"Bioconjugation Strategies for Tobacco Mild Green Mosaic Virus", Ivonne González-Gamboa, Adam A. Caparco, Justin M. McCaskill, Nicole F. Steinmetz. ChemBioChem 23, e202200323 (2022). DOI: 10.1002/cbic.202200323
"Digital Light Processing of Dynamic Bottlebrush Materials", Chungryong Choi, Yoichi Okayama, Parker T. Morris, Lindsay L. Robinson, Matthias Gerst, Joshua C. Speros, Craig J. Hawker, Javier Read de Alaniz, Christopher M. Bates. Adv. Funct. Mater. 32, 2200883 (2022). DOI: 10.1002/adfm.202200883
"Colloidal Platinum–Copper Nanocrystal Alloy Catalysts Surpass Platinum in Low-Temperature Propene Combustion", Nadia Tahsini, An-Chih Yang, Verena Streibel, Baraa Werghi, Emmett D. Goodman, Aisulu Aitbekova, Simon R. Bare, Yuejin Li, Frank Abild-Pedersen, Matteo Cargnello. J. Am. Chem. Soc. 144, 1612–1621 (2022). DOI: 10.1021/jacs.1c10248
"Microkinetic Modeling of Propene Combustion on a Stepped, Metallic Palladium Surface and the Importance of Oxygen Coverage", Verena Streibel, Hassan A. Aljama, An-Chih Yang, Tej S. Choksi, Roel S. Sánchez-Carrera, Ansgar Schäfer, Yuejin Li, Matteo Cargnello, and Frank Abild-Pedersen. ACS Catal. 12, 1742–1757 (2022). DOI: 10.1021/acscatal.1c03699
"Ligand-Free Processable Perovskite Semiconductor Ink", Maria C. Folgueras, Sheena Louisia, Jianbo Jin, Alexandra Du, Sirine C. Fakra, Rui Zhang, Fabian Seeler, Kerstin Schierle-Arndt, Peidong Yang. Nano Lett. 21, 8856–8862 (2021). DOI: 10.1021/acs.nanolett.1c03308
"Polymer-Conjugated Carbon Nanotubes for Biomolecule Loading", Christopher T. Jackson, Jeffrey W. Wang, Eduardo González-Grandío, Natalie S. Goh, Jaewan Mun, Sejal Krishnan, Florian Ludwig Geyer, Harald Keller, Sophia Ebert, Kian Molawi, Nadine Kaiser, Markita P. Landry. ACS Nano 16, 1802–1812 (2021). DOI: 10.1021/acsnano.1c06343
"Carbon Nanotube Biocompatibility in Plants is Determined by Their Surface Chemistry", Eduardo González-Grandío, Gözde S. Demirer, Christopher T. Jackson, Darwin Yang, Sophia Ebert, Kian Molawi, Harald Keller, Markita P. Landry. J. Nanobiotechnol. 19, 431 (2021). DOI: 10.1186/s12951-021-01178-8
"Support Acidity Improves Pt Activity in Propane Combustion in the Presence of Steam by Reducing Water Coverage on the Active Sites", An-Chih Yang, Haiyang Zhu, Yuejin Li, and Matteo Cargnello. ACS Catal. 11, 6672–6683 (2021). DOI: 10.1021/acscatal.1c01280
"Insights and comparison of structure–property relationships in propane and propene catalytic combustion on Pd- and Pt-based catalysts", An-Chih Yang, Verena Streibel, Tej S. Choksi, Hassan Aljama, Baraa Werghi, Simon R. Bare, Roel S. Sánchez-Carrera, Ansgar Schäfer, Yuejin Li, Frank Abild-Pedersen, Matteo Cargnello. J. Catal. 401, 89-101 (2021). DOI: 10.1016/j.jcat.2021.06.018
"Entrepreneurship in Polymer Chemistry", Katrina M. Knauer*, Joshua C. Speros*, Lisa K. Kemp, Daniel A. Savin, Zhenan Bao, Geoffrey W. Coates, Thomas H. Epps III, Craig J. Hawker, Jennifer J. Le Roy, Molly Morse, and Oliver Yu. ACS Macro Lett. 10, 864-872 (2021). DOI: 10.1021/acsmacrolett.1c00303
"Light-Mediated Synthesis and Reprocessing of Dynamic Bottlebrush Elastomers under Ambient Conditions", Chungryong Choi, Jeffrey L. Self, Yoichi Okayama, Adam E. Levi, Matthias Gerst, Joshua C. Speros, Craig J. Hawker, Javier Read de Alaniz, and Christopher M. Bates. J. Am. Chem. Soc. 143, 9866–9871 (2021). DOI: 10.1021/jacs.1c03686
