Abstract: Nanomaterials are of great importance for their versatile applications in gas sensors,
solar cells and photocatalysis due to their unique optical, electrical and catalytic properties. Titania
derived nanotubular and nanospherical particles with a titanate structure were synthesized using a
hydrothermal procedure in the presence of very concentrated solutions of KOH and NaOH
respectively. Both nanostructures were found to exhibit relatively large specific surface areas, i.e.
280 and 303 m2/g for materials treated in NaOH and KOH respectively. The morphological and
structural properties were characterised by TEM, SEM, Raman spectroscopy and XRD.
Abstract: The magnetic properties of an ultrathin cobalt film were modified by a focused
femtosecond pulsed laser beam. The Co wedge, with a thickness ranging from 0 to 2 nm,
sandwiched by Au films was prepared using ultra-high vacuum magnetron sputtering on a mica
substrate. The modifications of the laser induced magnetic anisotropy were investigated using
magneto-optic Kerr microscopy and MFM/AFM techniques. The laser induces: (i) local
reorientation of magnetization from an in-plane to a perpendicular state and (ii) an increase of the
coercivity field. A corresponding increase of the perpendicular magnetic anisotropy is discussed
considering an improvement of the Co/Au interfaces.
Abstract: First principle simulations for the nanosystems Kn(C60)2, (n = 1, 2) composed of two
fullerene (C60) molecules and one or two potassium (K) atoms have been undertaken. A very
effective delocalization of the 4s1 valence electron of potassium was observed, the potassium atom
in practice becomes an ion. The adsorption binding energy of potassium atom(s) is Ea = -
1.923 ± 0.04 eV, - 3.819 ± 0.04 eV for K(C60)2 and K2(C60)2, respectively. The reported large
values of adsorption energy should cause a significant change in electronic properties of alkali
doped fullerene clusters.
Abstract: The nanosystem composed of only as few as seven endohedral fullerene K+@C60
molecules was simulated using the MD method. The interaction was taken to be the full site-site
pairwise additive Lennard-Jones (LJ) potential, which generates both translational and anisotropic
rotational motions of each endohedral fullerene. The atomically detailed MD simulations allow the
dynamics of the motion of K+@C60 molecule inside the cluster to be analysed. The radial
distribution function, the mean square displacement, the translational velocity correlation functions
and the Lindemann index of endohedral fullerene have been calculated for several energies of the
nanosystem. The solid/liquid phase transition and the existence of the liquid phase in the
endohedral potassium ion fullerene cluster was found.
Abstract: The molecular dynamics (MD) technique was used to investigate the nano droplet
composed of twenty mesogene molecules 4-cyano-4-n-pentylbiphenyl (5CB). The 5CB molecules
were treated as rigid bodies, the intermolecular interaction was taken to be the full site-site pairwise
additive Lennard-Jones (LJ) potential plus a Coulomb interaction. The radial distribution functions
in the temperature range from 150 to 400 K, were calculated as well as the linear and angular
velocity autocorrelation functions. In addition the total dipole moment autocorrelation function and
dielectric loss of (5CB)22 mesogene cluster were calculated and the liquid crystal ordering in the
nanoscale system was studied up to its vaporization temperature.
Abstract: This paper describes the preparation, characterization and properties of nanostructured
composite materials based on poly(butylene adipate-co-polycaprolactam) (PBA-co-PCL)/multiwalled
carbon nanotubes (MWCNTs) and polycaprolactone (PCL)/MWCNTs. The
polymer/MWCNTs nanocomposites were prepared by mixing the polymers with various amounts
of MWCNTs using both solution and melt blending processes. The dispersion of MWCNTs into the
polymer matrix was analyzed by transmission electron microscopy (TEM) and the thermal stability
of the nanocomposites was studied by thermal gravimetric analysis (TGA). Differential scanning
calorimetry (DSC) was used to study the crystallization and melting behaviour of the polymer
matrices containing the MWCNTs.
Abstract: A novel method to synthesize carbon fibres using low-current electrical-discharge plasma
in hydrocarbon vapours is presented in the paper. The low-current arc discharge of positive polarity
was generated between a stainless steel needle, and a nickel alloy plate, over a voltage range from 2
kV to 30 kV. The discharge was stabilised by a high series resistance (1 – 12.5 M'). The
experiments were carried out in an argon atmosphere at normal temperature and atmospheric
pressure. The arc discharge of current in the range of 1 to 4 milliamps was found to be a potentially
effective method for the production of carbon fibres. The diameter of the fibres varied from about
20 to 120 μm with a growth rate of about 0.5 mm/s.
Abstract: A small titanium-decorated fullerene cluster (C60[TiH2]6)7 was studied by MD
simulation over a wide range of energy, from the solid state to the vaporization of the nanosystem.
The low energy, solid state structure of the cluster was obtained as a deformed pentagonal
bipyramid. Several physical characteristics: the radial distribution function, the mean square
displacement, the translational velocity autocorrelation function, translational diffusion coefficient,
Lindemann index, etc., were calculated for a wide range of energy in the system.
Abstract: Atherosclerosis, which is caused by endothelial dysfunction, vascular inflammation, and
the build-up of lipids, cholesterol, calcium, and cellular debris within the intima of the vessel wall,
is one of the most important complications of health. Vascular stenting is the procedure of
implanting a thin tube into the site of a narrow or blocked artery due to atherosclerosis. However,
the application of vascular stents using conventional metals is limited because the implantation
process will cause significant injury to the vascular wall and endothelium, which functions as a
protective biocompatible barrier between the tissue and the circulating blood, resulting in neointima
hyperplasia followed by the development of long-term restenosis. The objective of this in vitro
study was to investigate the endothelial cell function, especially their adhesion behaviour, on highly
controllable features on nanostructured surface. Considering the importance of the endothelium
and its properties, highly controllable nanostructured surface features of titanium, a popular
vascular stent metal, were created using E-beam evaporation to promote endothelialization and to
control the direction of endothelial cells on vascular stents. Endothelial cells are naturally aligned
with the blood flow in the body. In this manner, the present in vitro study provides much promise
for the use of nanotechnology for improving metallic materials for vascular stent applications.
Abstract: The paper presents experimental results of electrospray deposition of nanopowder onto
microfibers. The process is designed to form fibrous filters with an enhanced collection efficiency
in the submicron range by covering the fabric with a catalytic material. Polyamide fibres were
coated with Al2O3, ZnO, MgO, or TiO2 nanoparticles. The structures obtained were porous at the
nanometer scale which increased the total surface area of the catalyst.