Steven P. Armes
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View article: Time‐Resolved SAXS Studies During the Synthesis of Hydrolytically Degradable Poly(ε‐caprolactone)‐Poly( <i>N,N′</i> ‐dimethylacrylamide) Diblock Copolymer Nanoparticles in Aqueous Media
Time‐Resolved SAXS Studies During the Synthesis of Hydrolytically Degradable Poly(ε‐caprolactone)‐Poly( <i>N,N′</i> ‐dimethylacrylamide) Diblock Copolymer Nanoparticles in Aqueous Media Open
The mechanism of nanoparticle formation during reverse sequence polymerization‐induced self‐assembly (PISA) is studied by small‐angle X‐ray scattering (SAXS). More specifically, N,N′ ‐dimethylacrylamide (DMAC) monomer is added to a trithio…
View article: Time‐Resolved SAXS Studies During the Synthesis of Hydrolytically Degradable Poly(ε‐caprolactone)‐Poly( <i>N,N′</i> ‐dimethylacrylamide) Diblock Copolymer Nanoparticles in Aqueous Media
Time‐Resolved SAXS Studies During the Synthesis of Hydrolytically Degradable Poly(ε‐caprolactone)‐Poly( <i>N,N′</i> ‐dimethylacrylamide) Diblock Copolymer Nanoparticles in Aqueous Media Open
The mechanism of nanoparticle formation during reverse sequence polymerization‐induced self‐assembly (PISA) is studied by small‐angle X‐ray scattering (SAXS). More specifically, N,N′ ‐dimethylacrylamide (DMAC) monomer is added to a trithio…
View article: Correction to “Combining Crystallization-Driven Self-Assembly with Reverse Sequence Polymerization-Induced Self-Assembly Enables the Efficient Synthesis of Hydrolytically Degradable Anisotropic Block Copolymer Nano-objects Directly in Concentrated Aqueous Media”
Correction to “Combining Crystallization-Driven Self-Assembly with Reverse Sequence Polymerization-Induced Self-Assembly Enables the Efficient Synthesis of Hydrolytically Degradable Anisotropic Block Copolymer Nano-objects Directly in Concentrated Aqueous Media” Open
View article: Degradable Diblock Copolymer Vesicles via Radical Ring-Opening Polymerization-Induced Self-Assembly in Aqueous Media
Degradable Diblock Copolymer Vesicles via Radical Ring-Opening Polymerization-Induced Self-Assembly in Aqueous Media Open
The development of degradable polymeric vesicles is essential for next-generation controlled delivery systems and responsive materials, particularly for therapy and diagnostics. However, achieving precise control over their synthesis and d…
View article: Covalent Capture of Nanoparticle-Stabilized Oil Droplets via Acetal Chemistry Using a Hydrophilic Polymer Brush
Covalent Capture of Nanoparticle-Stabilized Oil Droplets via Acetal Chemistry Using a Hydrophilic Polymer Brush Open
We report the capture of nanosized oil droplets using a hydrophilic aldehyde-functional polymer brush. The brush was obtained via aqueous ARGET ATRP of a cis-diol-functional methacrylic monomer from a planar silicon wafer. This prec…
View article: RAFT Dispersion Polymerization of 2-Hydroxyethyl Methacrylate in Non-polar Media
RAFT Dispersion Polymerization of 2-Hydroxyethyl Methacrylate in Non-polar Media Open
We report the reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of 2-hydroxyethyl methacrylate (HEMA) in n-dodecane using a poly(lauryl methacrylate) (PLMA) precursor at 90 °C. This formulation is an …
View article: Supra-particle formation by evaporation of aerosol droplets containing binary mixtures of colloidal particles: Controlling the final morphology
Supra-particle formation by evaporation of aerosol droplets containing binary mixtures of colloidal particles: Controlling the final morphology Open
We validate the hypothesis of a higher Pe increases the degree of buckling for both unimodal and bimodal nanoparticle size distributions by employing a higher evaporation rate (K) to increase Pe. However, if Pe is increased by lowering the…
View article: Phage Display Against 2D Metal–Organic Nanosheets as a New Route to Highly Selective Biomolecular Recognition Surfaces
