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Fabrication of High–Quality Croconic Acid Thin Films

Undergraduate #81
Discipline: Physics
Subcategory: Materials Science

Erika Sanchez - California State University San Bernardino
Co-Author(s): Taylor Dixon, California State University San Bernardino; Francisco Guzman, California State University San Bernardino



Ferroelectric materials have demonstrated diverse technological applications, with thin films of particular interest. Croconic Acid, an organic ferroelectric, is promising due to its economic, scalable production and large ferroelectric polarization. The films are prepared in a thermal deposition chamber under an ultrahigh vacuum system at a pressure of at least 1×10^-7 Torr. The bulk material is heated at about 130°C to 140°C. During the deposition, electric field guidance is utilized in order to promote the alignment of Croconic Acid molecules as they make their way to an ultra-flat substrate. Here we present results on room temperature growth of Croconic Acid thin films using two different methods to create an electric field in order to achieve a high quality smooth surface film. One method was using a mesh screen and the other was using a metal washer in order to create an electric field, each of an equal strength of 2kV. Atomic force microscopy was used to assess film thickness and surface structure and roughness.

Funder Acknowledgement(s): CREST , NSF

Faculty Advisor: Sara Callori, sara.callori@csusb.edu

Role: I prepared the thin films and characterized their surface roughness using the AFM.

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This material is based upon work supported by the National Science Foundation (NSF) under Grant No. DUE-1930047. Any opinions, findings, interpretations, conclusions or recommendations expressed in this material are those of its authors and do not represent the views of the AAAS Board of Directors, the Council of AAAS, AAAS’ membership or the National Science Foundation.

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