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Imaging dielectric relaxation in nanostructured polymers by frequency modulation electrostatic force microscopy

Riedel, Clément and Sweeney, Ryan and Israeloff, Nathan E. and Arinero, Richard and Schwartz, Gustavo Ariel and Alegría, Angel and Tordjeman, Philippe and Colmenero, Juan Imaging dielectric relaxation in nanostructured polymers by frequency modulation electrostatic force microscopy. (2010) Applied Physics Letters, 96 (21). ISSN 0003-6951

(Document in English)

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Official URL: http://dx.doi.org/10.1063/1.3431288


We have developed a method for imaging the temperature-frequency dependence of the dynamics of nanostructured polymer films with spatial resolution. This method provides images with dielectric compositional contrast well decoupled from topography. Using frequency-modulation electrostatic-force-microscopy, we probe the local frequency-dependent (0.1–100 Hz) dielectric response through measurement of the amplitude and phase of the force gradient in response to an oscillating applied electric field. When the phase is imaged at fixed frequency, it reveals the spatial variation in dielectric losses, i.e., the spatial variation in molecular/dipolar dynamics, with 40 nm lateral resolution. This is demonstrated by using as a model system; a phase separated polystyrene/polyvinyl-acetate (PVAc) blend. We show that nanoscale dynamic domains of PVAc are clearly identifiable in phase images as those which light-up in a band of temperature, reflecting the variations in the molecular/dipolar dynamics approaching the glass transition temperature of PVAc.

Item Type:Article
Additional Information:Thanks to American Institute of Physics editor. The original PDF of the article can be found at Applied Physics Letters website : http://scitation.aip.org/content/aip/journal/apl
HAL Id:hal-00909650
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Universidad del País Vasco - Euskal Herriko Unibertsitatea - EHU (SPAIN)
Other partners > Université de Montpellier 2 (FRANCE)
Other partners > Northeastern University (USA)
Laboratory name:
Deposited On:26 Nov 2013 14:59

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