@article { author = {Bay, M. A. and Khademieslam, Habibollah and Bazyar, B. and Najafi, A. and Hemmasi, A. H.}, title = {Mechanical and Thermal Properties of ‎Nanocomposite Films Made of Polyvinyl ‎Alcohol/Nanofiber Cellulose and ‎Nanosilicon Dioxide using Ultrasonic ‎Method}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {17}, number = {2}, pages = {65-76}, year = {2021}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {   Cellulose Nano fibrils have strong reinforcing properties when incorporated in a compatible polymer matrix. The aim of this study was to investigate the thermal and mechanical properties of the nanocomposite Nano composite made of poly vinyl alcohol (PVA)- Nano fiber celluloses (NFC)-Nano silicon dioxide Samples of the nanocomposite Nano composite were prepared by the casting method with different Nano cellulose and Nano silicon dioxide loadings. Then, samples were exposed to tensile test, Thermo Gravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). The morphology of both neat poly (vinyl alcohol) and Nano composites was explored by using the field emission Scanning Electron Microscope technique (SEM). Results of tensile test indicated that the tensile strength and Young’s modulus of poly (vinyl alcohol) composite Nano composite were significantly improved with the increase of cellulose Nano fibrils loading. Also, the Ultimate strength (UTS) decreased as the Sio2 contents increased. The addition of 5 and 10 wt% of Nano silicon dioxide successfully improved the thermal stability and crystallinity of the PVA/Nano cellulose composites. Results indicated that the Nano cellulose had a great potential to reinforce PVA polymers.}, keywords = {Polyvinyl alcohol,Nanofibercellulose,Nano silicon dioxide,Mechanical properties,Thermal ‎properties.‎}, url = {https://www.ijnnonline.net/article_244181.html}, eprint = {https://www.ijnnonline.net/article_244181_0bde7ec35e593e99cb6c063f7ad29b6c.pdf} } @article { author = {Jafaripour, N. and Omidvar, H. and Saber-Samandari, S. and Mohammadi, R. and Shokrani Foroushani, R. and Kamyab Moghadas, B. and Soleimani, M. and Noshadi, B. and Khandan, A.}, title = {Synthesize and Characterization of a Novel ‎Cadmium Selenide‏ ‏Nanoparticle with Iron ‎Precursor Applicable in Hyperthermia of ‎Cancer Cells}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {17}, number = {2}, pages = {77-90}, year = {2021}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {   Many researchers have considered the idea of using heat to shrink cancer cells and treat cancer. However, efforts in recent years have led to creating novel material more practical in clinical application. The main reason for the synthesis and producing these materials is to raise the temperature in the right place so that healthy cells around the cancerous tissue are not harmed. Nowadays, this can be partly achievable with new devices and methods. Also, cadmium selenide (CdSe) nanoparticles with zinc selenide (ZnS) coating for special optical properties were investigated in this work. The CdSe nanoparticles have a wide application in biomedical engineering, including detecting cancer tumors and hyperthermia. There are various methods for synthesizing CdSe nanoparticles, such as precipitation, wet chemistry, mechanical activation, and mechanochemical technique. In this study, we have tried to use an economical method to control Cd ions' toxicity. After fabricating the nanoparticles, vibrating sample magnetometer (VSM), and hyperthermia analyses (HT), X-ray diffraction (XRD), and scanning electron microscopy (SEM) technique were performed to characterize the magnetization, thermal changes versus time, phase, and morphology of the synthesized nanoparticles. The obtained results indicated that the CdSe successfully synthesized using chemical segmentation for biomaterials applications.}, keywords = {Quantum dots,Hyperthermia,Radiation Therapy,Magnetic nanoparticles,Chemical segmentation.‎}, url = {https://www.ijnnonline.net/article_244182.html}, eprint = {https://www.ijnnonline.net/article_244182_64cf9b3db7826d293b5e1774bbc6aa74.pdf} } @article { author = {Laghari, S. and Khuhawar, M. Y.}, title = {Rapid Visual Detection of Imipramine, ‎Citalopram, and Sertraline by Citrate-‎Stabilized Silver Nanoparticles}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {17}, number = {2}, pages = {91-107}, year = {2021}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {   The present study investigated the use of citrate-stabilized silver nanoparticles (Cit-AgNPs) as a colorimetric probe for the visual detection of three antidepressants imipramine, citalopram, and sertraline. Colorimetric approach relied on color change of Cit-AgNPs due to aggregation induced by antidepressants. UV-Vis spectroscopy, scanning electron microscopy (SEM), dynamic light scattering (DLS), zeta potential, and Fourier transform infrared spectroscopy (FT-IR) were used to characterize Cit-AgNPs before and after the