Photonic crystals in biology

Poster Session, Tuesday, June 15
Theme A1 - B702
Synthesis, Characterization of The Amphiphilic Polymer Composites Containing
SiO 2 Nanoparticles
Özlem A. Kalayc 1* , Baki Hazer 2 , Turgay Atalay 1
1 Department of Physics, Zonguldak Karaelmas University, Zonguldak 67100, Turkey
2 Department of Chemistry, Zonguldak Karaelmas University, Zonguldak 67100, Turkey
Abstract—The synthesis, spectroscopic characterization, SiO 2 nanoparticles embedded in novel amphiphilic comb-type graft
copolymers having good film-forming properties have been described. Amphiphilic comb-type graft copolymers were
synthesized by the reaction of chlorinated polypropylene (PP) (Mw = 140,000 Da) with polyethylene glycol (PEG) (Mn =
2,000 Da) at different molar ratios. SiO 2 nanoparticles embedded graft copolymers were prepared by reducing solutions of the
salts of SiO 2 and the copolymer in tetrahydrofuran.
The interest in the synthesis and characterization of
nanoparticles embedded amphiphilic block and graft
copolymers has increased recently due to their possible
applications in the fields of biology and material sciences [1].
Size provides important control over many of the physical and
chemical properties of nanoscale materials including
luminescence, conductivity, and catalytic activity allowing
application of these species in optical systems, catalysis, and
biomedical technology [2].
In this study, a series of various polypropylene- g-
polyethyleneglycol (PP-g-PEG2000) graft copolymers was
prepared by using chlorined- polypropylene and
polyethyleneglycol 2000. SiO 2 inorganic salts aqueous
solutions were mixed into tetrahydrofurane solution of
amphiphilic copolymer to obtain inorganic nanoparticles
embedded into polymer composites [3].The concentration of
the SiO 2 nanoparticles in the graft copolymer is also listed in
Table 1. Solution properties, UV-Vis, Fluorescence spectrum
analysis, Scanning Electron Microscopy were used to
characterize polymer composites.
Table 1.Prepartion conditations of the hybrid polymers.
Sample Silicat Au +3 NaBH 4
Name (Drop) (Drop) (Drop)
S1 8 8 10
Figure 3. SEM micrograph of the hybrid polymer samples.
The SiO 2 nanoparticle embedded copolymers in toluene was
observed at a maximum wavelength (max) of 307 and 529
nm in the UV–VIS absorption spectra, respectively (Fig. 1.).
Fluorecence spectrum curve of nanoparticle embedded
amphiphilic graft copolymer is shown Fig. 2. The average
particle diameter of nanoparticles were found to be 20 nm
from the high resolution scanning electron microscopy (SEM)
and energy dispersive X-ray spectroscopy (EDS). SEM
micrograph of the SiO 2 nanoparticles embedded graft
copolymer sample is shown in Fig. 3.
Figure 1. UV-visible spectra of the hybrid polymer samples.
Figure 2. Fluorescence spectra of the hybrid polymer samples.
This study was supported by Zonguldak Karaelmas
University Scientific Research Projects (grant# 2008-70-01-
01, grant# 2008-13-02-02, grant# 2008-13-03-01).
*Corresponding author: ozlem_altunordu@yahoo.com.tr
[1] Alivisatos AP (1996) Perspectives on the physical chemistry of
semiconductor nanocrystals. J Phys Chem 100:13226–13239
[2] El-Sayed MA (2001) Some interesting properties of metals
confined in time and nanometer space of different shapes. Acc Chem
Res 34:257–264
[3] Kalayc, Ö.A., Cömert B.F., Hazer, B., Atalay, T., Cavicchi, A.
K., Çakmak, M, 2009. Synthesis, characterization, and antibacterial
activity of metal nanoparticles embedded into amphiphilic comb-type
graft copolymers, Polym. Bull.,DOI:10.1007/s00289-009-0196-y
6th Nanoscience and Nanotechnology Conference, zmir, 2010 297