فصلنامه دنیای نانو
پیاپی 63 (تابستان 1400)

Tissue engineering, by combining different fields such as physics, nanotechnology, molecular biology and evolution, on the one hand, tries to provide a more complete and better understanding of cellular processes, and on the other hand, to improve engineering methods and tissue production. Alternatives for medical use. Nanotechnology, meanwhile, has led to significant advances in the development of new materials for use in the biomedical field. Nanomaterials with the aim of facilitating the creation of tissue engineering structures have the ability to be designed to create the least inflammatory response in the host body. Therefore, knowledge of the impact of these properties on cell behavior is essential, both in early cell research and in application-related areas, such as tissue engineering and cell-based technologies. Biomaterials with a high surface-to-volume ratio contribute significantly to the adsorption capacity and chemical activity, which ultimately leads to increased cellular function. Also, biological nanomaterials, compared to conventional conventional biomaterials, have a high potential for loading drugs and nucleic acids or other biological factors to accelerate tissue repair and regeneration. This paper reviews the applications of biomaterials in tissue engineering and regenerative medicine and discusses the role of these materials as additives in tissue engineering scaffolds as well as induction factors in the culture medium.

Tissue engineering, by combining different fields such as physics, nanotechnology, molecular biology and evolution, on the one hand, tries to provide a more complete and better understanding of cellular processes, and on the other hand, to improve engineering methods and tissue production. Alternatives for medical use. Nanotechnology, meanwhile, has led to significant advances in the development of new materials for use in the biomedical field. Nanomaterials with the aim of facilitating the creation of tissue engineering structures have the ability to be designed to create the least inflammatory response in the host body. Therefore, knowledge of the impact of these properties on cell behavior is essential, both in early cell research and in application-related areas, such as tissue engineering and cell-based technologies. Biomaterials with a high surface-to-volume ratio contribute significantly to the adsorption capacity and chemical activity, which ultimately leads to increased cellular function. Also, biological nanomaterials, compared to conventional conventional biomaterials, have a high potential for loading drugs and nucleic acids or other biological factors to accelerate tissue repair and regeneration. This paper reviews the applications of biomaterials in tissue engineering and regenerative medicine and discusses the role of these materials as additives in tissue engineering scaffolds as well as induction factors in the culture medium.

Graphene is one of the allotropes of carbon that the carbon atoms are stacked two-dimensionally as thick as a carbon atom with sp2 hybridization. Each carbon atom is attached to three neighboring carbon atoms by the σ bond, which is a strong covalent bond, and they have created a hexagonal structure. In fact, graphene is the basic structure of most carbon allotropes such as fullerene, carbon nanotubes and graphite. Graphene has received a lot of attention in recent years due to its unique electrical, mechanical, optical and etc. properties. Finding a suitable, efficient, cheap and highefficiency synthesis method is one of the most important challenges of studies in the field of this material. In this study, graphene was synthesized by electrochemical exfoliation in several different electrolytes and by using Raman spectroscopy, visible-ultraviolet, and Fourier transform infrared, quality of synthesized graphene has been investigated. The layered structure and folds of graphene are also shown by FESEM and TEM imaging.

In the present study, barium hexaferrite doped with copper, bismuth and titanium ( ) was synthesized using the co-precipitation method and then their structural and optical properties were investigated. XRD and FTIR analyzes were used to investigate the structural properties of the samples, based on which, the formation of the dominant phase of barium hexaferrite with space group of P63 / mmc was confirmed. The lattice parameters and the size of the nanocrystals were also calculated for the synthesized samples. Field Emission Scanning Electron Microscopy (FESEM) analysis was also used to examine the morphology of the synthesized samples. DRS analysis was also used to investigate the optical properties and determine the energy band gap of the samples. The energy band gap values for samples with x equal to 0.1,0.2 and 0.3 were obtained about 1.43, 1.66 and 1.85 eV, respectively.

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