Phage Display Against 2D Metal–Organic Nanosheets as a New Route to Highly Selective Biomolecular Recognition Surfaces Open
Peptides are important biomarkers for various diseases, however distinguishing specific amino‐acid sequences using artificial receptors remains a major challenge in biomedical sensing. This study introduces a new approach for creating high…
View article: Jeffamine-based diblock copolymer nanoparticles via reverse sequence polymerization-induced self-assembly in aqueous media
Jeffamine-based diblock copolymer nanoparticles via reverse sequence polymerization-induced self-assembly in aqueous media Open
Jeffamines® are commercially available amine-capped poly (alkylene oxides) that have been used for various applications. In this study, a weakly hydrophobic monoamine-capped propylene oxide-rich Jeffamine® (M2005) is derivatized to introdu…
View article: Synthesis of Phenanthrene/Pyrene Hybrid Microparticles: Useful Synthetic Mimics for Polycyclic Aromatic Hydrocarbon-Based Cosmic Dust
Synthesis of Phenanthrene/Pyrene Hybrid Microparticles: Useful Synthetic Mimics for Polycyclic Aromatic Hydrocarbon-Based Cosmic Dust Open
Polycyclic aromatic hydrocarbons (PAHs) are found throughout the interstellar medium and are important markers for the evolution of galaxies and both star and planet formation. They are also widely regarded as a major source of carbon, whi…
View article: Effect of Added Salt on the RAFT Polymerization of 2-Hydroxyethyl Methacrylate in Aqueous Media
Effect of Added Salt on the RAFT Polymerization of 2-Hydroxyethyl Methacrylate in Aqueous Media Open
We report the effect of added salt on the reversible addition-fragmentation chain transfer (RAFT) polymerization of 2-hydroxyethyl methacrylate (HEMA) in aqueous media. More specifically, poly(2-(methacryloyloxy)ethyl phosphorylcholine) (P…
View article: XPS Depth-Profiling Studies of Chlorophyll Binding to Poly(cysteine methacrylate) Scaffolds in Pigment–Polymer Antenna Complexes Using a Gas Cluster Ion Source
XPS Depth-Profiling Studies of Chlorophyll Binding to Poly(cysteine methacrylate) Scaffolds in Pigment–Polymer Antenna Complexes Using a Gas Cluster Ion Source Open
X-ray photoelectron spectroscopy (XPS) depth-profiling with an argon gas cluster ion source (GCIS) was used to characterize the spatial distribution of chlorophyll a (Chl) within a poly(cysteine methacrylate) (PCysMA) brush grown by…
View article: Capturing Enzyme-Loaded Diblock Copolymer Vesicles Using an Aldehyde-Functionalized Hydrophilic Polymer Brush
Capturing Enzyme-Loaded Diblock Copolymer Vesicles Using an Aldehyde-Functionalized Hydrophilic Polymer Brush Open
Compared to lipids, block copolymer vesicles are potentially robust nanocontainers for enzymes owing to their enhanced chemical stability, particularly in challenging environments. Herein we report that cis-diol-functional diblock c…
View article: Combining Crystallization-Driven Self-Assembly with Reverse Sequence Polymerization-Induced Self-Assembly Enables the Efficient Synthesis of Hydrolytically Degradable Anisotropic Block Copolymer Nano-objects Directly in Concentrated Aqueous Media
Combining Crystallization-Driven Self-Assembly with Reverse Sequence Polymerization-Induced Self-Assembly Enables the Efficient Synthesis of Hydrolytically Degradable Anisotropic Block Copolymer Nano-objects Directly in Concentrated Aqueous Media Open
Herein we combine the well-known processing advantages conferred by polymerization-induced self-assembly (PISA) with crystallization-driven self-assembly (CDSA) to achieve the efficient synthesis of hydrolytically degradable, highly anisot…
View article: Arginine-Functional Methacrylic Block Copolymer Nanoparticles: Synthesis, Characterization, and Adsorption onto a Model Planar Substrate
