Materials Literature
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In this paper, we reported novel liquid-crystalline luminophore that switches its photoluminescent color by mechanically grinding. Mechanochromic luminescence (MCL) is expected for mechanical sensor, cellular imaging, detection of microenvironmental changes, and optical memory. In this work, we focused on liquid-cryst…
LOCA simulation tests were performed in the QUENCH facility of KIT on fuel rod bundle scale. The first two tests using Zircaloy-4 claddings, out of a series of six tests with different cladding alloys, were already performed. The test conditions and results are described. The secondary hydrogenation of the Zircaloy-4…
The most relevant two‐phonon band in the Raman spectrum of graphene is the 2D band. In addition, there are numerous other combination bands with much smaller intensities in the observed spectra (e.g. or ). Their origin can be understood within the double resonance theory. However, calculations on single‐layer graphene…
ABSTRAK Komposit merupakan material teknik yang dibuat melalui penggabungan dua macam bahan yang mempunyai sifat berbeda menjadi satu material baru dengan sifat yang berbeda pula. Serat alam sebagai penguat komposit yaitu lebih ramah lingkungan dan mudah terurai, selain itu komposit serat alam juga mempunyai daya reda…
In the present study, the charge transient spectroscopy was used to analyze the transient relaxation of charges in graphene and bilayer-graphene quantum dot (QD) systems formed by chemical functionalization of graphene and few-layer graphene layers. A set of activation energies (one to three different values) for the…
Under neutron irradiation, recrystallized zirconium alloys, used as structural materials for Pressurized Water Reactor (PWR) fuel assemblies, undergo stress-free growth which accelerates for high irradiation doses. This acceleration is correlated to the formation of c-component vacancy dislocation loops lying in the b…
Magnetic material, Mn-Ferrite, was prepared from iron sand using precipitation and sol-gel methods. The methods were applied to produce a homogenous and nanosized powder. The precipitation process was taken place at room temperature. MnO2 and Fe3O4 were dissolved with HCl solution to obtained MnCl2, FeCl2 and FeCl3 an…
In this contribution we discuss luminescent down-shifting (LDS) systems consisting of a polymer matrix filled with phosphor particles. It is an elegant approach to make a use of potentially destructive or otherwise wasted high energy photons and diminish charge carrier losses caused by thermalization in photovoltaics.…
NaYbF4:Tm3+@TiO2 core–shell nanoparticles were successfully synthesized by the hydrothermal method, followed by hydrolysis of tetrabutyl titanate (TBOT). The ultraviolet and blue UC luminescence are decreased significantly for NaYbF4:Tm3+@TiO2 with a 980 nm semiconductor laser, which originated from the 1D2 → 3H6 and…
Isolated intrinsic and phosphorus doped (P-doped) Si-nanocrystals (Si-NCs) on n- and p-Si substrates are fabricated by excimer laser crystallization techniques. The formation of Si-NCs is confirmed by atomic force microscopy (AFM) and conductive AFM measurements. Kelvin probe force microscopy (KPFM) is then carried ou…
The irradiation damage in the fuel cladding material is mainly caused by the neutron flux resulting from the fission reactions occurring in the fuel. From an experimental point of view, the neutrons have the disadvantage to activate materials by neutron capture rendering them difficult to handle. To avoid these constr…
Ag–reduced graphene oxide (Ag/rGO) nanoparticle composites were synthesized through a facile one-step hydrothermal reaction using GO and silver carbonate (Ag 2 CO 3 ) as raw materials. The homogeneous silver nanospheres with an average size of 50 nm well dispersed on the surface of rGO were obtained without other addi…
Although the development of small formats (640x480 pixel arrays) and amorphous silicon microbolometers has greatly decreased detector cost, another important component of a thermal camera, optics, still prohibit a breakthrough for highvolume commercial systems. Aspheric lenses used in the thermal imaging are typically…
Based on fuzzy evaluation and the analysis hierarchy process, this paper develops a method for evaluating the self-healing capability of asphalt mixtures. In developing the method, 18 judgment indicators were selected on the basis of a study on the influence factors of self-healing capability, and a numerical approach…
Three polynuclear lanthanide clusters: (NH4)2[Dy6Mo4O12(rac-L(3-))4(OOCCH3)8]·4CH3OH·6H2O (I), (Et3NH)2[Dy6Mo4O12(rac-L(3-))4(OOCCH3)8]·18H2O (II), and (Me4N)2[Dy6Mo4O12(rac-L(3-))4(OOCCH3)8]·CH3OH·14H2O (III) (H3L = (E)-2-((2,3-dihydroxypropylimino)methyl)-phenol) were synthesized. Single-crystal analysis reveals tha…
A new species of the genus Cocconeis is described. Cocconeis sawensis sp. nov. was observed as epiphyte on the macrophyte Chara Linn. sp., collected from a saline lake in Iraq (Sawa Lake). Description of the new species is based on details observed with light and scanning electron microscopy. Cocconeis sawensis belong…
Chemically synthesized, commercially available Au nanorods were adsorbed on a TiO₂ thin film, and photoelectrochemically transformed to Au nanodumbbells by photoelectrochemical deposition of Au at both ends of the NRs under UV irradiation. The nanodumbbells show about fourfold greater light absorption than the nanorod…
Waterborne polyurethane dispersions in nanoparticles were synthesized from poly (propylene glycol), isophorone diisocyanate, and dimethylolpropionic acid in a modified prepolymer process. Three groups of specimens with variations in hard-to-soft segment molar ratios were synthesized in Group A experiments to confirm t…
The current method for investigating the blinking behavior is to immobilize quantum dots (QDs) in the matrix and then apply a fluorescent technique to monitor the fluorescent trajectories of individual QDs. So far, no method can be used to directly assess the blinking state of ensemble QDs in free solution. In this st…
We report a detailed nuclear magnetic resonance (NMR) study by combined $^{23}\mathrm{Na}$ and $^{75}\mathrm{As}$ measurements over a broad range of doping to map the phase diagram of ${\mathrm{NaFe}}_{1\ensuremath{-}x}{\mathrm{Co}}_{x}\mathrm{As}$. In the underdoped regime $(x\ensuremath{\le}0.017)$, we find a magnet…