"A New Perspective and Design Principle for Halide Perovskites: Ionic Octahedron Network (ION)", Jianbo Jin, Maria C. Folgueras, Mengyu Gao, Sunmoon Yu, Sheena Louisia, Ye Zhang, Li Na Quan, Chubai Chen, Rui Zhang, Fabian Seeler, Kerstin Schierle-Arndt, and Peidong Yang. Nano Lett., 21, 5415–5421 (2021). DOI: 10.1021/acs.nanolett.1c01897
"Molecularly Informed Field Theories from Bottom-up Coarse-Graining", Nicholas Sherck, Kevin Shen, My Nguyen, Brian Yoo, Stephan Köhler, Joshua C. Speros, Kris T. Delaney, M. Scott Shell, and Glenn H. Fredrickson. ACS Macro Lett., 10, 576-583 (2021). DOI: 10.1021/acsmacrolett.1c00013
"Renewable Polyurethanes from Sustainable Biological Precursors", Thien An Phung Hai, Marissa Tessman, Nitin Neelakantan, Anton A. Samoylov, Yuri Ito, Bhausaheb S. Rajput, Naser Pourahmady, and Michael D. Burkart. Biomacromolecules, 22, 1770–1794 (2021). DOI: 10.1021/acs.biomac.0c01610
"Stencil-printed Lithium-ion micro batteries for IoT applications", Anju Toor, Albert Wen, Filip Maksimovic, Abhinav M. Gaikwad, Kristofer S.J. Pister, and Ana C.Arias. Nano Energy, 82, 105666 (2021). DOI: 10.1016/j.nanoen.2020.105666
"Oxalohydrazide Ligands for Copper‐Catalyzed C−O Coupling Reactions with High Turnover Numbers", Ritwika Ray and John F. Hartwig. Angew. Chem. Int. Ed., 60, 8203-8211 (2021). DOI: 10.1002/anie.202015654
"A Modular Strategy for Functional Pressure Sensitive Adhesives", Kyueui Lee, Brylee David B. Tiu, Valentin Martchenko, Kristene Mai, Goun Lee, Matthias Gerst, and Phillip B. Messersmith. ACS Appl. Mater. Interfaces, 13, 3161–3165 (2021). DOI: 10.1021/acsami.0c19405
"Stability of boron-doped mesoporous SiC with high surface area in water-saturated air at 800 °C for diesel exhaust catalysis", Meng Hao Lee, Xiaojun Zeng, Fengru Fan, Siqiao Yin, Olga Gerlach, Stephan Zuend, and Galen D.Stucky. J. Solid State Chem., 294, 121905 (2021). DOI: 10.1016/j.jssc.2020.121905
"Cross‐Coupling between Hydrazine and Aryl Halides with Hydroxide Base at Low Loadings of Palladium by Rate‐Determining Deprotonation of Bound Hydrazine", Dr. Justin Y. Wang, Dr. Kyoungmin Choi, Dr. Stephan J. Zuend, Dr. Kailaskumar Borate, Dr. Harish Shinde, Dr. Roland Goetz, and Prof. John F. Hartwig. Angew. Chem. Int. Ed., 60, 399-408 (2021). DOI: 10.1002/anie.202011161
"Learning composition-transferable coarse-grained models: Designing external potential ensembles to maximize thermodynamic information", Kevin Shen, Nicholas Sherck, My Nguyen, Brian Yoo, Stephan Köhler, Joshua Speros, Kris T. Delaney, Glenn H. Fredrickson, and M. Scott Shell. J. Chem. Phys.,153, 154116 (2020). DOI: 10.1063/5.0022808
"Li5VF4(SO4)2: A Prototype High-Voltage Li-Ion Cathode", Rebecca C. Vincent, Pratap Vishnoi, Molleigh B. Preefer, Jimmy-Xuan Shen, Fabian Seeler, Kristin A. Persson, and Ram Seshadri. ACS Appl. Mater. Interfaces, 12, 48662–48668 (2020). DOI: 10.1021/acsami.0c14781
"Food-Grade Microscale Dispersion Enhances UV Stability and Antimicrobial Activity of a Model Bacteriophage (T7) for Reducing Bacterial Contamination (Escherichia coli) on the Plant Surface", Kang Huang and Nitin Nitin. J. Agric. Food Chem., 68, 10920–10927 (2020). DOI: 10.1021/acs.jafc.0c02795
"Robust Vapor-Deposited Antifouling Fluoropolymer Coatings for Stainless Steel Polymerization Reactor Components", Nareh Movsesian, Sabine Hirth, Joshua Speros, and Malancha Gupta. Ind. Eng. Chem. Res., 59, 15264–15270 (2020). DOI: 10.1021/acs.iecr.0c02646
