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Broadband nanodielectric spectroscopy by means of amplitude modulation electrostatic force microscopy (AM-EFM)

Schwartz, Gustavo Ariel and Riedel, Clément and Arinero, Richard and Tordjeman, Philippe and Alegría, Angel and Colmenero, Juan Broadband nanodielectric spectroscopy by means of amplitude modulation electrostatic force microscopy (AM-EFM). (2011) Ultramicroscopy, 111 (8). 1366-1369. ISSN 0304-3991

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.ultramic.2011.05.001


In this work we present a new AFM based approach to measure the local dielectric response of polymer films at the nanoscale by means of Amplitude Modulation Electrostatic Force Microscopy (AM-EFM). The proposed experimental method is based on the measurement of the tip–sample force via the detection of the second harmonic component of the photosensor signal by means of a lock-in amplifier. This approach allows reaching unprecedented broad frequency range (2–3×104 Hz) without restrictions on the sample environment. The method was tested on different poly(vinyl acetate) (PVAc) films at several temperatures. Simple analytical models for describing the electric tip–sample interaction semi-quantitatively account for the dependence of the measured local dielectric response on samples with different thicknesses and at several tip–sample distances.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Ultramicroscopy website : http://dx.doi.org/10.1016/j.ultramic.2011.05.001
HAL Id:hal-00933984
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Donostia International Physics Center - DIPC (SPAIN)
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)
Laboratory name:
Deposited On:03 Dec 2013 09:47

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