فاطمه سادات عابدحيدري

A new development has emerged in the field of graphene synthesis by direct laser writing (LIG), which is very economical and acceptable, unlike the previous methods. In this thesis, a piezoresistive strain sensor is made by raising the position on LIG. First, the graphene structure was formed by CO2 laser on polymer substrates and by transferring to a polydimethyl siloxane (PDMS) polymer substrate, a flexible nanocomposite strain sensing element was obtained. The formation of hierarchical and porous structure of graphene foam was investigated by SEM, EDS and Raman characterization tests. In order to improve the efficiency of the sensor, a hybrid structure with graphene has been made by sputtering silver. Finally, the electromechanical performance of both sensors in strain (0.1-70%) in different number of cycles was eva‎luated and analyzed and it was proved that adding silver nanoparticles to the graphene structure, on average, increases the sensor by 101.5%, but causes it to Graphene structure is transformed. In the linear behavior of the sensor.

حسگر كرنش پيزومقاومتي , گرافن القا شده با ليزر , الكترونيك منعطف , نانو كامپوزيت , نانو ذرات نقره

piezoresistive strain sensor , laser-induced graphene , Flexible Electronics , nanocomposite , AgNps

Fateme Abed Heidari

Dr. Sadegh Sadeghzade