Polystyrene-co-maleic acid/CdS nanocomposites: Preparation and properties
Апстракт
Composites of CdS nanoparticles confined in a polystyrene-co-maleic acid (PS-co-MAc) matrix have been prepared and characterized. It was shown that the acid groups of the co-polymer could be successfully used to control the aggregation of the nanoparticles, because they act as coordinate sites for Cd ions. UV-VIS measurements showed a blue shift of the absorption threshold, proving the presence of nanoparticles. An average size of the nanoparticles of about 4 nm is estimated from the change in band gap energy. Although the FTIR spectrum of the nanocomposite showed the presence of C-S bonds, a broad emission originating from surface recombination sites are noticed. DSC and TGA measurements revealed changes in thermal properties upon incorporation of nanoparticles. No thermal transition was observed in the nanocomposite, while the pure co-polymer exhibits a glass transition at 190 degrees C. In the presence of nanoparticles the onset of the thermal decomposition of the matrix is also shi...fted by 50 degrees C towards a higher temperature. (c) 2005 Elsevier Ltd. All rights reserved.
Кључне речи:
nanostructures / chemical synthesis / infrared spectroscopy / differential scanning calorimetry (DSC) / optical propertiesИзвор:
Journal of Physics and Chemistry of Solids, 2005, 66, 7, 1302-1306
DOI: 10.1016/j.jpcs.2005.05.002
ISSN: 0022-3697
WoS: 000231636300026
Scopus: 2-s2.0-23844514407
Колекције
Институција/група
VinčaTY - JOUR AU - Nair, PS AU - Radhakrishnan, T AU - Revaprasadu, N AU - Kolawole, GA AU - Luyt, AS AU - Đoković, Vladimir PY - 2005 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2923 AB - Composites of CdS nanoparticles confined in a polystyrene-co-maleic acid (PS-co-MAc) matrix have been prepared and characterized. It was shown that the acid groups of the co-polymer could be successfully used to control the aggregation of the nanoparticles, because they act as coordinate sites for Cd ions. UV-VIS measurements showed a blue shift of the absorption threshold, proving the presence of nanoparticles. An average size of the nanoparticles of about 4 nm is estimated from the change in band gap energy. Although the FTIR spectrum of the nanocomposite showed the presence of C-S bonds, a broad emission originating from surface recombination sites are noticed. DSC and TGA measurements revealed changes in thermal properties upon incorporation of nanoparticles. No thermal transition was observed in the nanocomposite, while the pure co-polymer exhibits a glass transition at 190 degrees C. In the presence of nanoparticles the onset of the thermal decomposition of the matrix is also shifted by 50 degrees C towards a higher temperature. (c) 2005 Elsevier Ltd. All rights reserved. T2 - Journal of Physics and Chemistry of Solids T1 - Polystyrene-co-maleic acid/CdS nanocomposites: Preparation and properties VL - 66 IS - 7 SP - 1302 EP - 1306 DO - 10.1016/j.jpcs.2005.05.002 ER -
@article{ author = "Nair, PS and Radhakrishnan, T and Revaprasadu, N and Kolawole, GA and Luyt, AS and Đoković, Vladimir", year = "2005", abstract = "Composites of CdS nanoparticles confined in a polystyrene-co-maleic acid (PS-co-MAc) matrix have been prepared and characterized. It was shown that the acid groups of the co-polymer could be successfully used to control the aggregation of the nanoparticles, because they act as coordinate sites for Cd ions. UV-VIS measurements showed a blue shift of the absorption threshold, proving the presence of nanoparticles. An average size of the nanoparticles of about 4 nm is estimated from the change in band gap energy. Although the FTIR spectrum of the nanocomposite showed the presence of C-S bonds, a broad emission originating from surface recombination sites are noticed. DSC and TGA measurements revealed changes in thermal properties upon incorporation of nanoparticles. No thermal transition was observed in the nanocomposite, while the pure co-polymer exhibits a glass transition at 190 degrees C. In the presence of nanoparticles the onset of the thermal decomposition of the matrix is also shifted by 50 degrees C towards a higher temperature. (c) 2005 Elsevier Ltd. All rights reserved.", journal = "Journal of Physics and Chemistry of Solids", title = "Polystyrene-co-maleic acid/CdS nanocomposites: Preparation and properties", volume = "66", number = "7", pages = "1302-1306", doi = "10.1016/j.jpcs.2005.05.002" }
Nair, P., Radhakrishnan, T., Revaprasadu, N., Kolawole, G., Luyt, A.,& Đoković, V.. (2005). Polystyrene-co-maleic acid/CdS nanocomposites: Preparation and properties. in Journal of Physics and Chemistry of Solids, 66(7), 1302-1306. https://doi.org/10.1016/j.jpcs.2005.05.002
Nair P, Radhakrishnan T, Revaprasadu N, Kolawole G, Luyt A, Đoković V. Polystyrene-co-maleic acid/CdS nanocomposites: Preparation and properties. in Journal of Physics and Chemistry of Solids. 2005;66(7):1302-1306. doi:10.1016/j.jpcs.2005.05.002 .
Nair, PS, Radhakrishnan, T, Revaprasadu, N, Kolawole, GA, Luyt, AS, Đoković, Vladimir, "Polystyrene-co-maleic acid/CdS nanocomposites: Preparation and properties" in Journal of Physics and Chemistry of Solids, 66, no. 7 (2005):1302-1306, https://doi.org/10.1016/j.jpcs.2005.05.002 . .