6,541 research outputs found
Self-assembled metallic nanoparticle template --- a new approach of surface nanostructuring at nanometer scale
In the present work, the formation of silver and copper nanostructures on
highly oriented pyrolytic graphite (HOPG) modified with self-assembled gold
nanoparticles (Au NPs) is demonstrated. Surface patterning with nanometer
resolution was achieved. Different methods such as field emission scanning
electron microscopy (FEGSEM), energy dispersive spectrometry (EDS) and X-ray
photoelectron spectroscopy (XPS) were used to illustrate a selective deposition
of silver and copper on Au NPs. The mechanism of silver and copper ions
reduction on Au NP with -dodecanethiol coating is discussed.Comment: 6 pages, 3 figure
Estimate of the possibility of conducting mass spectrometric measurements of the matter of lunar surface
Electron beams studied for use in lunar soil spectrometric analysi
On the relationship between the phases of 27-day total ozone and solar activity indices in different latitudinal zones
The dynamics of 27 day total ozone variations during and 11 year solar activity cycle at high and low latitudes was analyzed. The calculations were made using a specially worked out program permitting, besides the determination of the amplitudes and phases, the observation of the coherence of phases in any time interval. To characterize solar activity, solar radio-flux at 10.7 cm was used. The results of the calculation of total ozone phases difference and those of the index F(sub 10.7), as well as the amplitudes of the 27 day variations of these parameters are presented
Six-loop expansion study of three-dimensional -vector model with cubic anisotropy
The six-loop expansions of the renormalization-group functions of
-vector model with cubic anisotropy are calculated within the minimal
subtraction (MS) scheme in dimensions. The
expansions for the cubic fixed point coordinates, critical exponents
corresponding to the cubic universality class and marginal order parameter
dimensionality separating different regimes of critical behavior are
presented. Since the expansions are divergent numerical estimates
of the quantities of interest are obtained employing proper resummation
techniques. The numbers found are compared with their counterparts obtained
earlier within various field-theoretical approaches and by lattice
calculations. In particular, our analysis of strengthens the existing
arguments in favor of stability of the cubic fixed point in the physical case
On the D-wave state component of the deuteron in the Nambu-Jona-Lasinio model of light nuclei
The D-wave state component of the neutron-proton bound state in the deuteron
is calculated in the Nambu-Jona-Lasinio model of light nuclei - the
relativistically covariant quantum field theoretic approach to the description
of low-energy nuclear forces. The theoretical value of the fraction of the
D-wave state relative to the S-wave state is equal to eta_d = 0.0238. This
agrees well with the phenomenological value eta_d = 0.0256(4) quoted by
Kamionkowski and Bahcall (ApJ. 420, 884 (1994)).Comment: 7 pages, latex, no figure
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