Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/1925
Title: Dimensions of polystyrene particles deposited on mica from dilute cyclohexane solution at different temperatures
Authors: Demir, Mustafa Muammer
Erman, Burak
Keywords: Atomic force microscopy
Polystyrenes
Deposition
Evaporation
Mica
Publisher: American Chemical Society
Source: Demir, M.M., and Erman, B. (2002). Dimensions of polystyrene particles deposited on mica from dilute cyclohexane solution at different temperatures. Macromolecules, 35(21), 7986-7992. doi:10.1021/ma020676+
Abstract: Using atomic force microscopy, the height, diameter, and volume of polystyrene particles deposited on mica from dilute cyclohexane solution at different temperatures are determined. Dimensions exhibit a strong temperature dependence. The heights of the deposited particles are only a few atomic diameters, the major dimension being parallel to the mica surface. The number of single polystyrene molecules in a deposited particle cannot be determined directly by atomic force microscopy. However, the maximum number of molecules that may be present in a particle may be estimated. Below 35 °C, the particles possibly consist of single collapsed molecules. This number increases with temperature and becomes as large as about 30 molecules per particle at 80 °C. The volume occupied by a single chain in solvent is calculated as a function of temperature and compared with observed volumes of dry particles on mica. A linear relationship is observed between single chain volumes in solvent and corresponding particle volumes on mica. On the average, the volume of a single chain in solution is 10 times the volume of a dry particle at the corresponding temperature. Fluctuations of chain volumes that are dominant in solution are also present in the volumes of particles deposited and dried on mica.
URI: http://doi.org/10.1021/ma020676+
http://hdl.handle.net/11147/1925
ISSN: 0024-9297
0024-9297
1520-5835
Appears in Collections:Chemistry / Kimya
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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