"Revealing the structure of a catalytic combustion active-site ensemble combining uniform nanocrystal catalysts and theory insights", An-Chih Yang, Tej Choksi, Verena Streibel, Hassan Aljama, Cody J. Wrasman, Luke T. Roling, Emmett D. Goodman, Dionne Thomas, Simon R. Bare, Roel S. Sánchez-Carrera, Ansgar Schäfer, Yuejin Li, Frank Abild-Pedersen, and Matteo Cargnello. Proc. Natl. Acad. Sci. U.S.A., 117, 14721-14729 (2020). DOI: 10.1073/pnas.2002342117
"Cooperativity of Catechols and Amines in High Performance Dry/Wet Adhesives", Brylee David B. Tiu, Peyman Delparastan, Max R Ney, Matthias Gerst, and Phillip Messersmith. Angew. Chem. Int. Ed., 59, 16616-16624 (2020). DOI: 10.1002/anie.202005946
"Morphology-controlled transformation of Cu@Au core−shell nanowires into thermally stable Cu3Au intermetallic nanowires", Zhiqiang Niu*, Shouping Chen*, Yi Yu, Teng Lei, Ahmad Dehestani, Kerstin Schierle-Arndt, and Peidong Yang. Nano Res., 13, 2564–2569 (2020). DOI: 10.1007/s12274-020-2900-z
"Preparation of Mono- and Diisocyanates in Flow from Renewable Carboxylic Acids", Thien An Phung Hai, Laurent J. S. De Backer, Nicholas D. P. Cosford, and Michael D. Burkart. Org. Process Res. Dev., 24, 2342–2346 (2020). DOI: 10.1021/acs.oprd.0c00167
"Lead-free Cesium Europium Halide Perovskite Nanocrystals", Jianmei Huang, Teng Lei, Martin Siron, Ye Zhang, Sunmoon Yu, Fabian Seeler, Ahmad Dehestani, Li Na Quan, Kerstin Schierle-Arndt, Peidong Yang. Nano Letters, 20, 3734–3739 (2020). DOI: 10.1021/acs.nanolett.0c00692
"2’-fucosyllactose Supplementation Improves Gut-Brain Signaling and Diet-Induced Obese Phenotype and Changes the Gut Microbiota in High Fat-Fed Mice", Sunhye Lee, Michael Goodson, Wendie Vang, Karen Kalanetra, Daniela Barile, and Helen Raybould. Nutrients, 12, 1003 (2020). DOI: 10.3390/nu12041003
"Multiple nanoemulsions", Tanvi Sheth, Serena Seshadri, Tamás Prileszky, and Matthew E. Helgeson. Nat. Rev. Mater., 5, 214–228 (2020). DOI: 10.1038/s41578-019-0161-9
"Palladium-catalyzed oxidation of β-C(sp3)-H bond of primary alkylamines through a rare four-membered palladacycle intermediate", Bo Su, Ala Bunescu, Yehao Qiu, Stephan J. Zuend, Martin Ernst, and John F. Hartwig. J. Am. Chem. Soc., 142, 7912–7919 (2020). DOI: 10.1021/jacs.0c01629
"Molecular Oxygen Activation on Suspended Doped Cerium(IV) Oxide Particles in Molten Chloride Salts", Behzad Tangeysh, Horia Metiu, Michael J. Gordon, Eric W. McFarland. Catalysis Letters, 150, 273-280 (2020). DOI: 10.1007/s10562-019-02942-0
"Depletion of microbiome-derived molecules in the host using Clostridium genetics ", Chun-Jun Guo, Breanna M. Allen, Kamir J. Hiam, Dylan Dodd, Will Van Treuren, Steven Higginbottom, Kazuki Science Magazine, Vol.366, issue6471, eaav1282 (2019). DOI: 10.1126/science.aav1282
"Rapid and Tunable Assisted-Microwave Preparation of Glass and Glass-Ceramic Thiophosphate “Li7P3S11” Li-Ion Conductors", Molleigh B. Preefer, Jason H. Grebenkemper, Franziska Schroeder, Joshua D. Bocarsly, Kartik Pilar, Joya A. Cooley, William Zhang, Jerry Hu, Sumohan Misra, Fabian Seeler, Kerstin Schierle-Arndt, and Ram Seshadri. ACS Appl. Mater. Interfaces, 11, 45, 42280-42287 (2019). DOI: 10.1021/acsami.9b15688
"Computational Discovery of the Origins of Life", Jan MeisnerXiaolei Zhu, and Todd J. Martínez. Catalysis Letters, 150, 273-280 (2020). DOI: 10.1007/s10562-019-02942-0
