Photonic crystals in biology

P
Poster Session, Tuesday, June 15
Theme A1 - B702
Langmuir–Blodgett Films of Tripodal-oxy-Schiff Base
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Ulkay Hilal GabberUP P*, Ziya Erdem KoçP P, Leyla GürfidanP P, Ozlem OuzhanP P, Mustafa ErsözP
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PSelcuk University Department of Chemistry Campus 42075 Konya Turkey,
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Abstract-In this study, self-assembled monolayers (SAMs) of Schiff base on Si wafer was obtained through a Langmuir Blodgett method
between [2,4,6-tris(p-formylphenoxy)-1,3,5-triazine] (TRIPOD) and 3-amonopropyl trimethoxysilane (APTES). The surfaces parameters
where analyzed by contact angle measurement sand atomic force microscopy (AFM), surface infrared spectroscopy (FTIR) etc.
An important class of compounds consists of substituted
s-triazine derivatives which have anticancer, antitumor,
antiviral and antifungal activity. These compounds have
been used in the treatment of depression and hence gained
a considerable importance. These are valuable bases for
estrogen receptor modulators and are also used as bridging
agents to synthesize herbicides and in the production of
drugs or polymers [1].
In this study, we were synthesized of tripodal-oxy-Schiff
base derivatived which was named [2,4,6-tris(pformylphenoxy)-1,3,5-triazine].
Monolayers of schif base
derivative was formed at the air/water interface using the
Langmuir technique and was then investigated by onto Si
wafers and studied using microscopic and spectroscopic
methods. Silane monolayer is prepared on Si wafer
surfaces using the techniques of Langmuir Blodgett
deposition and solid liquid chemical adsorption.
Two methods are commonly used to prepare silanized
surfaces: Langmuir–Blodgett deposition and solution
adsorption [2]. The
Langmuir–Blodgett technique offers the advantage of
maintaining accurate control over surface pressure during
the deposition process. The LB technique is a valuable
method to produce ultra-thin films. LB technology is
known as a useful method for the formation of welloriented
film of bio/organic material on a solid substrate,
because it can control the degree of order [3]. LB films are
fabricated by passing a substrate through the surface of an
aqueous subphase on which is floating and ordered
monomolecular organic layer. A film deposition is called
reactive if there are strong intermolecular interactions
between the monolayer and the substrate or between the
depositing monolayer and the previously deposited
monolayer [4]. Langmuir–Blodgett deposition was
performed for selected compressed films. The substrates
were Si wafers that were pretreated with an oxidizing
mixture o 50:50 hydrogen peroxide and sulfuric acid for
15 min followed by rinsing with Milli-Q water. In each
case, deposition was performed immediately after the
target pressure was attained. Varying surface pressures
were used during deposition, and deposition speeds
between 5 and 10 mm/min were used. In each case only a
single molecular layer was deposited, and the
corresponding transfer ratio was recorded.
A 250 μl of solution is spread over a LB at air/water
interface and a time of 30 min is allowed for solvent
evaporation. The surface pressure against area/molecule
isotherm was recorded using simple fitler paper. The
transfer pressure is also controlled.
In summary, this study demonstrates the construction of
self-assembled arrays of silica particles on the micro- and
nanopatterns reflecting the structures of the functionalized
si wafer fabricated from LB films. The silica particles on
the patterns of the functionalized templates are strongly
adsorbed due to the electrostatic interaction between the
amino groups of silica particles and the functional groups
on the Schiff bases. The present method will be important
in the fabrication of nanoparticles at the
micrometer/nanometer length scale for the applications to
sensors, photonic materials, optoelectronic materials and
catalysts.
This project was supported by To COST 43 and
TUBITAK, (Grant No: TBAG-U/182 (106T718).
*Corresponding author: HTihilalg@gmail.comT
[1] Z.E. Koc and H. I. Ucan, transit. Met. Chem, 32 597
(2007).
[2] K. Paso, R. M.L. Helberg, S. Raae, J. Sjoblom, Journal of
Colloid and Interface Science 325 228 (2008).
[3] J. Cabaj, J. Sooducho, A. Nowakowska-Oleksy, Sensors
and Actuators B 143 508 (2010).
[4] L.Y. Zhang, M. P. Srinivasan, Coll. Surf. A: Physicochem.
Eng. Asp. 193 15 (2001).
6th Nanoscience and Nanotechnology Conference, zmir, 2010 279