Место издания:Institute of Atmospheric Optics SB RAS Institute of Atmospheric Optics SB RAS, Tomsk, Russia
Первая страница:72
Последняя страница:72
Номер статьи:H-7
Аннотация:The synthesis of nanocarbon porous electrically conductive film structures by laser pyrolysis of polyimide film surface in air has found widespread application in the development and creation of microsupercapacitors, a variety of flexible electronics devices for everyday wear, and a wide range of detectors and sensors for multiple purposes. In the relevant literature, this material is referred to as "laser-induced graphene" (LIG). This report presents the findings of an investigation into the synthesis of LIG by means of pyrolysis of polyimide film surfaces using radiation from commercial pulsed-periodic diode lasers operating at a wavelength of 450 nm. The synthesis was conducted in both line-by-line and raster modes. The output power of the laser heads was regulated by pulse-width modulation. The temporal profile of the heads' radiation has been observed to vary according to the level of conditional power (expressed in percentage). As demonstrated in the research, at an average laser power of more than 0.12 W, depending on the treatment mode (line-by-line or raster), it is possible to synthesize LIG with different thickness, structure and water wettability. It has been established that LIG synthesized in raster mode is more heterogeneous in thickness and structure than that obtained in line-by-line mode. It has been demonstrated that in order to execute a valid comparison of the parameters of LIG obtained using different diode lasers, it is imperative to control the radiation parameters using calibrated measurement tools. The research was performed under the auspices of a state assignment (state reg. N 1022040600237-3-1.3.2) of the Ministry of Science and Higher Education of the Russian Federation, utilizing the equipment of Core shared research facilities "Center of physical and physical-chemical methods of analysis, investigations of properties and characteristics surface, nanostructures, materials and samples" of UdmFRC UB RAS.
