14 مرداد 1399
ابراهيم محمدي منش

ابراهیم محمدی منش

مرتبه علمی: استادیار
نشانی: ملایر- کیلومتر 5 جاده اراک- پردیس دانشگاه ملایر- دانشکده علوم- گروه فیزیک
تحصیلات: دکترای تخصصی / فیزیک حالت جامد
تلفن: 081-32355404
دانشکده: علوم پایه

مشخصات پژوهش

عنوان
Simulation and experimental study of FET biosensor to detect polycyclic aromatic hydrocarbons
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Graphene, Biosensor, PAHs, DNA, DFT
سال
2019
مجله APPLIED SURFACE SCIENCE
پژوهشگران ابراهیم محمدی منش

چکیده

In this paper, the DNA/Cu2O-GS nanostructure was simulated to detect polycyclic aromatic hydrocarbons (PAHs) and compared with our experimental results. We use a simulation for calculations based on density functional theory (DFT). In the first step, DNA/Cu2O-GS nanostructure was simulated and adsorption mechanism, the density of states and charge transfer process were investigated in the presence and absence of PAHs using the QUANTUM ESPRESSO software and BoltzTrap computing code. The simulation results showed that Cu2O-GS nanostructure can be well used to adsorption and stabilization of DNA. Also the simulation results of electrical conductivity change showed that DNA/Cu2O-GS nanostructure can be well used as a field effect transistor (FET) to detect PAHs. On the other hand, the electric current changes of the DNA/Cu2O-GS-FET for three samples of PAHs (benzene, toluene, and naphthalene) were experimentally studies. Also current leakage, the sensitivity, and dynamic range of transistor for benzene, naphthalene and toluene experimentally were investigated. The experimental results show that the DNA/Cu2O-GS-FET can use as a biosensor for PAHs. Our simulation and experimental results are in good agreement and this DFT-based simulation idea can use for other biosensors.