Materials Literature
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Abstract Modulation of color change and photocyclization of diarylethene with metal complex is described. A diarylethene derivative with 4‐(ethylideneamino) phenol group 1a is prepared and photochromic behavior is investigated. It is found that 1a exhibits ring‐opening and ring‐closing photoisomerization with UV/Vis l…
Sorption of Ag, Cu, Pb, Cd, Fe and Mg cations on multi-walled carbon nanotubes (MWCNTs) produced by CVD method has been investigated in static and dynamic modes. Correlation between synthesis temperature of MWCNTs and their sorption capacity has been demonstrated. It was shown that concentration of carbonyl groups on…
A facile “click chemistry” approach to functionalize 2D macromolecules of graphene oxide nanosheets with poly (ethylene glycol) of different molecular weights, polystyrene, palmitic acid and various amino acids was presented. FTIR, TGA, Raman spectroscopy, XPS, XRD, TEM, AFM and SEM were utilized to characterize the p…
Transparent coatings consisting of a Y 2 O 3 :Eu 3+ ,Bi 3+ layer (bottom) and a porous SiO 2 layer (top) with high and low refractive index, respectively, were fabricated on quartz glass substrates by a sol–gel dip‐coating method. The thickness of both the layers and the refractive index of the SiO 2 layer were design…
X-ray absorption near-edge structure (XANES) spectroscopy has been used for comparative investigation of the electronic structure of pristine and fluorinated single-walled carbon nanotubes (SWCNTs) before and after annealing. The SWCNTs were produced by catalytic chemical vapor deposition method and fluorinated using…
We investigate fluorescence blinking of individual RC-LH1 (reaction-centre-light-harvesting 1) complexes from the photosynthetic purple bacterium Rhodopseudomonas palustris. For both the on- and off-periods the telegraph-like intermittency of the fluorescence intensity follows power-law statistics with exponents betwe…
-isopropyl acrylamide) (pNIPAM) undergoes a sharp property change in response to a moderate thermal stimulus at physiological temperatures. In this work, we constructed a radio frequency (RF) plasma reactor for the plasma polymerization of pNIPAM. RF deposition is a method that coats surfaces of any geometry producing…
Abstract Polycarbosilanes were synthesized by hydrosilylation reaction of A2 monomer containing bis SiH moieties and Bn (n = 2, 3, and 4) monomers containing di‐, tri‐, and tetra‐vinyl groups in the presence of Karstedt's catalyst. The corresponding linear polycarbosilanes (LPC) and hyperbranched polycarbosilanes (HB…
Fracture mechanics at the nanoscale level is a very complex phenomenon, whereas the macroscale fracture mechanics approach can be employed for nanoscale to simulate the effect of fracture in single-walled carbon nanotubes (SWCNTs). In this study, an extended finite element method is used to simulate crack propagation…
We have characterized the spectroscopic magneto-optical response of a ${({\text{Pr}}_{0.4}{\text{La}}_{0.6})}_{0.7}{\text{Ca}}_{0.3}{\text{MnO}}_{3}$ thin film in the visible. We find, in addition to the conventional linear magneto-optical response, two distinct nonlinear contributions corresponding to the quadratic m…
CdSe-core, ZnS-capped semiconductor nanoparticles - quantum dots (QDs) - have been at the forefront of biomedical nanotechnology research thanks to their unique optical Η photophysical properties. In the present study the impact of the particle coating and size on their in vivo fate after intravenous (IV) injection in…
Abstract A series of shape‐memory polyurethanes based on poly(ϵ‐caprolactone) diol were prepared with novel hydroxyl‐terminated hyperbranched polyurethanes as crosslinkers and were characterized by Fourier transform infrared spectroscopy, 1H‐NMR, gel permeation chromatography, differential scanning calorimetry, scanni…
An important area of research in nanotechnology deals with the synthesis of nanoparticles of different chemical compositions, sizes and controlled monodispersity. Currently, there is a growing need to develop environmentally benign nanoparticle synthesis in which no toxic chemicals are used in the synthesis protocol.…
The mechanical properties of the single graphene membranes were studied by classical molecular mechanics (MM) simulation method. The graphene membranes of various diameters from 38 Å to 140 Å were calculated, and Young's modules were estimated. Graphene membranes with different concentration of vacancy defects were st…
A combination of thermal oxidation and thermal recovery was used to obtain transparent single-walled carbon nanotube (SWCNT) films with low sheet resistance. The process resulted in the effective removal of impurities and healing of defects in the SWCNTs, thus markedly increasing their conductivity. SWCNT samples befo…
Abstract Conducting polypyrrole electrodes were prepared by electrochemical polymerization of pyrrole on vacuum‐metallized glass substrates. These electrodes were modified by doping with a range of metal halides as dopant ions having different electronegativity. Electrochemical reduction of nitrobenzene using these el…
Quantum dot micelles (pQDs) with a paramagnetic coating are promising nanoparticles for bimodal molecular imaging. Their bright fluorescence allows for optical detection, while their Gd payload enables visualization with contrast-enhanced MRI. A popular approach in molecular MRI is the targeting of abundantly expresse…
Thin‐film La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ (LSCF58428) exhibits high oxygen permeability due to its high ionic and electronic conductivity. In order to increase the oxygen flux, a thin‐film membrane on a structural substrate is beneficial. Different Ni‐based alloys were studied as potential substrate materials. The…
In this paper, a comprehensive experimental study and modeling of the nonlinear behavior of Terfenol-D/PZT-5A magnetoelectric laminate composites is reported. Magnetostriction versus magnetic field of an individual Terfenol-D sample of dimensions length = 22 mm, width = 19 mm, thickness = 0.683 mm, and polarization ve…
The complete (14)N nuclear quadrupole resonance (NQR) spectra have been measured in the two polymorphic crystalline phases of the molecular complex isonicotinamide-oxalic acid (2:1) by nuclear quadrupole double resonance. The observed NQR frequencies, quadrupole coupling constants, and asymmetry parameters (η) have be…