Molybdenum disulfide nanostructures (NSs) are created using a thermal chemical vapor deposition method (TCVD). These NSs then decorated with Au to form Au/MoS2 nano heterojunctions (NHs) Physical method. The goal is create high-performance photodetectors. To study the as-prepared structures, X-ray diffraction, Raman, and UV-Visible spectroscopy applied analyze structural optical properties. photodetectors' responsivity (R), detectivity (D), external quantum efficiency (EQE) stability tested...

Nowadays, the use of nanostructures in various medical and biological fields such as drug delivery cancer treatment is increasing. Among nanostructures, graphene oxide (GO) an excellent candidate for application because its unique properties. For more stability, GO can bind with polymers by carboxyl, hydroxyl epoxy functional groups. In this study, firstly synthesized improved Hummers chemical method then polyethylene glycol polymer was conjugated to it using EDC/NHS catalyst. Finally,...

A key component of the transition metal dichalcogenides (TMDCs) family, tungsten disulfide (WS2) offers exceptional optoelectronic characteristics and significant promise for high-sensitivity photodetection. This study utilized chemical vapor deposition (CVD) to grow WS2 nanoflakes on a SiO2/Si substrate. The WS2/SiO2/Si substrate was then coated with thin layer gold (Au) create Au/WS2 nanosheets. resultant samples' crystalline structure optical properties were investigated using Raman,...

We theoretically propose a graphene-based adiabatic quantum pump with intrinsic spin-orbit coupling (SOC) subject to strain where two time-dependent extrinsic coupled barriers drive spin and charge currents. study three differing operation modes i) location, ii) chemical potential, iii) SOC of the oscillate periodically out phase around their equilibrium states. Our results demonstrate that amplitude adiabatically pumped currents highly depends on considered mode. find such device operates...

Nowadays, nanostructures have been given significant attention in medical and biological fields. Among these nanostructures, graphene oxide (GO) has widely used drug delivery systems, because of its unique properties, the ability to connect other such as magnetic nanoparticles (NPs) well polymers by functional groups. In this research, first, GO was prepared exfoliating graphite according modified Hummer’s method, then Fe 3 O 4 NPs were synthesized a simple co‐precipitation method on...

We study the effect of interfacial transparency on Josephson current in a diffusive ferromagnetic contact between two superconductors. In contrast to cases fully transparent and low-transparency interfaces, current-phase relation is shown be nonsinusoidal for finite transparency. It demonstrated that even nearly interfaces small corrections due weak disorders contribute second-harmonic component relation. For certain thicknesses exchange field this can lead tiny minimum supercurrent at...

Abstract The performance of surface plasmon resonance (SPR) sensors can be different depending on which characteristic the SPR sensor amplitude or phase is monitored. sensitivity strongly depends geometry and optical properties system. existence sharp changes in spectrum variations found as thickness SPR-supporting gold ( d g ) varies around a critical c ). In addition, simulation results indicate that divided into two regions so S φ for region <mml:math...

We study the Josephson current through a ballistic normal metal layer of thickness $D$, on which two superconducting electrodes are deposited within distance $L$ each other. In presence an (in-layer) magnetic field, we find that oscillations critical ${I}_{c}(\ensuremath{\Phi})$ with flux $\ensuremath{\Phi}$ significantly different from ordinary interference pattern. Depending ratio $L∕D$ and temperature, can have period smaller than quantum ${\ensuremath{\Phi}}_{0}$, nonzero minima, damping...

We investigate a graphene quantum pump, adiabatically driven by two thin potential barriers vibrating around their equilibrium positions. For the highly doped leads, pumped current per mode diverges at Dirac point due to more efficient contribution of evanescent modes in pumping process. The shows an oscillatory behavior with increasing amplitude as function carrier concentration. This effect is contrast decreasing similar normal pump (i.e. based on two-dimensional electron gas). operates...

A new approach using the full width by autocorrelation method (FWAM) is presented to estimate real of a &#13; surface plasmon resonance (SPR) biosensor‎ ‎spectrum‎. ‎The novelty statistical analysis expansion an arbitrary angular distribution in terms Gaussian functions and use parameters‎ ‎inside FWAM‎. ‎A formalism for sensitivity which amplification strategy FWAM appeared at evaluation sensitivity‎. ‎&#13; It found that‎ ‎the causes spectrum be between two limit values calculated from...

Abstract In this work, first, copper oxide nanoparticles (CUO NPs) were synthesized by physical methods and then coated with the bovine serum albumin (BSA) via biologically meditated minerals to form CUO@BSA NPs. Finally, curcumin (CUR) as an anticancer drug immobilized on surface of NPS. The properties CUO@BSA-CUR NPS investigated FTIR, UV-Vis, TEM, AFM spectroscopes. It was found that spherical a particle size 20 30 nm have sustained release CUR at 37°C in buffer solution. Also, result...

Non-synonymous single nucleotide polymorphisms (nsSNPs) are substitution occurring in the coding region of a gene and leads to change amino-acid sequence protein. The studies have shown these variations may be associated with disease. Thus, investigating effects nsSNPs on protein function will give greater insight how can lead into Breast cancer is most common among women causing highest death every year. BRCA1 BRCA2 tumor suppressor genes two main candidates which, mutations them increase...

Abstract The amplitude and phase sensitivities of a sensor with multiple nanolayers consisting gold-silicon dioxide-gold (Au-SiO 2 -Au) are investigated. proposed has the ability to limit certain regions sensing medium refractive index n s . number these can be increased by increasing thickness silicon dioxide layer ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi mathvariant="normal">d</mml:mi> </mml:mrow> <mml:mi>SiO</mml:mi>...

We investigate a graphene quantum pump, adiabatically driven by two thin potential barriers vibrating around their equilibrium positions. For the highly doped leads, pumped current per mode diverges at Dirac point due to more efficient contribution of evanescent modes in pumping process. The shows an oscillatory behavior with increasing amplitude as function carrier concentration. This effect is contrast decreasing similar normal pump. pump operates than oscillating barriers.