"Protecting the Nanoscale Properties of Ag Nanowires with a Solution-Grown SnO2 Monolayer as Corrosion Inhibitor", Yang Zhao, Xijun Wang, Shize Yang, Elisabeth Kuttner, Aidan A. Taylor, Reza Salemmilani, Xin Liu, Martin Moskovits, Binghui Wu, Ahmad Dehestani, Jian-Feng Li, Matthew F. Chisholm, Zhong-Qun Tian, Feng-Ru Fan, Jun Jiang, and Galen D. Stucky. J. Am. Chem. Soc., 14, 135, 13977-13986 (2019). DOI: 10.1021/jacs.9b07172
"Parallel Worlds Meet at Designed Interfaces with a Vast Number of Potential Frameworks", Zhe Ji and Omar M. Yagh. Biochemistry, 58, 3823–3824 (2019). DOI: 10.1021/acs.biochem.9b00747
"Variability of Targeted Material Thermal Responses to Laser-Induced Heating in Additive Manufacturing", T. I. Zohdi and N. Castrillon. J. Manuf. Sci. Eng, 141, 081012 (2019). DOI: 10.1115/1.4043981
"Enhanced Adhesion and Cohesion of Bioinspired Dry/Wet Pressure Sensitive Adhesives", Brylee David Buada TiuPeyman DelparastanMax Raymond NeyMatthias GerstPhillip B. Messersmith. ACS Appl. Mater. Interfaces , 11, 28296–28306 (2019). DOI: 10.1021/acsami.9b08429
"Molecular Insights into Carbon Dioxide Sorption in Hydrazone- Based Covalent Organic Frameworks with Tertiary Amine Moieties", Kerstin Gottschling, Linus Stegbauer, Gökcen Savasci, Nathan A Prisco, Zachariah J Berkson, Christian Ochsenfeld, Bradley F Chmelka, and Bettina V Lotsch. Chem. Mater., 31, 1946–1955 (2019). DOI: 10.1021/acs.chemmater.8b04643
"Systematic Engineering of a Protein Nanocage for High-Yield, Site- Specific Modification.", Emily C Hartman, Marco J Lobba, Andrew H Favor, Stephanie A Robinson, Matthew B Francis, and Danielle Tullman-Ercek. J. Am. Chem. Soc., 141, 3875–3884 (2019). DOI: 10.1021/jacs.8b10734
"Experimental Evaluation of Coevolution in a Self-Assembling Particle.", Emily C Hartman, Marco J Lobba, Andrew H Favor, Stephanie A Robinson, Matthew B Francis, and Danielle Tullman-Ercek. Biochemistry, 58, 1527–1538 (2018). DOI: 10.1021/acs.biochem.8b00948
"Enzymatic Modification of N-Terminal Proline Residues Using Phenol Derivatives.", Johnathan C Maza, Daniel L V Bader, Lifeng Xiao, Alan M Marmelstein, Daniel D Brauer, Adel M ElSohly, Matthew J Smith, Shane W Krska, Craig A Parish, and Matthew B Francis. J. Am. Chem. Soc., 141, 3885–3892 (2019). DOI: 10.1021/jacs.8b10845
"Self-Assembling Micelles Based on an Intrinsically Disordered Protein Domain.", Sarah H Klass, Matthew J Smith, Tahoe A Fiala, Jess P Lee, Anthony O Omole, Bong-Gyoon Han, Kenneth H Downing, Sanjay Kumar, and Matthew B Francis. J. Am. Chem. Soc., 141, 4291–4299 (2019). DOI: 10.1021/jacs.8b10688
"Colloidal Nanocrystals as Building Blocks for Well-Defined Heterogeneous Catalysts", Matteo Cargnello. Chem. Mater. , 31, 576–596 (2019). DOI: 10.1021/acs.chemmater.8b04533
"Edible bacteriophage based antimicrobial coating on fish feed for enhanced treatment of bacterial infections in aquaculture industry", Kang Huang and Nitin Nitin. Aquaculture , 502, 18–25 (2018). DOI: 10.1021/acs.chemmater.8b04533
"Effects of Polymer Coatings on Electrodeposited Lithium Metal", Jeffrey Lopez, Allen Pei, Jin Young Oh, Ging-Ji Nathan Wang, Yi Cui, and Zhenan Bao. J. Am. Chem. Soc. , 140, 11735–11744 (2018). DOI: 10.1021/jacs.8b06047
"Microbiome: Focus on Causation and Mechanism.", M. A. Fischbach. Cell., 174, 785–790 (2018). DOI: 10.1016/j.cell.2018.07.0
