Properties of some azo-copolyimide thin films used in the formation of photoinduced surface relief gratings

Abstract

The patterning of the free standing azo-copolyimide films under different irradiation conditions led to the uniform surface relief gratings.

Evaluation of Local Mechanical and Chemical Properties via AFM as a Tool for Understanding the Formation Mechanism of Pulsed UV Laser-Nanoinduced Patterns on Azo-Naphthalene-Based Polyimide Films

“…The first method is the most used due to the better control of sequence chromophore distribution. The azobenzene-functionalized monomers can be the diamines or dianhydrides or both of them [ 3 , 12 , 13 , 14 , 15 , 16 ]. Many azodiamines have been obtained and used for the synthesis and characterization of the azopolyimides, usually containing substituted or unsubstituted azobenzene side chains.…”

The chromic and electrochemical response of CoCl2 − filled polyimide materials for sensing applications

“…Recently, high-tech industries required the development of new polyimide materials, such as micro-and nano-electronics, opto-electronics, aerospace and civil transportation, fuel cells, energy, automotive, etc. [30][31][32][33]. The polyimides display both mechanical strength and temperature resistance besides other properties, such as lightweight, high corrosion resistance, insulating properties, fluorescence ability, dimensional stability, low flammability, separation properties, biocompatibility, etc.…”

Development and Morphological Characterization of Novel Polyimide/Metal nano Hybrid Materials

“…In general, among other polymers, polyimides are useful in microelectronic applications because of their unique properties: thermal and chemical stability, high electrical resistivity, low dielectric constant, and good processibility [5]. Sava and his collaborators induced surface relief gratings on azo-polyimide and azo-copolyimide surfaces via laser irradiation through phase masks with different pitch [6][7][8], which were subsequently used as substrate for gold deposition by sputtering [8]. In this case, the application was metallic reflective gratings, gold being preferred due to its high optical performance [8].…”

“…International research on nanostructure phenomena followed until now the synthesis of materials capable of generating a controllable surface structure without making a direct link between the chemical structure of the polymer used and the nanostructure mechanism. To date, there are several theoretical models and mechanisms in the literature that try to explain the processes of reordering the surface of polymeric materials, based on two types of phenomena: the first group of theories involves a reorganization of the polymeric material and their compression under the UV radiation action, and the second group proceeds from the hypothesis of moving the polymeric material (photoinduction) [6][7][8]. In this context, the degree of novelty in this paper refers to the fact that the chemical structure of the polymer will essentially influence the type of mechanism through which the nanostructuring process is carried out.…”