Materials Literature
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We report tunneling spectroscopy experiments on a bilayer graphene double quantum dot device that can be tuned by all-graphene lateral gates. The diameter of the two quantum dots are around 50 nm and the constrictions acting as tunneling barriers are 30 nm in width. The double quantum dot features addition energies on…
The Leidenfrost effect—prolonged evaporation of droplets on a superheated surface—happens only when the surface temperature is above a certain transitional value. Here, we show that specially engineered droplets—liquid marbles—can exhibit a similar effect at any superheated temperatures (up to 465 °C tested in our exp…
A new way of identification of minerals was suggested.The identification was based on chemometric analysis of measured IR spectra of selected minerals.IR spectra were collected using diffuse reflectance technique.The discriminant analysis and principal component analysis were used as chemometric methods.Five statistic…
Substitution of La(3+) by Sr(2+) in the double perovskite La(2)CoTiO(6) yields materials of the La(2-x)Sr(x)CoTiO(6) series showing a significant amount of trivalent cobalt ions when prepared at ambient atmosphere. The as-prepared compounds can be reduced in severe conditions retaining the perovskite structure while i…
Microwave induced rapid decomposition of nitromethane at low temperature exfoliates the graphene sheets from the FeCl(3) and CH(3)NO(2) co-intercalated graphite compound without creating many defects and functional groups. This approach provides a scalable method for high-quality graphene materials via low-temperature…
The synthesis and photophysical characterization of a subphthalocyanine-polymethine cyanine panchromatic light harvester is described. The new conjugate shows the extraordinary absorption features of both constituents and reveals electron transfer that evolves from both constituents.
Highly effective separation of colloidal gold nanorods/nanoplates from co-produced isotropic nanoparticles has been achieved by selective precipitation triggered by salt.
Shape memory alloys (SMAs) are used in several technological applications thanks to their unique properties: superelasticity and shape memory effect. In recent decades, many efforts have been made to improve performance of SMA wires in order to utilize them as thermal actuators for hundreds thousands cycles. Near-equi…
Photoisomerization is an important reaction that confers photoresponsive functionality on nanoparticles. Although photoisomerization of molecules forming self-assembled monolayers on two-dimensional surfaces or three-dimensional clusters has been studied, a detailed picture of interactions of molecules undergoing isom…
Despite the practical need, no models exist to predict contact angles or wetting mode of surfactant solutions on rough hydrophobic or superhydrophobic surfaces. Using Gibbs' adsorption equation and a literature isotherm, a new model is constructed based on the Wenzel and Cassie equations. Experimental data for aqueous…
In this study, we have selectively introduced three types of chemical functional groups, namely nitrophenyl (C6H4NO2), aminophenyl (C6H4NH2) and benzoic acid (C6H4COOH), on the sidewalls of multiwalled carbon nanotubes (MWCNTs) with the aim to find the optimal functionalization of MWCNTs for the most desirable intermo…
In this communication, we report that 9-aryl-1,2-dihydropyrrolo[3,4-b]indolizin-3-one (Seoul-Fluor) can serve as a potential platform for colorful ratiometric fluorescent pH sensors by simple incorporation of pH responsive elements on Seoul-Fluor. Seoul-Fluor-based fluorescent pH sensors allow the emission- and pH-tun…
Algal communities from the Algeti National Park in eastern Georgia were studied between 2005 and 2008. The algal species diversity comes from 77 algological samples and includes 315 species and infraspecies, which belong to 7 taxonomical divisions. Of these findings, 295 species are reported for the first time in the…
The electrical conduction mechanism of mixed conductive perovskite oxides, La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ), for cathode materials of solid oxide fuel cells has been investigated from electronic structural changes during oxygen vacancy formation. La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ) was annealed under various oxygen p…
Fawley M.W., Fawley K.P. and Hegewald E. 2011. Taxonomy of Desmodesmus serratus (Chlorophyceae, Chlorophyta) and related taxa on the basis of morphological and DNA sequence data. Phycologia 50: 23–56. DOI: 10.2216/10-16.1The green alga Desmodesmus serratus is a common small Desmodesmus species. The highly variable mor…
1,6-Bis(trimethylammonium)hexane bis(trihalides) and mixed bis(trihalides) have been synthesized by treating the corresponding dihydrated halides with molecular dihalogens under gas–solid and solution conditions. Despite the starting halides being non-porous, the trihalide syntheses occur homogeneously, in quantitativ…
Understanding the self-discharge (SDC) mechanism is crucial for obtaining supercapacitors with tunable energy retention. Supercapacitors built with free standing single-walled carbon nanotube (SWNT) macro-films and 1M TEABF4/PC electrolyte exhibit a unique divided potential driving SDC discharge process as demonstrate…
In the present investigation, the crystallization and phase transition behaviours of normal alkane (n-docosane) in microcapsules with a mean diameter of 3.6 μm were studied by the combination of differential scanning calorimetry (DSC), temperature-dependent X-ray diffraction (XRD) and variable-temperature solid-state…
In this study, multilayers from polyethylene imine, heparin and chitosan are prepared at three different pH values of 5, 7 and 9. Water contact angle and quartz microbalance measurements show that resulting multilayers differ in terms of wetting behaviour, layer mass and mechanical properties. The multilayer is then f…
This paper is a review article covering various methods reported on synthesis of ?-SiAlON based ceramic materials and on their net-shape consolidation into radome structures. It also identifies a composition out of a wide-range ?-Si6-zAlzOzN8-z (where z = 0-4.1) solid solution suitable for radome applications and disc…