Iranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700418220220501Investigation of Compressive Strength of Cement/Silica Nanocomposite Using Synthesized Silica Nanoparticles from Sugarcane Bagasse Ash 9398252425ENS.BasnetDepartment of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, NepalS.ShahDepartment of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, NepalR.JoshiDepartment of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, NepalR.PanditDepartment of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, Nepal0000-0002-6663-8950Journal Article20210630<em> The effect of silica nanoparticles used as a nanoporous additive in cement was studied with various wt- % ratios. Saccharum officinarum bagasse, an agricultural waste residue was used to synthesize silica nanoparticles as it contains a high amount of silica. The synthesized silica nanoparticles were characterized through XRD and FTIR spectroscopic analysis techniques. By the analysis of XRD, crystalline peaks were found to be particularly of quartz form of silica with an average size of 25.58 nm. The characteristic functional group of the extracted silica nanoparticle was observed at various absorption bands such as the peaks at 1056 cm<sup>-1</sup> and 794 cm<sup>-1</sup> correspond to Si-O-Si asymmetric and Si-O symmetric stretching modes respectively. The extracted silica nanoparticles were applied to form nanocomposites with cement to investigate their compressive strength and the silica nanoparticle was found to increase the compressive strength of cement due to the pozzolanic reaction of silica nanoparticles with Ca(OH)<sub>2</sub>. </em>https://www.ijnnonline.net/article_252425_fbe73fab41f02d0bd8a037a128cc5f72.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700418220220501Green Synthesis of Copper Nanoparticles using Aqueous Extract of Yerba Mate (llex Paraguarients St. Hill) and its Anticancer Activity99108252426ENA.MajidDepartment of Chemistry, College of Science, University of Thi-Qar, Nasiriyia, IraqH. R.FarajDepartment of Chemistry, College of Science, University of Thi-Qar, Nasiriyia, IraqJournal Article20211209<em> Nanotoxicology is a major field of study that exposes dangerous effects of nanomaterials on the living cells. In the present study, an extract of llex paraguarients St. Hill in distill water was firstly prepared. This extract was added to 1 mM of Cupric sulfate solution, and the change in the color of the solution from colorless to colored solution was detected. This change in color indicates that there is a formation of CuNPs. Secondly, Copper nanoparticles (CuNPs) were prepared by the chemical reduction method and characterized by the utility of different techniques such as: UV-Vis spectrometer, FTIR spectroscopy and SEM with EDAX. The evaluation of the toxicity of CuNPs was performed on human lung carcinoma cell (A549). The half-maximal inhibitory concentration IC50 of CuNPs for human lung carcinoma cell (A549) was determined. CuNPs suppressed proliferation and viability of carcinoma lung cells. Overall, the results show that the IC50's of the prepared Cu NPs were cytotoxic to cancerous lung cells.</em>https://www.ijnnonline.net/article_252426_0ed81b70b11cf4aa2f848f31a3f25ae3.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700418220220501Graphene Assisted Photodegradation of Pollutant Dyes and its Pragmatic Effect on Lemna Minor and Eichhornia Crassipes 109122252427ENP.MandalDepartment of Chemistry, National Institute of Technology – Agartala, Jirania, Tripura – 799046, India 0000-0002-8481-6642J.DebbarmaDepartment of Chemistry, National Institute of Technology – Agartala, Jirania, Tripura – 799046, India 0000-0001-6861-2845M.SahaDepartment of Chemistry, National Institute of Technology – Agartala, Jirania, Tripura – 799046, India 0000-0002-0535-8293Journal Article20210904<em> </em><em>Graphene assisted photodegradation have been used extensively as a remedial measure against pollutant dyes over last few years. The present work highlighted the comparative photodegradation effects between functionalized graphene oxide (GO) and non-functionalized graphene (Gr) maintained at room temperature (~27<sup>o</sup> C) against three different pollutant dyes viz. malachite green (MG), methylene blue (MB) and methyl orange (MO) under visible light exposure at neutral medium (pH ~ 7). The degradation of MG and MB were remarkably high upon using the functionalized GO while non-functionalized Gr had comparatively less degradation efficiency against both these dyes. On the other hand, Gr was found to be effective than GO in combatting the azoic MO dye due to poor recombination of carrier charges. The photodegradation </em><em>of 1:1:1 mixture of MG:MB:MO (dye cocktail) was studied in presence of GO, separated in HPLC to estimate the degradation efficiency of each dye. The mineralized products obtained from the LC-MS/MS suggested the fragmentations in each dye occurred via demethylation route followed by asymmetric cleaving. </em><em> In real-time, the growth assessment of Lemna Minor and Eichhornia crassipes was monitored in dye cocktail alone and in presence of GO treated dye cocktail.</em>https://www.ijnnonline.net/article_252427_fbef2bfcd9a5d81ba323e18eee28332b.