There is tremendous enthusiasm for the microbiome in academia and industry. This Perspective argues that in order to realize its potential, the field needs to focus on establishing causation and molecular mechanism with an emphasis on phenotypes that are large in magnitude, easy to measure, and unambiguously driven by the microbiota.
"Chlorine Production by HCl Oxidation in a Molten Chloride Salt Catalyst", Shizhao Su, Davide Mannini, Horia Metiu, Michael J Gordon, and Eric W McFarland. Industrial & Engineering Chemistry Research, 57, 7795–7801 (2018). DOI: 10.1021/acs.iecr.8b01141
"Synthesis of Silver Nanowires with Reduced Diameters Using Benzoin-Derived Radicals to Make Transparent Conductors with High Transparency and Low Haze", Zhiqiang Niu, Fan Cui, Elisabeth Kuttner, Chenlu Xie, Hong Chen, Yuchun Sun, Ahmad Dehestani, Kerstin Schierle-Arndt, and Peidong Yang. Nano Lett., 18, 5329–5334 (2018). DOI: 10.1021/acs.nanolett.8b02479
"A molecular cross-linking approach for hybrid metal oxides.", Dahee Jung, Liban M A Saleh, Zachariah J Berkson, Maher F El-Kady, Jee Youn Hwang, Nahla Mohamed, Alex I Wixtrom, Ekaterina Titarenko, Yanwu Shao, Kassandra McCarthy, Jian Guo, Ignacio B Martini, Stephan Kraemer, Evan C Wegener, Philippe Saint-Cricq, Bastian Ruehle, Ryan R Langeslay, Massimiliano Delferro, Jonathan L Brosmer, Christopher H Hendon, Marcus Gallagher-Jones, Jose Rodriguez, Karena W Chapman, Jeffrey T Miller, Xiangfeng Duan, Richard B Kaner, Jeffrey I Zink, Bradley F Chmelka, and Alexander M Spokoyny. Nat Mater. 17, 341–348 (2018). DOI: 10.1038/s41563-018-0021-9
"Quantitative characterization of all single amino acid variants of a viral capsid-based drug delivery vehicle.", Emily C Hartman, Christopher M Jakobson, Andrew H Favor, Marco J Lobba, Ester Álvarez-Benedicto, Matthew B Francis, and Danielle Tullman-Ercek. Nature Communications 1–11 (2018). DOI: 10.1038/s41467-018-03783-y/a>
"Rapid Microwave Preparation and Composition Tuning of the High-Performance Magnetocalorics (Mn,Fe) 2(P,Si)",
Jason H Grebenkemper, Joshua D Bocarsly, Emily E Levin, Gareth Seward, Colin Heikes, Craig Brown, Sumohan Misra, Fabian Seeler, Kerstin Schierle-Arndt, Stephen D Wilson, and Ram Seshadri. ACS applied materials & interfaces. 10, 7208–7213 (2018). DOI: 10.1021/acsami.7b16988
"Assessing Local Structure Motifs Using Order Parameters for Motif Recognition, Interstitial Identification, and Diffusion Path Characterization.", Nils E R Zimmermann, Matthew K Horton, Anubhav Jain, and Maciej Haranczyk. Front. Mater. 4, 054104–13 (2017). DOI: 10.1016/j.chembiol.2015.09.008
"Hydrogen Gas-Mediated Deoxydehydration/Hydrogenation of Sugar Acids: Catalytic Conversion of Glucarates to Adipates", Reed T Larson, Andrew Samant, Jianbin Chen, Woojin Lee, Martin A Bohn, Dominik M Ohlmann, Stephan J Zuend, and F Dean Toste. J. Am. Chem. Soc. 139, 14001–14004 (2017). DOI: 10.1021/jacs.7b07801
"Solution-Processed Complementary Resistive Switching Arrays for Associative Memory", Jeremy Smith, Seungjun Chung, Jaewon Jang, Carlos Biaou, and Vivek Subramanian. IEEE Trans. Electron Devices. 64, 4310–4316 (2017). DOI: 10.1109/TED.2017.2732920
