Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 11, pp. 1919−1923.
Pleiades Publishing, Ltd., 2009.
Original Russian Text
L.V. Shapoval, V.V. Gorbunova, S.V. Senkevich, N.V. Sirotinkin, T.B. Boitsova, 2009, published in Zhurnal Prikladnoi Khimii, 2009, Vol. 82,
No. 11, pp. 1770−1774.
INORGANIC SYNTHESIS AND INDUSTRIAL
Deposition of Silver Coatings onto Sodium Borosilicate Glass
L. V. Shapoval
, V. V. Gorbunova
, S. V. Senkevich
, N. V. Sirotinkin
, and T. B. Boitsova
Hertzsen Russian State Pedagogical University, St. Petersburg, Russia
Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, Russia
St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia
Received February 10, 2009
Abstract—A technique for preparation of silver coatings on the surface of sodium borosilicate microspheres was
examined. The strength and stability of the coatings were studied as influenced by pre-irradiated titanium(IV)
tetrabutoxide employed as surface modifier.
Core–shell composite particles have a multilayer
structure comprised of cores having various diameters
and their surrounding nanothick coatings. Modern
materials prepared from core–shell composite particles
have generated great scientiﬁ c and technological interest.
The reason lies in unique properties of nanocomposites,
which can be purposefully varied to suit diversiﬁ ed
applications in materials science. Since recently, the focus
in preparation of such particles has been on synthesis of
composites with dielectric core and metal shell. Such
colloidal particles are potentially suitable as catalysts
, sensors , substrates for surface-enhanced Raman
scattering , and colloidal components with unique
optical properties .
There are published data on procedures for preparation
of nanocomposites with metal shells, in particular, thermal
evaporation , chemical reduction , sonochemical
deposition , inverse micelle method , and sol-gel
One of the problems posed by application of the
particles is metal peeling from the surface of glass or
ceramics acting as dielectric substrates. Preparation of
strong metal coatings with high adhesion performance
requires preliminary modification of the dielectric
There exist the following modiﬁ cation pathways:
– etching with ﬂ uorine-containing reagents, e.g., with
hydroﬂ uoric acid or sodium tetraﬂ uoroborate. In this case,
the dielectric (ceramics, glass) surface acquires certain
– deposition of bifunctional organic compounds which
display afﬁ nity for both the dielectric surface and metal to
be deposited, e.g., 3-aminopropyltrimethoxysilane .
The metal ions get strongly bound to the terminal amino
groups of the modiﬁ ed surface and act as nucleation
sites for subsequent chemical deposition of the metal
– use of activators (tin- , palladium-based ),
in which the metal shell is deposited via redox reaction
occurring in the subsurface layer of the “core“ between
the Sn(II) [or Pd(II)] ions adsorbed on the SiO
surface and the metal ions to be deposited. This technique
requires strictly controlling the acidity of medium, which
affects the reproducibility of the results achieved in metal
There exist techniques for efﬁ cient silver deposition
onto the TiO
particle surface [12, 13]. Katenin et al.
showed  that such titanium compounds can be
deposited onto a dielectric surface by hydrolysis of
titanium(IV) alcoholates, e.g., titanium(IV) tetrabutoxide
Here, we developed a method for deposition of
continuous silver coatings onto the TTB-modiﬁ ed surface
of glass spheres.