Materials Literature
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A nanosensor is a sensor that is built on the nanoscale, whose purpose is mainly to obtain data on the atomic scale and transfer it into data that can be easily analyzed. Nanosensors have a wide application in the fields of environmental protection, biotechnology, medical diagnostics, drug screening, food safety and s…
Reine Magie: CdSe-Nanocluster mit magischer Größe wurden bislang nur als Mischungen erhalten. Zwei ligierte Formen von (CdSe)13 wurden nun durch Exfoliation doppellagiger Nanocluster-n-Octylamin-Aggregate mit nachfolgender Freisetzung von [(CdSe)13(n-Octylamin)13]- oder frei löslichen [(CdSe)13(Oleylamin)13]-Nanoclust…
Abstract Boltorn hyperbranched aliphatic polyesters were functionalized with polyhedral oligomeric silsesquioxane (POSS) and incorporated into linear thermoplastic polyurethane (TPU). Increasing POSS‐functionalized Boltorn concentration led to an increase in agglomerate size and frequency, due to interactions between…
Abstract A new series of poly(amide‐imide)s (PAI) modified with a siloxane linkage was synthesized under microwave radiation in ionic liquids and organic salts via the isocyanate method. The polymerization reactions of a novel siloxanic diacid monomer with 4,4′‐methylene‐bis(4‐phenylisocyanate) MDI were studied in amm…
Zwei Template: Geordnetes Siliciumdioxid mit zweierlei Mesoporen entsteht durch die verdampfungsinduzierte schrittweise Aggregation einer sauren THF/H2O-Lösung von Tetraethylorthosilicat in Gegenwart von zwei Templaten: einem ungeladenen Blockcopolymer PEO-b-PMMA (rote Kugeln) und kationischen Alkyltrimethylammoniumbr…
Abstract To obtain additives that could simultaneously increase the dry strength and wet strength of paper sheets, we synthesized a series of crosslinked cationic glyoxalated polyacrylamide (GPAM) resins by using acrylamide (AM), 2‐methacryloxyethyl trimethyl ammonium chloride (DMC), N ‐methylolacrylamide (NMA), 2‐mer…
Abstract In this study, the kind of halogen‐free flame‐retardant containing phosphorus and nitrogen was blended with polypropylene (PP) by hot melt to improve the flame‐retardant property of the composites. The cone calorimeter was used to investigate flame‐retardant property of the composites. The formation mechanism…
Femtosecond transient absorption microscopy was employed to study the excited-state dynamics of individual semiconducting single-walled carbon nanotubes (SWNTs) with simultaneously high spatial (∼200 nm) and temporal (∼300 fs) resolution. Isolated SWNTs were located using atomic force microscopy, and Raman spectroscop…
Abstract Talc is a laminar silicate, considered as an excellent nucleating agent for polypropylene (PP) crystallization. However, properties of PP/talc composites depend on the morphology, size, and surface of mineral particles. In this sense, talc from several ores, having different morphology, imparts specific chara…
Abstract Multilayer films for food packaging applications composed of polyvinyl alcohol (PVOH) as the core layer and polyhydroxyalkanoate (PHA) as the outer skin layers were produced by the co‐extrusion process. Rheological properties of PVOH and PHA were performed and analyzed before co‐extruding into a cast film. An…
Abstract A series of blends based on poly(lactic acid) (PLA) and poly[(butylene succinate)‐ co ‐adipate] (PBSA) as well as their nanocomposites with nanoclay (PLA/PBSA/Clay ternary nanocomposites) were prepared using the twin‐screw extruder. The blends were prepared for PBSA contents ranging from 25 to 75 wt % and the…
Abstract The mononuclear molybdenum complexes [MoO 2 (acac) 2 ] ( 1 , acac=acetylacetonate), [MoO 2 (SAP)(MeOH)] ( 2 ), and dinuclear oxomolybdic complexes [MoO 2 L] 2 [L=salicylideneaminophenolato (SAP, 5 ), salicylideneaminoethanolato (SAE, 6 ), salicylideneaminomethylpropanolato (SAMP, 7 )] have been investigated a…
Abstract In this study, several polyolefins, including different grades of polypropylene (PP), high‐density polyethylene, linear low‐density polyethylene, and low‐density polyethylene, were tested by thermogravimetric analysis (TGA), and the relationships of their melt flow index (MFI) and melt flow ratio (MFR) values…
Abstract Composites from poly(lactic acid) (PLA) and acetylated microfibrillated cellulose (MFC) were prepared by a solvent casting technique. MFC, mechanically isolated from never‐dried bleached birch Kraft pulp, was used as a reinforcement. The acetylation reaction was carried out at 105°C in toluene and proved to b…
Topological insulator (TI) states have been demonstrated in materials with narrow gap and large spin-orbit interactions (SOI). Here we demonstrate that nanoscale engineering can also give rise to a TI state, even in conventional semiconductors with sizable gap and small SOI. Based on advanced first-principles calculat…
It takes two: Ordered dual-mesoporous silica with two sets of well-configured pores can be synthesized by evaporation-induced step-by-step aggregating assembly in which the non-ionic block copolymer PEO-b-PMMA (red spheres) and the cationic surfactant alkyltrimethyl ammonium bromide (yellow rods) serve as co-templates…
We show that PT-symmetry may exist only for isolated frequencies in optical systems. Therefore, PT-symmetry breaking transitions as the frequency is tuned up, discussed in Y. D. Chong, L. Ge, and A. D. Stone, Phys. Rev. Lett. 106, 093902 (2011), cannot be observed in measurements of the spectrum of scattered intensity.
Recent work by Elder, Ward and Zhang [Phys. Rev. B83. 165210 (2011)] has shown need for correction and modification of current implementation of the k.p method and operator ordering scheme using the interaction parameters defined under double group consideration. This manuscript examines the difference in treatment of…
Pure magic: CdSe nanoclusters with a magic size have previously been obtained only as mixtures. Two ligated forms of (CdSe)13 have now been isolated by exfoliation of nanocluster–n-octylamine bilayer aggregates followed by release of [(CdSe)13(n-octylamine)13] or freely soluble [(CdSe)13(oleylamine)13] nanoclusters by…
Liposomes are effective lipid nanoparticle drug delivery systems, which can also be functionalized with noninvasive multimodality imaging agents with each modality providing distinct information and having synergistic advantages in diagnosis, monitoring of disease treatment, and evaluation of liposomal drug pharmacoki…