Materials Literature
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A phenomenological modeling approach was developed to try to understand the reinforcing mechanism of starch nanocrystals in a nonvulcanized natural rubber matrix. Natural rubber was not cross-linked to maintain the biodegradability of the biosourced materials. Nonlinear dynamic mechanical experiments highlighted the s…
We have developed a versatile, one-step melt synthesis of water-soluble, highly emissive silicon nanoparticles using bi-functional, low-melting solids (such as glutaric acid) as reaction media. Characterization through transmission electron microscopy, selected area electron diffraction, X-ray photoelectron spectrosco…
For exploring group-IV semiconductor spintronics with ferromagnetic Heusler compounds, we study the local structural ordering of the stoichiometric Fe${}_{3}$Si and off-stoichiometric Fe${}_{3.2}$Si${}_{0.8}$ films epitaxially grown on Ge(111) at a very low temperature of 130 ${}^{ˆ}$C. Analyzing their $^{57}\mathrm{F…
The results of a combined x-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HR-TEM) study of Ni nanoparticles (NP), before and after oxidation, are presented. An experimental set-up was realized for the preparation and study of pre-formed NP films, concentrating the attention…
Large quantities of nanomaterials, e.g. nanowires (NWs), are needed to overcome the high market price of nanomaterials and make nanotechnology widely available for general public use and applications to numerous devices. Therefore, there is an enormous need for new methods or routes for synthesis of those nanostructur…
Wild Silkmoth cocoons are difficult or impossible to reel under conditions that work well for cocoons of the Mulberry silkmoth, Bombyx mori . Here we report evidence that this is caused by mineral reinforcement of Wild Silkmoth cocoons and that washing these minerals out allows for the reeling of commercial lengths of…
Capillary assembly was explored for the precise placement of 25 nm × 70 nm colloidal gold nanorods on prestructured poly(dimethylsiloxane) template surfaces. The concentration of nanorods and cationic surfactant cetyltrimethylammonium bromide (CTAB), the template wettability, and most critically the convective transpo…
Density functional theory at the level of the local density approximation with the projector augmented wave method is used to determine the structure of 180° domain walls in tetragonal ferroelectric PbTiO(3). In agreement with previous studies, it is found that PbO-centered {100} walls have lower energies than TiO(2)-…
The recrystallization behavior of poly(ethylene oxide) (PEO) on four amorphous films of poly(vinyl alcohol) (PVA), lysozyme (LYSO), poly(vinylpyrrolidone) (PVPY), and poly(acrylic acid) (PAA) was investigated using atomic force microscopy (AFM) and transmission electron microscopy (TEM). The results show that both the…
An artificial photoinduced electron-transfer system has been constructed by accumulating redox cofactors in a myoglobin crystal. The crystal space allowed the construction of a site-specific dense array, and the different redox cofactors had low reorganization energies, as observed in native photosynthesis. A charge-s…
Vertically aligned single crystalline ZnO nanorod arrays, approximately 3 μm in length and 50-450 nm in diameter are grown by a simple solution approach on a Zn foil substrate. CdS and CdSe colloidal quantum dots are assembled onto ZnO nanorods array using water-soluble nanocrystals capped as-synthesized with a short-…
ZnO nanoparticle array has been fabricated on the Si substrate by a simple thermal chemical vapor transport and condensation without any metal catalysts. This ZnO nanoparticles array is constructed from ZnO quantum dots (QDs), and half-embedded in the amorphous silicon oxide layer on the surface of the Si substrate. T…
This work reports a mechanistic study of template-directed synthesis of silica nanomaterials utilizing self-assembled peptide nanotubes as scaffolds. An ultrashort amphiphilic peptide (I 3 K) underwent self-assembly in aqueous solution under ambient conditions to form long and uniform nanotubes. The assembled peptide…
Umgebungseinfluss: Anpassbare, pH-responsive Nanopartikel können selektiv in endozytischen Kompartimenten aktiviert werden. Bei hohen pH-Werten bewirkt die Micellenbildung (links im Bild) eine Fluoreszenzlöschung durch Förster-Energietransfer. Bei niedrigen pH-Werten lösen sich die Micellen auf, was zu Fluoreszenz füh…
The recombinative surface loss of O 3 was investigated and its effects on the initial growth, film uniformity, and film conformality in atomic layer deposition (ALD) processes were illustrated. To determine O 3 recombination probabilities over a wide range, a method was developed using high aspect ratio capillaries at…
Cs2SiF6:Mn4+ and Cs2GeF6:Mn4+ red phosphors are synthesized by chemically etching Si and Ge in aqueous HF/CsMnO4 solutions. Photoluminescence (PL) analysis, PL excitation (PLE) spectroscopy, and Raman scattering techniques are used to investigate the optical properties of the phosphors. The Franck–Condon analysis of t…
In this perspective paper, we critically analyse the state-of-the-art of arc discharge technique of carbon nanoparticle synthesis. We discuss improving controllability of the arc discharge synthesis of carbon nanotubes, synthesis of graphene as well as general understanding of the synthesis process. Fundamental issues…
A new method for production of bimetallic rods, utilizing the equal channel angular extrusion (ECAE) process has been introduced before by previous researchers, but no attempt has been made to assess the effect of different temperatures and holding times in order to achieve a diffusional bond between the mating surfac…
The gas-phase oxidation of HCl to Cl 2 over heterogeneous catalysts, known as the Deacon process, is a sustainable way for chlorine recycling in the chemical industry. Mechanistic aspects of this reaction over metal oxides (Cr 2 O 3, CeO 2, and MnO 2 ) have been gathered using the temporal analysis of products (TAP) r…
Low-temperature plasmas find numerous applications in growth and processing of nanomaterials such as carbon nanotubes, inorganic nanowires and others. This paper provides an overview of the history, current status of the literature, challenges ahead in some of the technical areas and the potential for plasma-grown nan…