Arginine-Functional Methacrylic Block Copolymer Nanoparticles: Synthesis, Characterization, and Adsorption onto a Model Planar Substrate Open
Recently, we reported the synthesis of a hydrophilic aldehyde-functional methacrylic polymer (Angew. Chem., 2021, 60, 12032-12037). Herein we demonstrate that such polymers can be reacted with arginine in aqueous solut…
View article: Strong coupling in molecular systems: a simple predictor employing routine optical measurements
Strong coupling in molecular systems: a simple predictor employing routine optical measurements Open
We provide a simple method that enables readily acquired experimental data to be used to predict whether or not a candidate molecular material may exhibit strong coupling. Specifically, we explore the relationship between the hybrid molecu…
View article: XPS Depth-Profiling Studies of Chlorophyll Binding to Poly(cysteine methacrylate) Scaffolds in Pigment-Polymer Antenna Complexes using a Gas Cluster Ion Source
XPS Depth-Profiling Studies of Chlorophyll Binding to Poly(cysteine methacrylate) Scaffolds in Pigment-Polymer Antenna Complexes using a Gas Cluster Ion Source Open
X-ray photoelectron spectroscopy (XPS) depth-profiling with an argon gas cluster ion source (GCIS) was used to characterize the spatial distribution of chlorophyll a (Chl) within a poly(cysteine methacrylate) (PCysMA) brush grown by surfac…
View article: Chlorophyll Binding to Poly(cysteine methacrylate) Scaffolds in Pigment-Polymer Antenna Complexes studied by Depth-Profiling X-Ray Photoelectron Spectroscopy with a Gas Cluster Ion Source
Chlorophyll Binding to Poly(cysteine methacrylate) Scaffolds in Pigment-Polymer Antenna Complexes studied by Depth-Profiling X-Ray Photoelectron Spectroscopy with a Gas Cluster Ion Source Open
X-ray photoelectron spectroscopy (XPS) depth-profiling with an argon gas cluster ion source (GCIS) was used to characterize the spatial distribution of chlorophyll a (Chl) within a poly(cysteine methacrylate) (PCysMA) brush grown by surfac…
View article: Detecting Organics with Dust Impact Analyzer Instruments
Detecting Organics with Dust Impact Analyzer Instruments Open
The dust accelerator operated at the University of Colorado is used to study how the organic content of small particulates in space can be detected and identified using dust impact analyzer instruments. The Interstellar Dust Experiment (ID…
View article: Low-Viscosity Route to High-Molecular-Weight Water-Soluble Polymers: Exploiting the Salt Sensitivity of Poly(<i>N</i>-acryloylmorpholine)
Low-Viscosity Route to High-Molecular-Weight Water-Soluble Polymers: Exploiting the Salt Sensitivity of Poly(<i>N</i>-acryloylmorpholine) Open
We report a new one-pot low-viscosity synthetic route to high molecular weight non-ionic water-soluble polymers based on polymerization-induced self-assembly (PISA). The RAFT aqueous dispersion polymerization of N-acryloylmorpholine…
View article: Strong coupling in molecular systems: a simple predictor employing routine optical measurements
Strong coupling in molecular systems: a simple predictor employing routine optical measurements Open
We provide a simple method that enables readily acquired experimental data to be used to predict whether or not a candidate molecular material may exhibit strong coupling. Specifically, we explore the relationship between the hybrid molecu…
View article: Synthesis and Characterization of All-Acrylic Tetrablock Copolymer Nanoparticles: Waterborne Thermoplastic Elastomers via One-Pot RAFT Aqueous Emulsion Polymerization
Synthesis and Characterization of All-Acrylic Tetrablock Copolymer Nanoparticles: Waterborne Thermoplastic Elastomers via One-Pot RAFT Aqueous Emulsion Polymerization Open
Reversible addition-fragmentation chain transfer (RAFT) aqueous emulsion polymerization is used to prepare well-defined ABCB tetrablock copolymer nanoparticles via sequential monomer addition at 30 °C. The A block comprises water-soluble p…
