Photoconductivity of CdS nanocluster-doped polymers

“…4 The combination of conducting polymers with host materials having different characteristics opens a way to new hybrid materials showing novel properties. 5,6 Clays, among other hosts, are natural, abundant, and inexpensive minerals that have a unique layered structure, high mechanical strength, and high chemical resistance. Nanocomposite materials have been reported to boost the thermal stability, 7 mechanical strength, 8 and molecular-barrier, 9 flame-resistance, 10 and corrosion-inhibition properties 11 of polymers by incorporating small amounts of clay platelets into the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Structural and thermal characterization of poly(2‐chloroaniline)/red mud nanocomposite materials

Gök

Oğuz

2005

J of Applied Polymer Sci

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ABSTRACT:We report the synthesis and characterization of a series of conducting poly(2-chloroaniline) (P2ClAn)/red mud (RM) nanocomposite materials. The polymerization of 2-chloroaniline in an aqueous medium in the presence of (NH 4 ) 2 S 2 O 8 and RM resulted in the formation of a nanocomposite (P2ClAn/RM). The extent of P2ClAn loading in the composites increased with increasing oxidant and monomer concentrations but decreased with RM. The properties of the nanocomposites were characterized with Fourier transform infrared (FTIR), ultraviolet-visible (UV-vis), conductivity measurements, scanning electron microscopy, thermogravimetric analysis, and differential scanning calorimetry analysis. The inclusion of P2ClAn in the composites was confirmed by FTIR studies. The UV-vis spectra of P2ClAn/RM nanocomposites were similar to that of P2ClAn. The conductivity changed in all the composites prepared under various conditions. Thermogravimetric analyses revealed the enhanced thermal stabilities of the nanocomposites with respect to P2ClAn. Morphological images of the as-synthesized materials were also investigated with scanning electron microscopy and environmental scanning electron microscopy.

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“…[4][5][6][7] Composites of semiconductor nanocrystals with conjugated polymers are also interesting as model systems for photoinduced charge transfer at nanometer-scale interfaces. Previous work has demonstrated that photoinduced charge transfer does occur between a derivative of poly͑p-phenylene vinylene͒ ͑PPV͒ with CdS and CdSe nanocrystals, 8 and photovoltaic devices have been made using composites of the materials as the active medium. 9 Photovoltaic devices using a blend of two conjugated polymers with different electronegativities have also been developed.…”

Section: Introductionmentioning

confidence: 99%