Complementary resistive switches (CRS) based on back-to-back nanofilamentary resistive RAM devices have been fabricated by an all-solution-processed method, employing inkjet-printed Ag and Au contacts and a spin-coated sol–gel zirconium oxide dielectric layer. The devices demonstrate electrical switching behavior below 3 V, stable on-state windows, reasonable cycle lifetimes, and can be implemented in 2×2 memory arrays with no crosstalk during addressing. For reliable operation and high yields of the CRS devices, printing and annealing processes were carefully optimized to eliminate the coffee- ring effect on the bottom electrode, and produce a pin-hole free dielectric. The arrays are fully pulse programmable and are able to retain their state for >104 s. Additionally, the arrays can be operated as associative or content addressable, memory for pattern matching applications, which is demonstrated through a basic hamming distance mapping measurement for different stored data states.
"Electrostatic Tuning of Spray-Deposited ZnO for Controlled Mobility Enhancement", Andre Zeumault, William Scheideler, and Vivek Subramanian. Adv. Funct. Mater. 40, 1701021–10 (2017). DOI: 10.1002/adfm.201701021
Spray-deposited nanocrystalline ZnO films are produced in order to establish empirical relationships between synthetic conditions and the density of states as a means of achieving electrostatic control. By varying the spray-pyrolysis deposition conditions, i.e., substrate temperature, precursor concentration, and flow rate, a wide range of exponentially distributed density of localized states profiles and field-effect mobility values ranging over three orders of magnitude (0.02–30 cm2 V−1 s−1) are obtained for analysis. It is found that mobility can be controlled by appropriately tuning the shape of the density of states profile, increasing the band tail slope and reducing the band edge concentration of shallow states. Most significantly, it is shown that the shape of the density of states can be modified by adjusting the spray-pyrolysis deposition conditions for electrostatic control. It is found that higher Zn precursor concentration in solution increases the slope of the band tails, leading to higher mobility. Additionally, the band edge concentration is reduced with increased substrate temperature also leading to higher mobility. These results quantify the relationship between defect electrostatics and electron transport while demonstrating electrostatic control via synthetic modification of localized states.
"Benzoin Radicals as Reducing Agent for Synthesizing Ultrathin Copper Nanowires", Fan Cui, Letian Dou, Qin Yang, Yi Yu, Zhiqiang Niu, Yuchun Sun, Hao Liu, Ahmad Dehestani, Kerstin Schierle-Arndt, and Peidong Yang. J. Am. Chem. Soc., 139, 3027–3032 (2017). DOI: 10.1021/jacs.6b11900
In this work, we report a new, general synthetic approach that uses heat driven benzoin radicals to grow ultrathin copper nanowires with tunable diameters. This is the first time carbon organic radicals have been used as a reducing agent in metal nanowire synthesis. In-situ temperature dependent electron paramagnetic resonance (EPR) spectro- scopic studies show that the active reducing agent is the free radicals produced by benzoins under elevated temperature. Furthermore, the reducing power of benzoin can be readily tuned by symmetrically decorating functional groups on the two benzene rings. When the aromatic rings are modified with electron donating (withdrawing) groups, the reducing power is promoted (suppressed). The controllable reactivity gives the carbon organic radical great potential as a versatile reducing agent that can be generalized in other metallic nanowire syntheses.
