We report a new approach for the facile synthesis of high-order multiblock copolymers comprising very short blocks. The entails sequential addition different monomers via an iterative single electron transfer–living radical polymerization technique, allowing nearly perfect control copolymer microstructure. It is possible to synthesize with unprecedented control, i.e., A-B-C-D-E-etc., without any need purification between 24 h block formation steps. To illustrate this concept, we model...

This work describes a study into thiol–ene based Michael addition reactions. Different catalysts, primary and tertiary amines phosphines, were investigated for the reaction of range thiols with dimers oligomers some (meth)acrylates. Primary are efficient catalysts reaction, although these require several hours to reach high conversion. Moreover, phosphine dimethylphenylphosphine (DMPP) tris-(2-carboxyethyl)phosphine (TCEP), in detail. DMPP is an efficacious catalyst yielding complete...

Controlled/living radical polymerization is an efficient technique for the synthesis of well-defined polymeric architectures, including copolymers, block stars, graft, and variations thereof. In this article, we report first time a decablock copolymer via simple iterative Cu(0)-mediated technique. approach, purification not required between chain extension steps, as each formation taken to full conversion. The final can be obtained with yield in mass ∼90%. Using traditional controlled/living...

Stainless steel (SS) can be an attractive material to create large electrodes for microbial bioelectrochemical systems (BESs), due its low cost and high conductivity. However, poor biocompatibility limits successful application today. Here we report a simple effective method make SS biocompatible by means of flame oxidation. Physicochemical characterization electrode surface indicated that iron oxide nanoparticles (IONPs) were generated in situ on felt IONPs-coating dramatically enhanced the...

Despite the rapid development of drug delivery vehicles that react to a specific biological environment, complexity triggering release in particular target area remains an enduring challenge. Here, engineering bioresponsive polymer‐mesoporous silica nanoparticles (MSNs) with function akin AND logic gate is described. Polycaprolactone (esterase degradable) immobilized into core MSNs while polyacrylic acid (PAA), which pH responsive, covered outside create PAA‐PCL‐MSNs construct. Fluorescence...

Abstract Single-molecule surface-enhanced Raman spectroscopy (SERS) has attracted increasing interest for chemical and biochemical sensing. Many conventional substrates have a broad distribution of SERS enhancements, which compromise reproducibility result in slow response times single-molecule detection. Here we report smart plasmonic sensor that can reversibly trap single molecule at hotspots rapid The was fabricated through electrostatic self-assembly gold nanoparticles onto...

Abstract Polymersomes provide a good platform for targeted drug delivery and the creation of complex (bio)catalytically active systems research in synthetic biology. To realize these applications requires both spatial control over encapsulation components polymersomes means to report where are polymersomes. address twin challenges, we synthesized protein–polymer bioconjugate PNIPAM‐ b ‐amilFP497 composed thermoresponsive poly( N ‐isopropylacrylamide) (PNIPAM) green‐fluorescent protein...

Various poly(oligo(ethylene glycol) methyl ether methacrylate)s (POEGMEMAs) have been prepared by Catalytic Chain Transfer Polymerization (CCTP) using a range of OEGMEMA monomers (molecular weight from 180 to 1100 g mol−1). The chain transfer constants bis(boron difluorodimethylglyoximate) cobalt(II) (CoBF) were determined and are reported for each monomer. copolymerization POEGMEMA (Mn = 475 mol−1) with diethylene glycol methacrylate (DEGMEMA) yielded thermoresponsive polymers. lower...

Abstract Copper(0)‐mediated radical polymerization (single electron transfer‐living polymerization) is an efficient technique that allows control over the of acrylates, vinyl chloride and other monomers, yielding bromide terminated polymer. In this contribution, we investigate evolution end‐group fidelity at very high conversion both in presence absence initially added copper (II) (CuBr 2 ). High resolution electrospray‐ionization mass spectroscopy (ESI‐MS) determination precise chemical...

A silica-based mesoporous nanosphere (MSN) controlled-release drug delivery system has been synthesized and characterized. The uses L-cysteine derivatized gold nanoparticles (AuNPs), bound to the MSNs using Cu2+ as a bridging ion. AuNPs serve removable caps that hinder release of molecules inside amino functionalized MSN framework. modified themselves exhibit negligible cytotoxicity living cells, revealed 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. requires one...

