Peter V. Bonnesen

Front Cover: Functionalization Enhanced Phase Separation in PS‐ b ‐PVP Derived Polyzwitterionic Block Copolymers

Polyxeni P. Angelopoulou, Jong K. Keum, Martí Checa, Peter V. Bonnesen et autres

Polyzwitterion-containing block copolymers (BCPs) are prepared from neutral poly(styrene)-block-poly(vinylpyridine) BCPs via a two-step synthetic procedure. The polyzwitterionic BCPs phase separate into well-ordered nanostructures with feature sizes down to 5.3 nm highlighting the strong tendency for block demixing in the system. More details …

Tunable Nanostructures from Inverse Surfactants

Nivedina A. Sarma, Alexandra Grigoropoulos, Mustafa Arslan, Erika E. Salzman et autres

Abstract Hierarchical materials in the natural world are often made through the self-assembly of amphiphilic molecules. Achieving similar structural complexity in synthetic materials requires understanding how various molecular parameters affect assembly behavior. In recent years, inverse surfactants─molecules with hydrophobic head groups and …

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Functionalization Enhanced Phase Separation in PS‐ b ‐PVP Derived Polyzwitterionic Block Copolymers

Polyxeni P. Angelopoulou, Jong Kahk Keum, Martí Checa, Peter V. Bonnesen et autres

Block copolymers with strong tendency for block demixing have attracted significant attention especially for applications in microelectronics and membranes. Enabling technological advances in these areas critically depends on access to well-defined nanostructures with dimensions near or below 10 nm. Block copolymers bearing …

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Emergent Nanostructure and Ion Transport in Polyzwitterion/Polyanion Blends

Hongwei Li, Qinyu Zhu, Yuya Shinohara, Yangyang Wang et autres

High Resolution Image Download MS PowerPoint Slide Solid polymer electrolytes (SPEs) hold great promise for the advancement of next-generation energy storage devices. However, the ion transport mechanism in SPEs remains poorly understood. In this study, we investigate blends of poly(1-(3-sulfonatopropyl)-2-vinylpyridinium) (P2VPPS) and …

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Dielectric properties of zwitterionic liquids

Yangyang Wang, Honghai Zhang, Peter V. Bonnesen

The dielectric properties of a series of zwitterionic liquids are thoroughly examined in both the solution and melt states. In dilute solutions, the molar dielectric increment and subsequently derived dipole moment of zwitterionic liquids correlate strongly with the number of linker atoms …

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Influence of Steric and Electronic Properties of P2 Groups on Covalent Inhibitor Binding to SARS-CoV-2 Main Protease

Dipendra Bhandari, Leighton Coates, Annie Aniana, John M. Louis et autres

The main protease (MPro) of SARS-CoV-2 is a critical enzyme required for viral replication, making it a prime target for antiviral drug development. Covalent inhibitors, which form a stable interaction with the catalytic C145, have demonstrated strong inhibition of MPro, but the …

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Learning continuous scattering length density profiles from neutron reflectivities using convolutional neural networks*

Panagiotis Christakopoulos, Hanyu Wang, Jong Kahk Keum, Polyxeni P. Angelopoulou et autres

Abstract Interpreting neutron reflectivity (NR) data using ad hoc multi-layer models and physics-based models provides information about spatially resolved neutron scattering length density (NSLD) profiles. Recent improvements in data acquisition systems have allowed acquiring thousands of NR curves in a couple of …

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Correction to “Synthesis of Perdeuterated Alkyl Amines/Amides with Pt/C as Catalyst under Mild Conditions”

Honghai Zhang, Meng-Zhe Chen, Xinbin Yu, Peter V. Bonnesen et autres

Characterizing Hygroscopic Films of Polyzwitterions in Electric Fields Using Neutron and X-ray Reflectometries: Electrostriction or Mass Loss?

Panagiotis Christakopoulos, Hanyu Wang, Peter V. Bonnesen, Jong Kahk Keum et autres

We study responses of thermally annealed ultrathin films deposited on silicon substrates and containing polyzwitterions to applied electric fields by using specular neutron reflectometry (NR). In particular, we applied 7 kV under vacuum at 150 °C on the films containing poly(1-(3-sulfonatopropyl)-2-vinylpyridinium) (P2VPPS) …

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Effect of Micellar Morphology on the Temperature-Induced Structural Evolution of ABC Polypeptoid Triblock Terpolymers into Two-Compartment Hydrogel Network

Naisheng Jiang, Tianyi Yu, Meng Zhang, Bailee N. Barrett et autres

High Resolution Image Download MS PowerPoint Slide We investigated the temperature-dependent structural evolution of thermoreversible triblock terpolypeptoid hydrogels, namely poly( N -allyl glycine)- b -poly( N -methyl glycine)- b -poly( N -decyl glycine) (AMD), using small-angle neutron scattering (SANS) with contrast matching …

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Synthesis of Perdeuterated Alkyl Amines/Amides with Pt/C as Catalyst under Mild Conditions

Honghai Zhang, Meng-Zhe Chen, Xinbin Yu, Peter V. Bonnesen et autres

A convenient method for the synthesis of perdeuterated alkyl amides/amines is disclosed. Perdeuterated acetyl amides can be achieved by a hydrogen–deuterium (H/D) exchange protocol with Pt/C as a catalyst and D 2 O as a deuterium source under mild conditions. After removal …

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AI for Manufacturing and Healthcare: a chemistry and engineering perspective

Jihua Chen, Amirkoushyar Ziabari, Xuan Xu, Honghai Zhang et autres

Artificial Intelligence (AI) approaches are increasingly being applied to more and more domains of Science, Engineering, Chemistry, and Industries to not only improve efficiencies and enhance productivity, but also enable new capabilities. The new opportunities range from automated molecule design and screening, …