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700418220220501Preparation of Composites of Antibacterial Materials Based on Bacterial Cellulose and Silver Nanoparticles for Wound Healing123133252428ENB.RakhimovaFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 050040, Almaty, KazakhstanScientific and Production Technical Center “Zhalyn” LLP, 050012, Almaty, Kazakhstan0000-0002-7433-1094K.KudaibergenovFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 050040, Almaty, Kazakhstan0000-0002-5444-0314L.SassykovaFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 050040, Almaty, Kazakhstan0000-0003-4721-9758G.SpanovaFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 050040, Almaty, Kazakhstan0000-0002-2911-4146S.AknazarovFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 050040, Almaty, KazakhstanScientific and Production Technical Center “Zhalyn” LLP, 050012, Almaty, KazakhstanM.TulepovFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 050040, Almaty, Kazakhstan0000-0002-6449-9571Journal Article20210628<em> This study examined the preparation of composites of Bacterial Cellulose (BC) / silver nanoparticles (</em><em>Ag NPs) using a substrate for the fermentation of the bacteria Gluconacetobacter xylinus C-3 and a reducing agent for the synthesis of silver nanoparticles in situ. The presence of silver in the BC/</em> <em>Ag NPs composites was confirmed by various characterization tests. Thus, according to Scanning Electron Microscopy, the average size of silver was recorded at 700 nm. X-ray phase analysis showed an increase in the size of cellulose crystallites up to 122 Å with a decrease in the amount of silver nanoparticles. According to UV-visible spectroscopy, an identification peak was found between 420-580 nm. Measurements of the percentage of water absorption and the edge angles of wetting with water confirmed the structures of the resulting nanocomposites - with a smaller pore diameter and a narrow pore distribution over the film size, depending on the silver content. Using the disk diffusion method, excellent antimicrobial activity was shown with a decrease in the number of bacteria in relation to the pathogenic microorganism Staphylococcus (S.) aureus, Pseudomonas (P.) aeruginosa, Escherichia (E.) coli. </em>https://www.ijnnonline.net/article_252428_677e7b5a7940508fd61493b9c9c5e9c6.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700418220220501Performance Evaluations of Ammonia Sensors Using Cladding Modified Single-Mode Optical Fiber Coated with Polyaniline Nanofibers135141252429ENH. A.MohammedElectronic and Communication Engineering Department, College of Engineering, University of Baghdad, Baghdad, IraqWireless and Photonics Network Research Centre, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia0000-0002-6001-2500A.AlmamoriElectronic and Communication Engineering Department, College of Engineering, University of Baghdad, Baghdad, IraqS.GirieWireless and Photonics Network Research Centre, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, MalaysiaDepartment of Computer Engineering, Federal Polytechnic Mubi, Adamawa State, NigeriaM. H.Abu BakarWireless and Photonics Network Research Centre, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, MalaysiaS. B. A.AnasWireless and Photonics Network Research Centre, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, MalaysiaM. A.MahdiWireless and Photonics Network Research Centre, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, MalaysiaM. H.YaacobWireless and Photonics Network Research Centre, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, MalaysiaJournal Article20211211<em> In this paper, we developed a cladding modified optical fiber to detect low concentrations of ammonia (NH<sub>3</sub>). The Modification is coating with polyaniline (PANI) nanofibers. By using single mode optical fiber (SMF), two sensors are fabricated. The first one is etched with the chemical agent which is hydrofluoric acid (HF), and the other is tapered with a glass processing workstation so that the waist diameters of 15 µm for both modified sensors. Modified fibers are spray coated. The modification done on SMFs considerably enhances the interaction between them. The proposed modification is considerably enhancing how the evanescent field and the (PANI) sensing layer interact with each other. The modified SMF sensors are subjected to NH<sub>3</sub> with different concentrations within the visible wavelength range. The modified SMF and the nanostructured PANI films pattern results in a highly sensitive ammonia sensor at room temperature. The tapered SMF coated with PANI works better compared with the etched SMF. The results show that the response equals 89s, the recovery times equal 433s, and the sensitivity equals 139.1%. The modified fiber sensors have a limit of detection (LOD) of 0.0034% (34 ppm).</em>https://www.ijnnonline.net/article_252429_c2f615e5e217ab9e5f6f0c3f83438e9a.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700418220220501Magneto Effects on Fe3O4 Nanoparticles through the Triangular and Rectangular Baffles on Thread Stretching Surface for Rotary Seals in Computer Hardware143156252430ENM. M.PeiraviDepartment of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran0000-0001-5426-3445A.AshabiUM Power Energy Dedicated Advanced Centre (UMPEDAC), University of Malaya,
Kuala Lumpur, MalaysiaJournal Article20210904<em> In this paper, variation of temperature and velocity profiles and the angular velocity of the nanofluid flow through triangular and rectangular baffles are investigated in the existence of a uniform magnetic field. The innovation of this paper is the investigation of nanofluid parameters passing on the different baffles on the stretching surface using the Finite Element Method. According to the results of different cases, the maximum nanofluid velocity is observed in rectangular baffles. The fluid velocity for nanofluid on the rectangular baffles is 19.5% more than on other baffles. At X=0.2 to X=0.8 for rectangular baffles and triangular baffles, the average velocity of nanofluid flow in the rectangular baffles is equal to u=0.4 but, the average velocity of nanofluid flow in the triangular baffles is u=0.04. The maximum nanofluid temperature is observed in rectangular and triangular baffles. The temperature profiles of nanofluid on the rectangular and triangular baffles are 50% more than other baffles.</em>https://www.ijnnonline.net/article_252430_5385f8e4ce29a0357fe480e0d4494aaf.pdf