approach to steering the WOR pathway from 4e− to 2e−. Using fluorine-doped tin oxide electrode in ...
  • A litmus test for classifying recognition mechanisms of transiently binding proteins 

    Chakrabarti, Kalyan S.; Olsson, Simon; Pratihar, Supriya; Giller, Karin; Overkamp, Kerstin; (2022)
    Partner recognition in protein binding is critical for all biological functions, and yet, delineating its mechanism is challenging, especially when recognition happens within microseconds. We present a theoretical and experimental framework based on straight-forward nuclear magnetic resonance relaxation dispersion measurements to investigate protein ...
  • Evaluating the physicochemical effects of conjugating peptides into thermogelling hydrogels for regenerative biomaterials applications 

    Pearce, Hannah A; Jiang, Emily Y; Swain, Joseph W R; Navara, Adam M; Guo, Jason L; (2021)
    Thermogelling hydrogels, such as poly(N-isopropylacrylamide) [P(NiPAAm)], provide tunable constructs leveraged in many regenerative biomaterial applications. Recently, our lab developed the crosslinker poly(glycolic acid)-poly(ethylene glycol)-poly(glycolic acid)-di(but-2-yne-1,4-dithiol), which crosslinks P(NiPAAm-co-glycidyl methacrylate) via ...
  • Fast and parallel nanoscale three-dimensional tracking of heterogeneous mammalian chromatin dynamics 

    Gustavsson, Anna-Karin; Ghosh, Rajarshi P.; Petrov, Petar N.; Liphardt, Jan T.; Moerner, W. E.; (2022)
    Chromatin organization and dynamics are critical for gene regulation. In this work we present a methodology for fast and parallel three-dimensional (3D) tracking of multiple chromosomal loci of choice over many thousands of frames on various timescales. We achieved this by developing and combining fluorogenic and replenishable nanobody arrays, ...
  • Inverted Conformation Stability of a Motor Molecule on a Metal Surface 

    Schied, Monika; Prezzi, Deborah; Liu, Dongdong; Jacobson, Peter; Corni, Stefano; (2022)
    Molecular motors have been intensely studied in solution, but less commonly on solid surfaces that offer fixed points of reference for their motion and allow high-resolution single-molecule imaging by scanning probe microscopy. Surface adsorption of molecules can also alter the potential energy surface and consequently preferred intramolecular ...
  • Exploring the Photophysical Properties of UiO-67 MOF Doped with Rhenium Carbonyl Complexes 

    Ling, Kexin; Ogle, Meredith M.; Flores, Erick; Godoy, Fernando; Martí, Angel A. (2022)
    Directly coordinating transition metal catalysts to the linkers of stable metal organic frameworks (MOFs) is a sleek solution to increasing the longevity of the catalyst. Photoluminescence metal complexes incorporated in MOFs have risen in interest lately. Particularly, Re(bpydc)(CO)3Cl (bpydc = 2,2’-bipyridine-5,5’-dicarboxylic acid) doped zirconium-based ...
  • How Pioneer Transcription Factors Search for Target Sites on Nucleosomal DNA 

    Felipe, Cayke; Shin, Jaeoh; Kolomeisky, Anatoly B.; Center for Theoretical Biological Physics (2022)
    All major biological processes start after protein molecules known as transcription factors detect specific regulatory sequences on DNA and initiate genetic expression by associating to them. But in eukaryotic cells, much of the DNA is covered by nucleosomes and other chromatin structures, preventing transcription factors from binding to their targets. ...
  • Light-activated molecular machines are fast-acting broad-spectrum antibacterials that target the membrane 

    Santos, Ana L.; Liu, Dongdong; Reed, Anna K.; Wyderka, Aaron M.; van Venrooy, Alexis; (2022)
    The increasing occurrence of antibiotic-resistant bacteria and the dwindling antibiotic research and development pipeline have created a pressing global health crisis. Here, we report the discovery of a distinctive antibacterial therapy that uses visible (405 nanometers) light-activated synthetic molecular machines (MMs) to kill Gram-negative and ...
  • A wireless millimetric magnetoelectric implant for the endovascular stimulation of peripheral nerves 

    Chen, Joshua C.; Kan, Peter; Yu, Zhanghao; Alrashdan, Fatima; Garcia, Roberto; (2022)
    Implantable bioelectronic devices for the simulation of peripheral nerves could be used to treat disorders that are resistant to traditional pharmacological therapies. However, for many nerve targets, this requires invasive surgeries and the implantation of bulky devices (about a few centimetres in at least one dimension). Here we report the design ...
  • Investigation into the Re-Arrangement of Copper Foams Pre- and Post-CO2 Electrocatalysis 