An easy to use and fabricate sun exposure sensor was prepared via the inkjet printing of titanium dioxide (TiO2), polyvinylpyrrolidone (PVP), food dye on paper. The works by employing (TiO2) as a photocatalyst degrade dyes resulting in gradual discoloration this film. PVP serves binder allow film formation. can be observed naked eye or quantitatively monitored using UV–vis reflectance spectra. Finally, films calibrated match UV time different skin types, neutral density filters with ability...

We investigate the influences that functional group, polymer molecular weight and architecture have on adsorption behaviour of some sulfur containing oligo(ethylene glycol) polymers to gold. QCM-D XPS was used in this investigation revealing disulfide groups bind with more mass deposited than dithio, trithio or thiols. This observed small di(ethylene higher polymers. The effect sulfo-groups not as apparent Longer PEG pendent chains resulted lower binding overall gold surface comparison...

In this communication, we report on a new route to the functionalization of ATRP polymers exploiting their halide end-groups, which were converted successfully into reactive disulfide using sodium methanethiosulfonate. The resultant disulfide-terminated could then be reacted with different functional thiols yield either thiol/disulfide exchange chemistry or thiol/ene "click" reactions.

A successful modification of titanium dioxide (TiO2) nanoparticles surfaces by a grafting-to polymer technique combining catalytic chain transfer and thiol–ene click chemistry is reported. Vinylic end functional polymers were first prepared polymerization (CCTP) using oligo(ethylene glycol) methacrylate as monomer. The presence vinylic groups was then exploited to attach the thiol functionalized TiO2 via Michael nucleophilic reactions. X-ray photoelectron spectroscopy (XPS), attenuated total...

We report a straightforward way for forming and tuning the optical properties of thermally responsive plasmonic nanogels. Upon functionalization, small red shift (2–3 nm) pNIPAM@AuNPs was observed due to changes in refractive index surrounding AuNP. By adding thermoresponsive poly-N-isopropylacrylamide (pNIPAM) into pNIPAM@AuNP, its response significantly increased. Heating nanogel such that pNIPAM collapsed acted as cross-link resulted aggregation AuNPs. The with shifts up 20 nm observed....

In this work, we combine reversible addition fragmentation transfer polymerization (RAFT) with cobalt catalytic chain (CCT) to obtain ω-unsaturated polymers relatively low polydispersity values.

Herein is described plasmonic nanoparticles assembled into core–satellite nanostructures that exhibit dynamic and reversible tuning of the surface plasmon resonance.

We report on the characterisation of optical properties and dynamic behaviour optically trapped single stimuli-responsive plasmonic nanoscale assemblies.

Abstract This review (sourced from ± 300 references) is focused on the use of soft ionization mass spectroscopy to characterize products polymerization/degradation reactions thereby yielding mechanistic information. We provide a brief description different spectrometers techniques available for polymer analyses, including MALDI‐TOF, ESI‐MS, and précis spectrometer performance, together with critique summarizing limitations advantages each. On we detail possible side that can occur when...

The incorporation of a versatile and tuneable polymer–peptide network into the pores porous silicon photonic crystals improves selectivity optical biosensors to detect certain types matrix metalloproteinase enzymes.

Abstract The assembly of sophisticated gold nanoparticle constructs where thermoresponsive core‐satellite nanostructures are created and the satellites close enough to core for strong surface plasmon resonance coupling occur, has begun be developed. linker between being a polymer means that dispersion these will show temperature‐dependent optical properties as distance changes. Unlike previous related systems undergo single transition, herein system with dual transitions (block copolymer...

Abstract The present study investigates the degradation behavior of various high‐molecular‐weight acrylic polymers (50,000 < M n /g mol −1 100,000), namely poly(methyl methacrylate) (PMMA), poly( ‐butyl (PBMA), acrylate) (PBA), and poly(lauryl (PLMA), under extreme environmental conditions. These were synthesized via polymerization techniques to create different end‐groups. chosen are readily applicable in formulation surface coatings degraded conditions which replicate harsh Australian...