Application of ionic liquids in scanning electron microscopy studies of dielectric microstructure

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Abstract

This article presents the results of studying non-conducting biological, crystalline objects, powders, and glass composite samples using an ionic liquid by scanning electron microscopy. Ionic liquids based on alkylpyridinium dicyanamides studied in the work were obtained by a metathesis reaction. A solution of ionic liquid in acetone was used as a conductive coating for dielectrics. It was found that the use of ionic liquid is an alternative to the methods of metal and carbon sputtering on dielectric samples. Scanning electron microscopy images of samples obtained by such microscopy methods as low vacuum mode, the use of metal sputtering ( Pt ) on samples, and a study of samples without a conductive coating are presented. A comparative analysis of the results obtained by traditional methods and the method of applying ionic liquid to samples is carried out. It is shown that the use of electrically conductive ionic liquids with the thermal and chemical stability makes it possible to obtain high-resolution electron microscopic images and also allows visualization of the topographic and compositional contrast of the studied dielectric samples.

About the authors

Alexandra I. Ivanova

Tver State University

Email: ivanova.ai@tversu.ru
Ph. D., Docent, Applied Physic Department

Aleksandra V. Dudilovskaya

Tver State University

4th year student, Physical-Technical Faculty

Oleg E. Zhuravlev

Tver State University

Ph. D., Docent Organic Chemistry Department

Arseniy D. Kaftanov

Tver State University

4th year postgraduate student, Chemical-Technological Faculty

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