Materials Literature
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Rheological measurements have long been an invaluable technique in studying mechanical and structural properties of polymers. Measurements on dilute, noninteracting polymer solutions allow the determination of macromolecular structural information, such as molecular weight. This analysis has been complicated by molecu…
Long-wave infrared fibers are used in an increasing number of applications ranging from thermal imaging to bio-sensing. However, the design of optical fiber with low-loss in the far-infrared requires a combination of properties including good rheological characteristics for fiber drawing and low phonon energy for wide…
We present the application of an evolutionary genetic algorithm for the in situ optimization of nanostructures that are prepared by focused electron-beam-induced deposition (FEBID). It allows us to tune the properties of the deposits towards the highest conductivity by using the time gradient of the measured in situ r…
A model of a supercapacitor with pseudocapacitance focusing on effects along the thickness of the electrode was developed. Fast charging, i.e. high power density operation, was analyzed. The occurrence of moving reaction fronts under these conditions is found and discussed. Indicators of the occurrence of moving react…
Major research efforts are continuously being made to look for alternative, environment friendly green chemicals for the synthesis of nanoparticles in place of conventional and hazardous reducing agents such as sodium borohydride and hydrazine. We report here on the synthesis and characterization of AgNPs using a ther…
A recently proposed method is used to parameterize the nucleation‐driven kinetics of poly( ε ‐caprolactone) melting. The method is based on fitting a theoretically derived temperature dependence of the effective activation energy to the experimental dependence obtained from the Kissinger plot. Although the theoretical…
Polycaprolactone (PCL) scaffolds were produced by electrospinning. Polymeric solutions in a mix of dichloromethane (DCM) and dimethylformamide were electrospun to form fibers in the sub-micron range. Physical properties of the PCL solutions were characterized with respect to density, viscosity, conductivity and surfac…
Solvent has a key role in the controllable synthesis of nanocrystals (NCs). Here, using X-ray absorption spectroscopy, we demonstrate that solvent can significantly influence the adsorption of thiols on Au NCs, and thereby affects their growth. It is shown that increasing the solvent polarities leads to the higher thi…
The selectivity of supported gold catalysts in solvent- and radical initiator-free aerobic oxidation of cyclohexene was tuned by either WO <sub>3</sub> or MIL-101.
Condensates from the gas stream in simulated CO 2 transport pipelines have been identified during the experiments in the laboratory. Because of their acidic origin the corrosion resistance of pipeline steels used for CCS (carbon capture and storage) technology might be limited. Over the last years it has become clear…
With principles that are shaping today's most advanced technologies, from nanomedicine to electronic nanorobots, colloid and interface science has become a truly interdisciplinary field, integrating chemistry, physics, and biology. Colloid and Surface Chemistry: Exploration of the Nano World- Laboratory Guide explains…
Thermochromic VO2 nanoparticles have been dispersed into polyvinyl pyrrolidone (PVP) fibers by electrospinning of a VO2-PVP blend solution. The structure and optical properties of the obtained composite fiber mat were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible (UV-Vis)…
A well-crystallized Ti-incorporated metal organic framework, MIL-125(Ti), synthesized using a solvothermal method, was introduced into NaAlH4 as the catalyst precursor to improve the dehydrogenation–hydrogenation kinetics. Adding 5 wt% MIL-125(Ti) dramatically decreased the operating temperatures and improved the reac…
The synthesis and self-assembly of a series of copolyesters incorporating varying mol ratios of an achiral oligo(p-phenylenevinylene) (OPV) into the backbone of a chiral poly(L-lactic acid) (PLLA) via high temperature solution blending is reported. The polymers were characterized by 1H NMR spectroscopy and size exclus…
N-Fused [22]pentaphyrin(1.1.1.1.1) transformed into recombined N-fused pentaphyrin bromide after treatment with N-bromosuccinimide. This bromide was highly reactive to nucleophiles to give the corresponding substituted products including aminated, oxidized, and unsubstituted derivatives.
We have proposed recently that the DO3A-N-α-(amino)propionate chelator and its amide conjugates are leads to targeted, high relaxivity, safe contrast agents for magnetic resonance imaging. In this work we illustrate further the expeditious nature and robustness of the synthetic methodologies developed by preparing the…
A novel unsymmetrical diarylethene with an imidazo [4,5‐ f ] [1,10] phenanthroline unit has been synthesized, and its properties including photochromism and fluorescence have been investigated. It showed favorable photochromism and functioned as notable fluorescence switches by photoirradiation in both solution and a…
Uniform silica/ultrasmall silver composite microspheres have been successfully prepared from silica microspheres and [Ag(NH <sub>3</sub> ) <sub>2</sub> ] <sup>+</sup> <italic>via</italic> a hydrothermal process. The as-prepared silica/Ag microspheres exhibit an excellent antibacterial performance towards <italic>E. co…
Diblock brush terpolymers (DBTs) with different fluorinated methacrylate-based block segments are synthesized through sequential ring-opening metathesis polymerizations and are used to prepare polymer thin films with predictable film thicknesses. These DBTs exhibit preferable substrate vertical alignments within the f…
We use quasi-steady-state photoinduced absorption (PIA) to study charge generation in blends of poly(3-hexylthiophene-2,5-diyl) (P3HT) with PbS nanocrystal quantum dots as a function of excitation energy. We find that, per photon absorbed, the yield of photogenerated holes present on the conjugated polymer increases w…