Amirali Khalili’s Post

I am pleased to share that our latest paper "AC electrothermal trapping for efficient nanoparticles enrichment in a microchannel" has been published in the "International Journal of Thermofluids" and is now accessible online. https://lnkd.in/gkQTTgsg #nanoparticles #microfluidics

Heartiest congratulations to Ms. P Priscilla and other coauthors for publishing article entitled " Effect of doping with carbon dots on the alignment and dielectric properties of nematic liquid crystal 4-cyano-4'-pentylbiphenyl in ITO sample cells without conventional alignment layers for low-cost display applications" in the Journal of Molecular Structure. It is available at https://lnkd.in/gkAr4u8S

#Article Surface Plasmon Resonance Sensitivity Enhancement Based on Protonated Polyaniline Films Doped by Aluminum Nitrate by Qais Al Bataineh, Victoria Shpacovitch, Diyar Sadiq, Ahmad Telfah and Roland Hergenröder https://lnkd.in/gFwK9aQU   #MDPI #Plasmon #Biochemical #SPR #biosensors #sensors #openaccess   #Abstract Complex composite films based on polyaniline (PANI) doped hydrochloric acid (HCl) incorporated with aluminum nitrate (Al(NO3)3) on Au-layer were designed and synthesized as a surface plasmon resonance (SPR) sensing device. The physicochemical properties of (PANI-HCl)/Al(NO3)3 complex composite films were studied for various Al(NO3)3 concentrations (0, 2, 4, 8, 16, and 32 wt.%). The refractive index of the (PANI-HCl)/Al(NO3)3 complex composite films increased continuously as Al(NO3)3 concentrations increased. The electrical conductivity values increased from 5.10 µS/cm to 10.00 µS/cm as Al(NO3)3 concentration increased to 32 wt.%. The sensitivity of the SPR sensing device was investigated using a theoretical approach and experimental measurements. The theoretical system of SPR measurement confirmed that increasing Al(NO3)3 in (PANI-HCl)/Al(NO3)3 complex composite films enhanced the sensitivity from about 114.5 [Deg/RIU] for Au-layer to 159.0 [Deg/RIU] for Au-((PANI-HCl)/Al(NO3)3 (32 wt.%)). In addition, the signal-to-noise ratio for Au-layer was 3.95, which increased after coating by (PANI-HCl)/Al(NO3)3 (32 wt.%) complex composite layer to 8.82. Finally, we conclude that coating Au-layer by (PANI-HCl)/Al(NO3)3 complex composite films enhances the sensitivity of the SPR sensing device.

Find our recent work published on "Optoelectronic and Photocatalytic investigations of chitosan (CS) modified Platinum decorated ceria (Pt-CeO2-CS) composite" Herein, a comparative study is performed to evaluate the Photodegradation of Methyl Orange (MO) and Photoelectrochemical (PEC) activities of novel ternary Pt–CeO2/Chitosan (Pt–CeO2/CS), and binary Pt/Chitosan (Pt/CS) and CeO2/Chitosan (CeO2/CS) composites synthesized via the chemical reduction and sol-gel methods. The structural, thermal, morphological, and optical characteristics of composite were examined using Fourier Transform Infra-Red (FTIR) Spectroscopy, Thermogravimetry (TG), Field Emission Scanning Electron Microscopy (FESEM) coupled with Electron Diffraction Spectroscopy (EDS), X-ray Diffraction (XRD), X-ray Photoelectron (XPS), UV–visible (UV–Vis), photoluminescence (PL) and Raman Spectroscopy. The UV–vis band gap analysis revealed that the reduction in the bandgap value Eg value (2.7eV) increases the light absorption property. The as synthesized ternary Pt–CeO2/CS composite acts as a photocatalyst for dye decolourisation, with a maximum of 84 % of methyl orange (MO) decolourisation at λmax of 464 nm under light irradiation. The kinetics of ternary composite was found to follow pseudo-first-order with rate constant of 0.01279 min−1. Moreover, the photoelectrochemical performance of Pt–CeO2/CS hybrid composite with 1.3 ∼ 2.5-fold higher value of current density (1.8 mA/cm2 at 0.67 V vs. Ag/AgCl) is attained as compared to binary CeO2/CS and Pt/CS composites. The probable enhanced charge transfer process in Pt–CeO2/CS has been proposed responsible for the enhanced photodegradation of MO dye and improved PEC water splitting performance. #chemistry #SNS #NUST https://lnkd.in/dS3sVaR9

A nanostructured TiZrNbTaMo high-entropy alloy thin film with exceptional corrosion properties for biomedical application

