9 article(s) from Khokhlov, Alexei R
Figure 1: Temporal variation of pH when 2 mL of the ion mixture (1 M FeCl3 + 0.5 M FeSO4 in 0.1 M HCl) is add...
Figure 2: TEM micrographs showing nanostructures synthesized under a magnetic field of 0.4 T and at 20 °C at ...
Figure 3: Size distribution histograms of nanoparticles obtained from TEM micrographs at different molar rati...
Figure 4: 2D electron diffraction patterns of nanoparticles synthesized under a magnetic field of 0.4 T at 20...
Figure 5: 1D electron diffraction patterns obtained by the radial averaging of 2D patterns (Figure 4) for the referen...
Figure 6: Raman spectra of the samples synthesized at different molar ratios R: R = 2.1 (blue curve) and R = ...
Figure 7: HRTEM micrographs of Fe3O4 nanorods synthesized at R = 2.1 under a magnetic field of 0.4 T and at 2...
Figure 8: HRTEM micrograph of hexagonal iron oxide nanoparticles synthesized at R = 2.1 under a magnetic fiel...
Figure 9: TEM micrographs of iron oxide nanoparticles synthesized at R = 8 under a magnetic field of 0.4 T an...
Figure 1: Sketch of a glass cell with NLC droplets embedded into glycerol with planar (a) and homeotropic (b)...
Figure 2: POM images of NLC droplet structures in the bulk of glycerol obtained at light-emitting diode irrad...
Figure 3: POM images of NLC droplet structures in contact with the solid substrate obtained under light-emitt...
Figure 4: Schematic illustration of dendrimer molecules near the NLC–glycerol interface and of the NLC direct...
Figure 5: Absorption spectra of the extraordinary (solid curves) and ordinary (dashed curves) waves for (a) N...
Figure 6: The trans isomer order parameter, Strans, as a function of the relative concentration of cis isomer...
Figure 1: AFM topography images of Prussian blue layer (left) and Ni-HCF layer (right) deposited on top (cont...
Figure 2: Cyclic voltammogram of three PB-Ni-HCF bilayers deposited on a platinum ultramictroelectrode (0.1 M...
Figure 3: Standard addition curve for hydrogen peroxide recorded at 0 mV vs Ag/AgCl at a platinum UME (diam. ...
Figure 4: SECM image of an H2O2-generating gold electrode (diam. of 25 µm). A and B are 2D plots of images re...
Figure 1: (a) Nafion chain. (b) Nafion sulfonated monomer.
Figure 2: (a) Fragment of a Nafion chain with sulfonic acid groups in dissociated state. The side chains are ...
Figure 3: Typical structures predicted by fully atomistic molecular dynamics simulations for hydrated Nafion ...
Figure 4: Partial structure factors, S(q), of the water phase (red line) calculated for (a) the 524,864-atom ...
Figure 5: Ordered bicontinuous double diamond structure (space group 224), which contains two separate, conne...
Figure 6: (a) Atomistic representation of the 524,864-atom system and (b) the isodensity surface that demonst...
Figure 7: The potential of mean force, W+–(r), and the energetic and entropic contributions, ΔU and –TΔS, to W...
Figure 8: The surfaces (a) ΔU(r,T) and (b) –TΔS(r,T) calculated for the region 2.2 < r < 6 Å via the separati...
Figure 9: Spectral densities of (a) the hindered translational motions of individual cations and (b) the coll...
Figure 10: Model of the ion-conducting channel studied by quantum molecular dynamics. The initial configuratio...
Figure 11: Snapshot of the water-containing Nafion structure obtained after the 200 ps QMD simulation at 298 K...
Figure 12: (a) Pair correlation functions, gOH(r), for the oxygen atoms of the SO3 groups and any proton, at λ...
Figure 13: Sequence of snapshots from the QMD simulation of the ion-conducting nanochannel at different time p...
Figure 14: A 5-ps section of a QMD trajectory showing the change in the relative content of different hydrated...
Figure 15: (a) Normalized time autocorrelation functions for the processes [A](t), where A denotes H3O+, H5O2+...
Figure 16: The Gs(r,t) correlation function is the time-dependent conditional probability density that a parti...
Figure 1: Chemical structure of poly[oxy-3,3-bis(4′-benzimidazol-2″-ylphenyl)phtalide-5″(6″)-diyl] (PBI-O-PhT...
