Showing 3 results for Jaleh
Zahra Ahmadimanesh, Babak Jaleh, Mahtab Eslamipanah, Milad Daneshnazar, Hassan Hassan Sepehrmansourie, Mohammad Ali Zolfigol,
Volume 17, Issue 2 (Summer-Fall 2023)
Abstract
In this research, palladium nanoparticles (Pd NPs) were first synthesized using laser ablation in the deionized (DI) water environment. Also, metal-organic framework (MOF) was produced using the solvothermal method at a temperature of 150°C. To accumulate Pd NPs on the synthesized MOF, ultrasonic and magnetic stirring methods were used. Different analytical methods were used to investigate the structure and morphology of the synthesized nanocomposite. Also, the sensitivity of the synthesized nanocomposite to ethanol and methanol organic vapors was investigated. The results showed an increase in the response of the MOF in the presence of nanoparticles.
Arezou Joudaki, Babak Jaleh, Ensiye Shabanlou, Saeid Azizian,
Volume 17, Issue 2 (Summer-Fall 2023)
Abstract
In recent years, global climate change and population growth have exacerbated freshwater shortages. To address this issue, harvesting water from atmospheric fog has emerged as a promising technique. Inspired by natural processes, the fabrication of hybrid hydrophilic (HI) and superhydrophobic (SHB) surfaces has gained significant attention for enhancing water harvesting efficiency. This study presents a simple, cost-effective laser ablation method for creating wettability contrast surfaces with triangular and parallel patterns on brass metal. Through X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM), we investigated the structural and morphological effects on the wettability behavior of irradiated and non-irradiated brass. Additionally, we examined the influence of pattern shapes on water harvesting efficiency. Our findings indicate that triangular patterns significantly enhance water harvesting performance compared to parallel patterns.
Babak Jaleh, Amir Asgary,
Volume 18, Issue 1 (10-2024)
Abstract
A compact sensor utilizing off-axis integrated cavity output spectroscopy at a wavelength of 1.389 μm was developed to measure the δ¹⁸O and δ²H isotopic ratios in liquid water samples within the natural concentration range. Allan variance analysis indicated an optimal averaging time of approximately 21 s. The stability and long-term reproducibility of the laser system were assessed using 1-second averaging over 75 min. The minimum detectable absorption (MDA) was determined to be approximately 8.4 × 10⁻⁴ Hz⁻¹/² with a 17 s averaging time. To assess accuracy and reproducibility, the setup was tested within the natural concentration range (δ²H: -400 to 0‰ and δ¹⁸O: -54 to 0‰) using five standard samples, achieving an average accuracy and reproducibility of better than 2.5‰ for δ²H and 0.5‰ for δ¹⁸O.