"Ultrathin Epitaxial Cu@Au Core–Shell Nanowires for Stable Transparent Conductors. ", Zhiqiang Niu*, Fan Cui*, Yi Yu, Nigel Becknell, Yuchun Sun, Garo Khanarian, Dohyung Kim, Letian Dou, Ahmad Dehestani, Kerstin Schierle-Arndt, and Peidong Yang. J. Am. Chem. Soc.,139, 7348−7354 (2017). DOI: 10.1021/jacs.7b02884
"Discovery of Reactive Microbiota-Derived Metabolites that Inhibit Host Proteases", Chun-Jun Guo, Fang-Yuan Chang, Thomas P Wyche, Keriann M Backus, Timothy M Acker, Masanori Funabashi, Mao Taketani, Mohamed S Donia, Stephen Nayfach, Katherine S Pollard, Charles S Craik, Benjamin F Cravatt, Jon Clardy, Christopher A Voigt, and Michael A Fischbach. Cell. 168, 517–526.e18 (2017). DOI: 10.1016/j.cell.2016.12.021
The gut microbiota modulate host biology in numerous ways, but little is known about the molecular mediators of these interactions. Previously, we found a widely distributed family of nonribosomal peptide synthetase gene clusters in gut bacteria. Here, by expressing a subset of these clusters in Escherichia coli or Bacillus subtilis, we show that they encode pyrazinones and dihydropyrazinones. At least one of the 47 clusters is present in 88% of the National Institutes of Health Human Microbiome Project (NIH HMP) stool samples, and they are transcribed under conditions of host colonization. We present evidence that the active form of these molecules is the initially released peptide aldehyde, which bears potent protease inhibitory activity and selectively targets a subset of cathepsins in human cell proteomes. Our findings show that an approach combining bioinformatics, synthetic biology, and heterologous gene cluster expression can rapidly expand our knowledge of the metabolic potential of the microbiota while avoiding the challenges of cultivating fastidious commensals.
"Synthesis of Pt3Y and Other Early−Late Intermetallic Nanoparticles by Way of a Molten Reducing Agent", Jacob S Kanady, Peter Leidinger, Andreas Haas, Sven Titlbach, Stephan Schunk, Kerstin Schierle-Arndt, Ethan J Crumlin, Cheng Hao Wu, and A Paul Alivisatos. J. Am. Chem. Soc. 139, 5672–5675 (2017). DOI: 10.1021/jacs.7b01366
Early−late intermetallic phases have gar- nered increased attention recently for their catalytic properties. To achieve the high surface areas needed for industrially relevant applications, these phases must be synthesized as nanoparticles in a scalable fashion. Herein, Pt3Y targeted as a prototypical example of an early−late intermetallic has been synthesized as nanoparticles approximately 5−20 nm in diameter via a solution process and characterized by XRD, TEM, EDS, and XPS. The key development is the use of a molten borohydride (MEt3BH, M = Na, K) as both the reducing agent and reaction medium. Readily available halide precursors of the two metals are used. Accordingly, no organic ligands are necessary, as the resulting halide salt byproduct prevents sintering, which further permits dispersion of the nano- scale intermetallic onto a support. The versatility of this approach was validated by the synthesis of other intermetallic phases such as Pt3Sc, Pt3Lu, Pt2Na, and Au2Y.
"A gut bacterial pathway metabolizes aromatic amino acids into nine circulating metabolites", Dylan Dodd, Matthew H Spitzer, William Van Treuren, Bryan D Merrill, Andrew J Hryckowian, Steven K Higginbottom, Le Anthony, Tina M Cowan, Garry P Nolan, Michael A Fischbach, and Justin L Sonnenburg. Nature. 336, 1262 (2017). DOI: 10.1038/nature24661
The human gut microbiota produces dozens of metabolites that accumulate in the bloodstream, where they can have systemic effects on the host. Although these small molecules commonly reach concentrations similar to those achieved by pharmaceutical agents, remarkably little is known about the microbial metabolic pathways that produce them. Here we use a combination of genetics and metabolic profiling to characterize a pathway from the gut symbiont Clostridium sporogenes that generates aromatic amino acid metabolites. Our results reveal that this pathway produces twelve compounds, nine of which are known to accumulate in host serum. All three aromatic amino acids (tryptophan, phenylalanine and tyrosine) serve as substrates for the pathway, and it involves branching and alternative reductases for specific intermediates. By genetically manipulating C. sporogenes, we modulate serum levels of these metabolites in gnotobiotic mice, and show that in turn this affects intestinal permeability and systemic immunity. This work has the potential to provide the basis of a systematic effort to engineer the molecular output of the gut bacterial community.