Investigation of structural and microstructural properties of hematite synthesized in the presence of oleic acid Research Overview: The study examines the synthesis of hematite (α-Fe2O3) using the co-precipitation method, employing oleic acid as a surfactant to prevent particle agglomeration. Various characterization techniques were employed: FTIR Analysis: Detected Fe-O bands within the 400 to 750 cm−1 range, signifying the presence of α-Fe2O3. XRD Analysis: Validated the formation of pure phase α-Fe2O3 in samples prepared without oleic acid. SEM Imaging: Illustrated the development of spherical particles with an average size below 200 nm, consistent with particle size distribution observed via Dynamic Light Scattering. UV-VIS Spectroscopy: Demonstrated strong absorption in the UV region and weak absorption in the visible region, indicating the optical characteristics of the synthesized hematite. In summary, the research offers insights into the structural and microstructural attributes of the synthesized hematite nanoparticles, showcasing the effectiveness of the co-precipitation method with oleic acid as a surfactant. DOI:https://lnkd.in/dMzMuS32 #SEMImaging #Spectroscopy #FTIR

I conducted an ultrasonication process on CuO-water nanofluid to evaluate the stability of the fluid without the use of surfactants. The goal was to perform an initial visual test to observe nanoparticle agglomeration over the course of a week or month. I ran the ultrasonication for 30 minutes, with 5-minute intervals for each sample, which had concentrations of 0.5%, 0.1%, 0.05%, 0.03%, and 0.01%. As anticipated, the higher concentration samples showed more significant nanoparticle agglomeration after just one day, due to the absence of surfactants to maintain stability. This is one of the five working fluids I'm researching to enhance convective heat transfer under constant heat flux using ultrasound.

Alhamdulillah, one of the most interesting articles on solid oxide fuel cells has been accepted by highly reputed journals! Thank you so much to all co-authors and collaborators for your contributions. Here's to many more successes in the future. Inshallah! 1. #Journal_of_Energy_Chemistry (IF= 14); #Cite_score (23.6) #Title: Tailoring BaCe0.7Zr0.1(Dy0.1|Yb0.1)0.2O3-δ electrolyte through strategic Cu doping for low-temperature proton conducting fuel cells: Envisioned theoretically and experimentally This study addresses the challenge of high sintering temperatures in proton-conducting fuel cells (PCFCs) with BaCeO3-doped electrolytes. We demonstrate that 1 mol% copper (Cu) doping at the B-site of BaCe0.7Zr0.1(Dy0.1|Yb0.1)0.2O3-δ (BCZDYb) improves sintering behavior, enabling densification at 1400°C. However, Cu doping disrupts stoichiometry, creating barium vacancies and reducing proton-accepting cations, affecting overall conductivity. This mechanism is confirmed through density functional theory (DFT) calculations and experimental data obtained from X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), elemental mapping (EDS), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and electrochemical impedance spectroscopy (EIS) respectively. The 1 mol% Cu-doped BCZDYb (BCZDYb-1) exhibits ~3.5 times higher conductivity when sintered at 1200°C and ~16 times higher grain boundary conductivity at 200°C when sintered at 1400°C, compared to undoped BCZDYb. A single cell employing BCZDYb-1 as the electrolyte achieved a power density of ~606 mW.cm-2 at 550°C. These results indicate that a controlled amount of Cu doping can enhance densification while maintaining high ionic conductivity, making it suitable for practical applications in PCFCs operating at lower temperatures.

I am happy to share the first publication of my PhD work, titled "Surface Complexation and Packed Bed Mass Transport Models Enable Adsorbent Design for Arsenate and Vanadate Removal." To better understand and predict how oxo-anions, either alone or in mixtures, behave in continuous-flow packed bed adsorption systems, we combined surface complexation models (SCMs) with a pore surface diffusion model (PSDM). Improving surface binding increased the effectiveness of the adsorption process, which is crucial for point-of-use (POU) adsorbent systems. Simulations suggest it is more effective to focus on enhancing adsorbent capacity (q) by improving surface reactivity, rather than trying to reduce mass transport limitations within the pores. Link: https://lnkd.in/gQc3f_Bx I thank my team and advisor Dr. Paul Westerhoff for their guidance and support. #WaterTreatment #Arsenic #Adsorption

BeNano Series from Bettersize Instruments, your friend in nanoparticle characterization with high quality and precision! BeNano Series can provide you lots of information such as: 01. Nanoparticle Size and Distribution from 0.3 nm - 15 um* based on Hydrodynamic Size : Intensity, Volume, Area, and Number Distributions 02. Polydispersity Index (PDI) 03. Diffusion Coeficient Translation & Rotation Stokes-Einstein 04. Viscosity of dispersant medium using tracer particles 05. Refractive index of dispersant medium (real part) using tracer particles 06. Zeta Potential and Its Distribution 07. Iso Electric Point (IEP) 08. Molecular Weight 09. Second Virial Coefficient 10. Microrheology : [Elastic (storage) modulus, Viscous (loss) modulus, Complex Viscosity, Creep compliance] BeNano can be attached with a GPC (Gel Permeation Chromatography) to increase size measurement resolution! fatih@nexus-analytics.co.id +6281295500228 #nanoparticles #dls #sls #lightscattering