View article: Controlling Adsorption of Diblock Copolymer Nanoparticles onto an Aldehyde-Functionalized Hydrophilic Polymer Brush via pH Modulation
Controlling Adsorption of Diblock Copolymer Nanoparticles onto an Aldehyde-Functionalized Hydrophilic Polymer Brush via pH Modulation Open
Sterically stabilized diblock copolymer nanoparticles with a well-defined spherical morphology and tunable diameter were prepared by RAFT aqueous emulsion polymerization of benzyl methacrylate at 70 °C. The steric stabilizer precursor used…
View article: Effect of Temperature, Oil Type, and Copolymer Concentration on the Long-Term Stability of Oil-in-Water Pickering Nanoemulsions Prepared Using Diblock Copolymer Nanoparticles
Effect of Temperature, Oil Type, and Copolymer Concentration on the Long-Term Stability of Oil-in-Water Pickering Nanoemulsions Prepared Using Diblock Copolymer Nanoparticles Open
A poly(glycerol monomethacrylate) (PGMA) precursor was chain-extended with 2,2,2-trifluoroethyl methacrylate (TFEMA) via reversible addition-fragmentation chain transfer (RAFT) aqueous emulsion polymerization. Transmission electron microsc…
View article: Graphical Abstract: Angew. Chem. Int. Ed. 2/2024
Graphical Abstract: Angew. Chem. Int. Ed. 2/2024 Open
In their Communication (e202313590), Yi Zhang, Yujian Zhang,Da-Wei Fu et al. report the unusual thermal quenching of photoluminescence in an organic-inorganic [MnBr 4 ] 2À -based halide mediated by crystalline-crystalline phase transition.
View article: Graphisches Inhaltsverzeichnis: Angew. Chem. 2/2024
Graphisches Inhaltsverzeichnis: Angew. Chem. 2/2024 Open
…ofmetal-organic cages (MOCs) is demonstrated by Cheng-Yong Su et al. in their Research Article (e202315053).Based on the intrinsic dynamics of different metal ions,itisshown how the dynamic stereochemistry of the cages is correlated with …
View article: Supra-Particle Formation by Evaporation of Aerosol Droplets Containing Binary Mixtures of Colloidal Particles: Controlling the Final Morphology
Supra-Particle Formation by Evaporation of Aerosol Droplets Containing Binary Mixtures of Colloidal Particles: Controlling the Final Morphology Open
View article: Effect of the Addition of Diblock Copolymer Nanoparticles on the Evaporation Kinetics and Final Particle Morphology for Drying Aqueous Aerosol Droplets
Effect of the Addition of Diblock Copolymer Nanoparticles on the Evaporation Kinetics and Final Particle Morphology for Drying Aqueous Aerosol Droplets Open
A deeper understanding of the key processes that determine the particle morphologies generated during aerosol droplet drying is highly desirable for spray-drying of powdered pharmaceuticals and foods, predicting the properties of atmospher…
View article: Synthesis of Poly(propylene oxide)–Poly(<i>N,N′</i>-dimethylacrylamide) Diblock Copolymer Nanoparticles via Reverse Sequence Polymerization-Induced Self-Assembly in Aqueous Solution
Synthesis of Poly(propylene oxide)–Poly(<i>N,N′</i>-dimethylacrylamide) Diblock Copolymer Nanoparticles via Reverse Sequence Polymerization-Induced Self-Assembly in Aqueous Solution Open
Sterically-stabilized diblock copolymer nanoparticles comprising poly(propylene oxide) (PPO) cores are prepared via reverse sequence polymerization-induced self-assembly (PISA) in aqueous solution. N,N'-Dimethylacrylamide (DMAC) act…
View article: Phage display against two-dimensional metal-organic nanosheets as a new route to highly selective biomolecular recognition surfaces
Phage display against two-dimensional metal-organic nanosheets as a new route to highly selective biomolecular recognition surfaces Open
Peptides are important biomarkers for a range of diseases, however distinguishing different amino-acid sequences using artificial receptors remains a major challenge in biomedical sensing. Here we present a new approach to creating highly …