"Mobility Enhancement in Solution‐Processed Transparent Conductive Oxide TFTs due to Electron Donation from Traps in High‐k Gate Dielectrics", Andre Zeumault and Vivek Subramanian. Adv. Funct. Mater., 26: 955–963. doi:10.1002/adfm.201503940
"Protein Sialylation Regulates a Gene Expression Signature that Promotes Breast Cancer Cell Pathogenicity", Rebecca A Kohnz, Lindsay S Roberts, David DeTomaso, Lara Bideyan, Peter Yan, Sourav Bandyopadhyay, Andrei Goga, Nir Yosef, and Daniel K Nomura. ACS Chem. Biol. 11, 2131–2139 (2016). DOI: 10.1021/acschembio.6b00433
Many mechanisms have been proposed for how heightened aerobic glycolytic metabolism fuels cancer pathogenicity, but there are still many unexplored pathways. Here, we have performed metabolomic profiling to map glucose incorporation into metabolic pathways upon transformation of mammary epithelial cells by 11 commonly mutated human oncogenes. We show that transformation of mammary epithelial cells by oncogenic stimuli commonly shunts glucose-derived carbons into synthesis of sialic acid, a hexosamine pathway metabolite that is converted to CMP-sialic acid by cytidine monophosphate N-acetylneuraminic acid synthase (CMAS) as a precursor to glycoprotein and glycolipid sialylation. We show that CMAS knockdown leads to elevations in intracellular sialic acid levels, a depletion of cellular sialylation, and alterations in the expression of many cancer-relevant genes to impair breast cancer pathogenicity. Our study reveals the heretofore unrecognized role of sialic acid metabolism and protein sialylation in regulating the expression of genes that maintain breast cancer pathogenicity.
1. R. A. Kohnz et al., Protein Sialylation Regulates a Gene Expression Signature that Promotes Breast Cancer Cell Pathogenicity. ACS Chem. Biol.11, 2131–2139 (2016).
Protein Sialylation Regulates a Gene Expression Signature that Promotes Breast Cancer Cell Pathogenicity.
Rebecca A Kohnz, Lindsay S Roberts, David DeTomaso, Lara Bideyan, Peter Yan, Sourav Bandyopadhyay, Andrei Goga, Nir Yosef, and Daniel K Nomura.
ACS Chemical Biology, 2016 vol. 11 (8) pp. 2131-2139.
"High-Performance Lithium Metal Negative Electrode with a Soft and Flowable Polymer Coating", Guangyuan Zheng, Chao Wang, Allen Pei, Jeffrey Lopez, Feifei Shi, Zheng Chen, Austin D Sendek, Hyun-Wook Lee, Zhenda Lu, Holger Schneider, Marina M Safont-Sempere, Steven Chu, Zhenan Bao, and Yi Cui. ACS Energy Lett. 1, 1247–1255 (2016). DOI: 10.1021/acsenergylett.6b00456
The future development of low-cost, high-performance electric vehicles depends on the success of next-generation lithium-ion batteries with higher energy density. The lithium metal negative electrode is key to applying these new battery technologies. However, the problems of lithium dendrite growth and low Coulombic efficiency have proven to be difficult challenges to overcome. Fundamentally, these two issues stem from the instability of the solid electrolyte interphase (SEI) layer, which is easily damaged by the large volumetric changes during battery cycling. In this work, we show that when a highly viscoelastic polymer was applied to the lithium metal electrode, the morphology of the lithium deposition became significantly more uniform. At a high current density of 5 mA/cm2 we obtained a flat and dense lithium metal layer, and we observed stable cycling Coulombic efficiency of ∼97% maintained for more than 180 cycles at a current density of 1 mA/cm2.