Delving into the Latest Updates on University of Azad Jammu and Kashmir with Synapse

Vanadium oxide (VO_x) has demonstrated significant potential in various applications, including sensors (included but not limited to photodetection), smart windows, and energy storage devices, attributed to its pronounced semiconductor-to-metal transition near 340 K, coupled with a structural transition.However, the requirement for high-temperature synthesis to achieve the desired phases for these applications has limited its broader utilization, particularly in contexts where high temperatures are impractical.Here, we examined the effect of thermal annealing on the structural, electronic, and photodetection properties of VO_x/p-Si heterojunctions fabricated via dip coating.VO_x films were categorized into three types: pristine (VO_x-1), annealed at 300 °C (VO_x-2), and 500 °C (VO_x-3).X-ray diffraction anal. confirmed hydrated V₂O₅ in VO_1-x and VO_x-2, while VO_x-3 was pure and crystalline V₂O₅.Significantly, the band gap narrowed from 2.75 eV in VO_x-1 to 2.46 eV in VO_x-3, a result attributed to grain growth and the consequential attenuation of quantum confinement effects.The DFT calculations implemented through the VASP code supported these findings, revealing an annealing-induced increase in the work function, revealing enhanced surface electronic properties favorable to photodetection.The elec. properties of the PN heterojunction Ag/n-VO_x/p-Si/Ag with Ag/n-VO_x terminal grounded showed a transition from ohmic-like in VO_x-1 to rectifying behavior for VO_x-2 and VO_x-3 with dark condition reverse bias current larger than the forward bias current, showing typical Schottky junction type contact between p-Si and n-VO_x.This behavior highlights the role of annealing in modulating the interface properties between p-Si and n-VO_x.Notably, the heterojunctions demonstrated superior photodetection across IR, red, green, blue, and UV spectra, with performance metrics like responsivity and sensitivity markedly improved post-annealing, attributed to increased crystallinity and reduced interface traps and work function tuning.Addnl., the devices exhibited rapid transient responses under periodic LED illumination, highlighting their potential for advanced photodetection applications.

2024-10-01·Journal of Vibration and Control

Vibration of protein microtubules within the elastic medium along with electromagnetic and gravitational forces by using orthotropic elastic shell model

作者: Iqbal, Muhammad Asad ; Taj, Muhammad ; Safeer, Muhammad

In the present study, author analyses the vibration of protein microtubules and its interaction with the surrounding elastic medium and electromagnetic and gravitational forces. Protein microtubules are dynamic Nano fibers found inside the cell’s cytoplasm, strengthening the cytoskeleton and gives shape to the cell. When the cell undergoes deformation microtubules vibrate. Understanding the vibration of these Nano fibers within the elastic medium and along with the body forces as electromagnetic and gravitational forces is crucial. The main purpose of this study is to explore the effects of surrounding elastic medium and electromagnetic and gravitational forces on the vibration of protein microtubules. The findings reveal that the effects of surrounding medium and the external influences on the vibration of these Nano fibers are significant. The study presents the numerical values in the form of table associated with microtubules in various conditions: free, embedded, and in the presence of electromagnetic and gravitational forces.

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