A route to self-organized honeycomb microstructured polystyrene films and their chemical characterization by ToF-SIMS imaging
(2007) Advanced Functional Materials — Vol. 17, n° 7, p. 1079-1084 (2007)
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- Abstract
- A new type of polymer compound that allows the formation of highly ordered microstructured films by casting from a volatile solvent in the presence of humidity, and its characterization by ToF-SIMS (time-of-flight secondary-ion mass spectrometry) are presented. A honeycomb, structure is obtained by activation of 2,2,6,6-tetramethyl-1-piperidinyloxyl (TEMPO)-terminated polystyrene (PS) with p-toluenesulfonic acid (PTSA). The mechanism of this activation reaction, leading to a more polar PS termination, is deduced from simple experiments and supported by ToF-SIMS characterization. Positive and negative ToF-SIMS imaging allows different chemical regions correlating to the film morphology to be distinguished. This new, straightforward activation process, together with ToF-SIMS chemical imaging, provides a better understanding of the phenomena underlying the formation of these films by directly linking the role of polar terminations to the microscale self-organization. This new method, transposable to other organic acids, suggests interesting new perspectives in the field of self-organized chemical and topographical patterning.
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Yunus, S., Delcorte, A., Poleunis, C., Bertrand, P., Bolognesi, A., & Botta, C. (2007). A route to self-organized honeycomb microstructured polystyrene films and their chemical characterization by ToF-SIMS imaging. Advanced Functional Materials, 17(7), 1079-1084. https://doi.org/10.1002/adfm.200600470 (Original work published 2007)