Materials Literature
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Polarized Raman spectra of isostructural orthorhombic YCrO${}_{3}$ and YMnO${}_{3}$ single crystals were collected at the same conditions using different laser excitation in the visible range. The symmetry of the observed lines was determined and they were assigned to definite atomic vibrations based on lattice dynami…
In this letter, the ultrafast vibrational dynamics of individual gold nanorings has been investigated by femtosecond transient absorption spectroscopy. Two acoustic vibration modes have been detected and identified. The influence of the mechanical coupling at the nanoparticle/substrate interface on the acoustic vibrat…
A series of multifunctional platinum(II) bipyridine complexes were designed, synthesized, and characterized by (1)H NMR, fast atom bombardment mass spectrometry (FAB-MS), and elemental analysis. Their electrochemical and photophysical properties were investigated. The photochromic properties of the spironaphthoxazine-…
Recent circular dichroism spectroscopy and scanning tunneling microscopy study reported that a de novo designed α-helical peptide (with amino acid sequence DELERRIRELEARIK) would transform to β-sheet structure as well as random coil structure upon the addition of graphite particles to the peptide solution and aggregat…
Purpose The purpose of this paper is to make people aware of organic corrosion inhibitors. Design/methodology/approach As it is a literature review paper, no specific method is used. Findings It has been found that plant extracts and oils show inhibition efficiency up to 98 percent, so it is certain that plant extract…
We demonstrate that the ability to manipulate the polarization of synchrotron radiation can be exploited to enhance the capabilities of X-ray absorption near-edge structure (XANES) spectroscopy, to include linear dichroism effects. By acquiring spectra at the same photon energies but different polarizations, and using…
Advances in molecular assembly are converging to an ultimate in atomistic precision —nanostructures built by single atoms. Recent experimental studies confirm that single chains of carbon atoms —carbyne— exist in stable polyyne structures and can be synthesized, representing the minimal possible nanowire. Here we repo…
This study was performed to determine whether extracellular silver nanoparticles (AgNPs) production is a genus-wide phenotype associated with all the members of genus Morganella, or only Morganella morganii RP-42 isolate is able to synthesize extracellular Ag nanoparticles. To undertake this study, all the available M…
We report on an experimental study of cavitation bubble dynamics within sub-millimetre-sized narrow gaps. The gap height is varied, while the position of the cavitation event is fixed with respect to the lower gap wall. Four different sizes of laser-induced cavitation bubbles are studied using high-speed photography o…
The growth of helical filaments in the B4 liquid-crystal phase was investigated in mixtures of the bent-core and calamitic mesogens NOBOW and 8CB. Freezing-point depression led to nucleation of the NOBOW B4 phase directly from the isotropic phase in the mixtures, forming large left- and right-handed chiral domains tha…
Novel bisphenol-1,2,3-triazole (BPT) resins, including epoxy (DGE-BPT) and cyanate ester (BPTCE) systems, were prepared and used in curing chemistry with no added reagents or catalysts. The materials were characterized relative to conventional epoxies and cyanate esters, in terms of curing and thermal properties, and…
Effective biological application of nanocrystalline semiconductor quantum dots continues to be hampered by the lack of easily implemented and widely applicable labeling chemistries. Here, we introduce two new orthogonal nanocrystal bioconjugation chemistries that overcome many of the labeling issues associated with cu…
Combining first-principles calculations with thermodynamics, we evaluate the structure stability of the boron-tungsten system (WB${}_{x}$), which is a promising superhard material. The highest boride of tungsten, previously denoted WB${}_{4}$ with a three-dimensional boron network, is identified as WB${}_{3}$ with two…
Cerium oxide (CeO(2)) is an important metal oxide used for industrial products. Many investigations about the cellular influence of CeO(2) nanoparticles have been done, but results are contradictory. It has been reported that CeO(2) nanoparticles have an anti-oxidative effect in cells, but it has also been reported th…
Abstract A detailed investigation on the properties of the high‐temperature and low‐temperature modifications of the iron(II) spin‐crossover complex [FeL1(HIm) 2 ] ( 1) and its isotopic deuterium‐labelled analogue [FeL1(DIm) 2 ] ( 1 D), and the pair [FeL2(azpy)] · MeOH/[FeL2(azpy)] · CD 3 OD/[FeL2(azpy)] ( 2· MeOH/ 2·…
Abstract Starting from appropriately halogenated acylpyrroles, a wide range of reactive 4,4‐difluoro‐4‐bora‐3a,4a‐diaza‐ s ‐indacene (BODIPY) derivatives can be obtained. The fluorescent dyes display excellent reactivity in nucleophilic aromatic substitution, transition‐metal‐catalyzed cross‐coupling and copper‐cataly…
We report epitaxial growth of a-plane (11-20) AlInN layers nearly-lattice-matched to GaN. Unlike for c-plane oriented epilayers, a-plane Al_{1-x}In_{x}N cannot be simultaneously lattice-matched to GaN in both in-plane directions. We study the influence of temperature on indium incorporation and obtain nearly-lattice-m…
The holographic mask technique is used to create freely moving electrons with quantized angular momentum. With electron optical elements they can be focused to vortices with diameters below the nanometer range. The understanding of these vortex beams is important for many applications. Here we present a theory of focu…
Photon upconversion based on triplet-triplet annihilation (TTA) of excited triplet molecules is drawing attention due to its applicability for weak incident light, possessing a potential for improving overall efficiencies of solar energy conversion devices. Since energy transfer between triplet levels of different mol…
We report on evaluation of lattice thermal conductivity of GeTe/Sb$_{2}$Te$_{3}$ superlattice (SL) by using femtosecond coherent phonon spectroscopy at various lattice temperatures. The time-resolved transient reflectivity obtained in amorphous and crystalline GeTe/Sb$_{2}$Te$_{3}$ SL films exhibits the coherent $A_{1…