Figure 2: Equivalent circuit with a transmission line for modelling the impedance response of the active laye...
Figure 3: Small angle X-ray scattering results for the different types of composites and the reference membra...
Figure 4: FT-IR spectra of a mixture of BI with Zr(acac)4 (4:1 molar ratio, upper spectrum) and of the produc...
Figure 5: Possible mechanism of the crosslinking process of PBI by Zr(acac)4 and further doping with PA.
Figure 6: Change of the relative membrane thickness in a series of five consecutive heating/cooling cycles. T...
Figure 7: Thermal expansion coefficients of the composite membranes.
Figure 8: Performance of fuel cells based on PBI membranes of different types. Air is used as an oxidant, T =...
Figure 9: Oxidation current of hydrogen diffusing through the membrane for PBI-O-PhT with 0.75 wt % Zr(OAc)4....
Figure 10: Membrane resistances as functions of the current density for fuel cells with different PBI membrane...
Figure 11: Distributed cathode active layer resistances as functions of current density for fuel cells with di...
Figure 12: The double layer capacitance as a function of the current density for fuel cells with different PBI...
Figure 13: Polarization resistance (the sum of charge-transfer and mass-transfer resistances) as a function of...
Figure 14: 2000-hour stability test of a composite PBI-O-PhT + 0.75 wt % Zr(acac)4 membrane and the reference ...
Figure 1: Illustration of the transition from a wormlike structure through a cylindrical micelle down to a sp...
Figure 2: Schematic representation of coil–LC comb copolymer.
Figure 3: Stable morphologies in coil–LC comb copolymer melts.
Figure 4: Schematic representation of some of the possible nanostructures formed by binary combs with strongl...
Figure 5: Schematic representation of the disc-shaped structure.
Figure 6: Schematic representation of torus-shaped structure.
Figure 7: Schematic representation of a stripe-shaped structure.
Figure 8: Schematic representation of an inverse torus-like structure.
Figure 9: Schematic representation of “holes”
Figure 10: Phase diagram of the film in terms of the fraction of B side chains, β = NB/(NA + NB), and the spre...
Figure 11: Aggregation number Q as a function of the spreading parameter SB at different values of β: β = 0.64...
Figure 1: Various morphological organization examples of fibrillar aggregates that can be formed by polymer b...
Scheme 1: Synthesis of quaterthiophene-β-sheet-peptide hybrid 1 [22]; (i) Hg(II)OAc2, CHCl3, 0 °C → r.t., 14 h; I2...
Scheme 2: Synthesis of quaterthiophene-β-sheet-peptide hybrid 6 [23]; (i) POCl3, DMF, dichloroethane, reflux, 3 h...
Figure 2: The A–B–A-type hybrid 1 in the deprotected, but still kinked, form 1'.
Figure 3: AFM height images of hybrid 1' on mica from a 1:1 DCM/MeOH solution; a) left: Network of fibers aft...
Figure 4: AFM images of the switched PEO–peptide–quaterthiophene–peptide–PEO compound 1 [22].
Figure 5: A–B system 6' in deprotected, but still kinked, form.
Figure 6: AFM height images of 6' on mica from a 1:1 DCM/MeOH solution. a) left: Image of fibers obtained aft...
Figure 7: AFM height and amplitude images of fully switched PEO–peptide–quaterthiophene 6 on mica [23]. a) left: ...
Figure 8: Calculated minimum energy conformation of oligothiophene–oligopeptide hybrid 1' in the three Cartes...
Figure 9: a) Schematic representation of hybrid 1. Black coils: PEO chains, green arrow: Peptide strand; yell...
Figure 10: Model for the self-assembly of hybrid 6', based on the theoretically calculated conformation of 6' ...
Figure 11: Theoretical analysis workflow (see text).
Figure 12: Constructed periodic crystalline cells for (a) antiparallel and (b) parallel arrangement of peptide...
Figure 13: Possible options for the arrangement of β-sheets in a cross-β motif. Two identical sheets can be cl...
Figure 14: Schematic representations of constructed double-layer periodic arrangements from the hybrid molecul...
Figure 15: Snapshots of four different types of fibrils at the initial conformation (a1, b1, c1, d1) and after...