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Papers by motahareh raziyan

Research paper thumbnail of Review—Electrochemical Biosensors for Alpha-Fetoprotein Detection: Recent Advances and Future Perspectives

Journal of the Electrochemical Society, Jun 14, 2024

Research paper thumbnail of Enhancing Sensitivity in Piezoelectric Micro Cantilever Designs Using Stress Concentration Regions for Label Free Detection

Engineering Mechanics ..., May 16, 2024

The focus of this research project is to enhance cantilever beam designs for biosensing applicati... more The focus of this research project is to enhance cantilever beam designs for biosensing applications by including Stress Concentration Regions (SCRs). The stress distribution across several cantilever beam designs was determined by simulating them using COMSOL Multiphysics. The earliest designs were developed utilizing Polyvinylidene fluoride (PVDF) to showcase improved sensitivity for mechanical detection without the need for labels in biosensor applications. The analysis of cantilever beams involves the examination of their eigenfrequency and stationary behavior in the context of piezoelectric effect physics. An analysis is conducted on several cantilever beam structures to determine the most appropriate one. In this analysis, the various beams are exposed to an identical mechanical force, and their respective displacements, potential voltage, von Mises stress, and eigenfrequencies are examined.

Research paper thumbnail of Development and Evaluation of 3D-Printed PLA/PHA/PHB/HA Composite Scaffolds for Enhanced Tissue-Engineering Applications

Journal of composites science, Jun 16, 2024

Research paper thumbnail of Effects of 5 wt.% Polycaprolactone, Polyhydroxybutyrate and Polyvinyltrimethoxysilane on the Properties of Ag/Zn/Mg Alloy

Materials

Mg-based alloys have several suitable properties for biomaterials, but they have major problems o... more Mg-based alloys have several suitable properties for biomaterials, but they have major problems of being less antibacterial and have a low mechanical strength. To solve these problems, a new combination of Ag/Zn/Mg was prepared in this study, where the presence of Zn and Ag can help to increase the bioactivity. The use of 5 wt.% polymers consisting of PolyCaproLactone (PCL), PolyHydroxyButyrate (PHB) and PolyVinylTriMethoxySilane (PVTMS) is also investigated. DSC, XRD, TEM, FTIR, SEM, and EDAX analysis, as well as mechanical and bioactive behavior, were investigated to characterize the prepared composites. In the comparison, the best behavior was found when PHB was used. The results show that the strength values ranged from ~201 to 261 MPa.

Research paper thumbnail of Review—Electrochemical Biosensors for Alpha-Fetoprotein Detection: Recent Advances and Future Perspectives

Journal of the Electrochemical Society, Jun 14, 2024

Research paper thumbnail of Enhancing Sensitivity in Piezoelectric Micro Cantilever Designs Using Stress Concentration Regions for Label Free Detection

Engineering Mechanics ..., May 16, 2024

The focus of this research project is to enhance cantilever beam designs for biosensing applicati... more The focus of this research project is to enhance cantilever beam designs for biosensing applications by including Stress Concentration Regions (SCRs). The stress distribution across several cantilever beam designs was determined by simulating them using COMSOL Multiphysics. The earliest designs were developed utilizing Polyvinylidene fluoride (PVDF) to showcase improved sensitivity for mechanical detection without the need for labels in biosensor applications. The analysis of cantilever beams involves the examination of their eigenfrequency and stationary behavior in the context of piezoelectric effect physics. An analysis is conducted on several cantilever beam structures to determine the most appropriate one. In this analysis, the various beams are exposed to an identical mechanical force, and their respective displacements, potential voltage, von Mises stress, and eigenfrequencies are examined.

Research paper thumbnail of Development and Evaluation of 3D-Printed PLA/PHA/PHB/HA Composite Scaffolds for Enhanced Tissue-Engineering Applications

Journal of composites science, Jun 16, 2024

Research paper thumbnail of Effects of 5 wt.% Polycaprolactone, Polyhydroxybutyrate and Polyvinyltrimethoxysilane on the Properties of Ag/Zn/Mg Alloy

Materials

Mg-based alloys have several suitable properties for biomaterials, but they have major problems o... more Mg-based alloys have several suitable properties for biomaterials, but they have major problems of being less antibacterial and have a low mechanical strength. To solve these problems, a new combination of Ag/Zn/Mg was prepared in this study, where the presence of Zn and Ag can help to increase the bioactivity. The use of 5 wt.% polymers consisting of PolyCaproLactone (PCL), PolyHydroxyButyrate (PHB) and PolyVinylTriMethoxySilane (PVTMS) is also investigated. DSC, XRD, TEM, FTIR, SEM, and EDAX analysis, as well as mechanical and bioactive behavior, were investigated to characterize the prepared composites. In the comparison, the best behavior was found when PHB was used. The results show that the strength values ranged from ~201 to 261 MPa.

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