Formation of ArF laser-induced self-assembled macrostructures on poly methyl methacrylate and CR-39 polymers

Refahizadeh, Mitra; Parvin, Parviz; Silakhori, K.; Mortazavi, Seyedeh Zahra; Reyhani, A.; Abolhosseini, Sh.; Rad, H. Hojati; Majdabadi, Abbas

doi:10.2351/1.4980163

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…ArF excimer laser at 193nm bene ts the following properties, i.e. 15 nsec duration and spatial distribution of ∼1 cm × 1 cm with transverse and vertical divergence of 1 and 3 mrad in orthogonal directions respectively [38][39][40][41] . Fig.…”

Section: Methodsmentioning

confidence: 99%

PC12 transformation to neuron cells activated by low-level laser at 660 nm on the UV pre-treated CR-39 scaffolds with parallel microchannels

Hashamdar,

Parvin,

Jafargholi

et al. 2023

Preprint

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A rapid method of neuron regeneration is introduced on a novel synthetic scaffold. Initially, poly allyldiglycol carbonate (CR-39) substrate is textured under high dose of ArF UV excimer laser (1000 shot, 300 mJ/pulse at 193 nm) to create superficial periodic parallel microchannels with micrometer spacing and sub-micron width. Ultra violet treated CR-39 (UT CR-39) provides a suitable scaffold to speed up the transformation/differentiation of PC12 cells. The latter is pheochromocytoma from the rat adrenal medulla as an embryonic origin from the neural crest usually exposed to the nerve growth factor (NGF). In fact, PC12 cells are seeded on the microchannels and simultaneously stimulated by coherent red photons at 660 nm within the therapeutic window. The parallel microchannels improve oxygen and water diffusion in the scaffold providing better condition for the cell culture alongside the axon alignment to support the nerve outgrowth. The surface cross-linking due to UV exposure and subsequent induced hydrophilicity notably contribute in the neuron cell regeneration without adding NGF. The cell activation due to the coherent photons give rise to enhance the regeneration process too. Here, we have shown that PC12 cells are efficiently transformed to nerves according to Immunocytochemistry (ICC) and Western Blot verification tests based on MAP2 and Synapsin1 protein antibodies. In general, UT CR-39 acts as a superior ridged bed to elevate the population of neural cells more than three times against those of untreated (control ones). Furthermore, the UT CR-39 scaffold undergoes extra improvement of ~ 30% after 12 minutes laser activation regarding the photo biomodulation (PBM) mechanism.

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Section: Methodsmentioning

confidence: 99%

PC12 transformation to neuron cells activated by low-level laser at 660 nm on the UV pre-treated CR-39 scaffolds with parallel microchannels

Hashamdar,

Parvin,

Jafargholi

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The reflection of the microstructures is obtained using method C. Moreover, the creation of regular microstructures by the ArF excimer laser on the polymer surface of the solar cell attests to a decrease in spectral reflection alongside the flattening of the spectral reflection. This causes to enhance the efficiency of the solar cell by ~1% [15][16][17][18][19]. Moreover, the ZnO nanowires contribute to enhancing solar cell efficiencies due to UV-blue spectral downshifting [20,21].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Surface Texturing of Silicon with Surface Regular Microstructure Using C Method

et al. 2022

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Silicon, as the most abundant element in the earth’s crust and the most common material used in electronic and optical equipment, has attracted the attention of many individuals to change the properties of this material, improving its electronic and optical properties. One of these efforts relies on the reduction of surface reflection by making use of different methods. However, among them, the use of lasers in creating surface microstructures has been of special importance because there is no need for masks and other additional materials. In this work, a theoretical method is utilized to analyze these textures with the theorem of diffraction grating on a micrometer scale. The surface reflection of the microstructure created by excimer laser exposure on a silicon surface is simulated. The theoretical Coordinate transformation method (C method) gives out notable results against the experimental records by approximating triangular and trapezoidal microstructures. The model is useful for predicting the reflective response of the modified microstructural morphology. One of the main applications is the texturing of the solar cell front faces to enhance their efficiency, mainly due to photon trapping.

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Micro texturing and laser irradiation, two stimulus of growth and differentiation to neural like cell on the PMMA polymer

Hashamdar,

Parvin,

Mayahi

et al. 2023

International Journal of Polymeric Materials and Polymeric Biom

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Formation of ArF laser-induced self-assembled macrostructures on poly methyl methacrylate and CR-39 polymers

Cited by 4 publications

References 35 publications

PC12 transformation to neuron cells activated by low-level laser at 660 nm on the UV pre-treated CR-39 scaffolds with parallel microchannels

PC12 transformation to neuron cells activated by low-level laser at 660 nm on the UV pre-treated CR-39 scaffolds with parallel microchannels

Analysis of Surface Texturing of Silicon with Surface Regular Microstructure Using C Method

Micro texturing and laser irradiation, two stimulus of growth and differentiation to neural like cell on the PMMA polymer

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