    Rudd, Jennifer A.; Hernandez-Aldave, Sandra; Kazimierska, Ewa; Hamdy, Louise B.; Bain, Odin J. E.; (2021)
    The utilization of carbon dioxide is a major incentive for the growing field of carbon capture. Carbon dioxide could be an abundant building block to generate higher-value chemical products. Herein, we fabricated a porous copper electrode capable of catalyzing the reduction of carbon dioxide into higher-value products, such as ethylene, ethanol and ...
  • Thermal annealing effects on palladium-decorated gold nanoparticle catalysts 

    Fang, Yu-Lun; Zhao, Zhun; Heck, Kimberly N.; Pretzer, Lori A.; Guo, Neng; (2022)
    Palladium metal supported on gold in the form of surface ensembles have enhanced catalytic properties compared to monometallic Pd, as exemplified by Pd-decorated Au nanoparticles (Pd-on-Au NPs) for various room-temperature reactions. Whereas the catalytic properties and nanostructure of Pd-on-Au NPs are not known at higher temperatures, this work ...
  • Can we understand the mechanisms of tumor formation by analyzing dynamics of cancer initiation? 

    Teimouri, Hamid; Kolomeisky, Anatoly B.; Center for Theoretical Biological Physics (2022)
    Cancer is a collection of related genetic diseases exhibiting uncontrolled cell growth that interferes with normal functioning of human organisms. It results from accumulation of unfavorable mutations in tissues. While the biochemical picture of how cancer appears is known, the molecular mechanisms of tumor formation remain not fully understood despite ...
  • Versatile acid solvents for pristine carbon nanotube assembly 

    Headrick, Robert J.; Williams, Steven M.; Owens, Crystal E.; Taylor, Lauren W.; Dewey, Oliver S.; (2022)
    Chlorosulfonic acid and oleum are ideal solvents for enabling the transformation of disordered carbon nanotubes (CNTs) into precise and highly functional morphologies. Currently, processing these solvents using extrusion techniques presents complications due to chemical compatibility, which constrain equipment and substrate material options. Here, ...
  • Overcoming mass transfer limitations in cross-linked polyethyleneimine-based adsorbents to enable selective CO2 capture at ambient temperature 

    Hamdy, Louise B.; Gougsa, Abel; Chow, Wing Ying; Russell, James E.; García-Díez, Enrique; (2022)
    New self-supported polyamine CO2 adsorbents are prepared by cross-linking branched polyethyleneimine (PEI) with 2,4,6-tris-(4-bromomethyl-3-fluoro-phenyl)-1,3,5-triazine (4BMFPT). Controlling the degree of cross-linking to ensure abundant free amine functionalities while maintaining a structure conducive to efficient mass transfer is key to accessing ...
  • Nrf2 Modulates the Hybrid Epithelial/Mesenchymal Phenotype and Notch Signaling During Collective Cancer Migration 

    Vilchez Mercedes, Samuel A.; Bocci, Federico; Ahmed, Mona; Eder, Ian; Zhu, Ninghao; (2022)
    Hybrid epithelial/mesenchymal cells (E/M) are key players in aggressive cancer metastasis. It remains a challenge to understand how these cell states, which are mostly non-existent in healthy tissue, become stable phenotypes participating in collective cancer migration. The transcription factor Nrf2, which is associated with tumor progression and ...
  • Interaction of Surface-Modified Alumina Nanoparticles and Surfactants at an Oil/Water Interface: A Neutron Reflectometry, Scattering, and Enhanced Oil Recovery Study 

    Al-Shatty, Wafaa; Campana, Mario; Alexander, Shirin; Barron, Andrew R. (2022)
    The evaluation of the mechanism of nanoparticle (NP)/surfactant complex adsorption at the critical oil/water interface was studied. A sophisticated technique (neutron reflectometry) was used to give a unique insight on NP/oil interactions in oil recovery systems. Herein, the adsorption of two modified alumina NPs with different degrees of hydrophobicity ...
  • DLPacker: Deep learning for prediction of amino acid side chain conformations in proteins 

    Misiura, Mikita; Shroff, Raghav; Thyer, Ross; Kolomeisky, Anatoly B.; Center for Theoretical Biological Physics (2022)
    Prediction of side chain conformations of amino acids in proteins (also termed “packing”) is an important and challenging part of protein structure prediction with many interesting applications in protein design. A variety of methods for packing have been developed but more accurate ones are still needed. Machine learning (ML) methods have recently ...

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