reaction with antidepressants. It was found that surface plasmon resonance band of Cit-AgNPs centered at 400 nm was red shifted with concomitant color change from yellow to reddish brown, dark green, and red due to addition of imipramine, citalopram, and sertraline, respectively. Colorimetric response was linearly related to antidepressants concentration over the calibration range of 2-10 µg mL-1 with detection limits of 0.40, 0.25, and 0.39 µg mL-1 for imipramine, citalopram, and sertraline, respectively. Besides this, the proposed sensing strategy is capable of detecting the cited antidepressants in pharmaceutical preparations, spiked, and real deproteinized blood and urine samples without requiring light sensitive dyes, complicated equipment and organic co-solvents.}, keywords = {Biological fluids,Citalopram,Colorimetric sensor,Imipramine,Pharmaceutical preparations,‎Sertraline,Silver nanoparticles.‎}, url = {https://www.ijnnonline.net/article_244183.html}, eprint = {https://www.ijnnonline.net/article_244183_260a6d1878503876f7e111607ee72222.pdf} } @article { author = {Lakshmanan, S. P. and Jostar, S. T. and Arputhavalli, G. J. and Jebasingh, S. and Josephine, C. M. R.}, title = {Role of Green Synthesized CuO ‎Nanoparticles of Trigonella Foenum-‎Graecum L. Leaves and their Impact on ‎Structural, Optical and Antimicrobial ‎Activity ‎}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {17}, number = {2}, pages = {109-121}, year = {2021}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {   The present research work focused on the synthesis, characterization and testing of antimicrobial activity of CuO nanoparticles prepared by green synthesis method usingTrigonella foenum-graecum L. leaf extract. The XRD pattern indicated the presence of cubic structure of nanocrystalline CuO with crystallite size of 47 nm. The optical band gap was calculated using Tauc’s plot and found to be 3.6 eV. SEM images revealed that the particles had cluster structures with a combination of different shapes. EDAX analysis confirmed the presence of copper and oxide by indicating predominant peak which was the highest percentage present in the spectrum. The synthesized nanoparticles showed significant antibacterial and antifungal activity against the human pathogens Staphylococcus aureus and Penicillium sp. So this nanoparticle can be considered as an alternate approach for reducing the adhesion ofmicro-organisms. }, keywords = {CuO,Green synthesis,structural properties,morphological,Antimicrobial activity.‎}, url = {https://www.ijnnonline.net/article_244184.html}, eprint = {https://www.ijnnonline.net/article_244184_cb0359f96a960029a66e509209a20a02.pdf} } @article { author = {Marani, R. and Perri, A. G.}, title = {Comparative Analysis of Noise in Current ‎Mirror Circuits based on CNTFET and MOS ‎Devices}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {17}, number = {2}, pages = {123-131}, year = {2021}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {   In this paper we study an application of CNTFET in the design of current mirrors, key components of analogue circuits, in order to examine the noise behavior of  CNTFETs. We compare the CNTFET with a MOSFET of comparable scale and we present the results obtained using simulation for two different current mirror circuits, each time with different current values. To achieve this goal we use a semi-empirical compact CNTFET model, already proposed by us, including noise source contributions, and the BSIM4 model for MOS device. After the simulation of the I-V curves, the differential output resistance and the output impedance at various frequencies, we present the spectral density of output noise current, obtaining for all proposed cases that the output noise current is always higher for the CNTFET than for the MOS device. }, keywords = {CNTFET,MOSFET,Modelling,Circuit Mirror Circuits,Static and Dynamic Analysis,Noise behaviour.‎}, url = {https://www.ijnnonline.net/article_244185.html}, eprint = {https://www.ijnnonline.net/article_244185_bcfc49fd39f7dc9ecc530d81eb9c1ac8.pdf} } @article { author = {Shahbazi-Alavi, H. and safaei-Ghomi, J.}, title = {Ionic Liquid Attached to Colloidal Silica ‎Nanoparticles as Catalyst for the ‎Synthesis of Pyrimidines}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {17}, number = {2}, pages = {133-140}, year = {2021}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {   Bis (1(3-trimethoxysilylpropyl)-3-methyl-imidazolium) copper tetrachloride tethered to colloidal silica nanoparticles have been used as an efficient catalyst for the preparation of 2,4-diamino-6-arylpyrimidine-5-carbonitrile derivatives by the one-pot reaction of aromatic aldehydes, malononitrile, and guanidinehydrochlorideunder conventional heating, microwave and ultrasound irradiations. The catalyst was characterized by 1H NMR spectroscopy,dynamic light scattering (DLS), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and thermogravimetric analysis (TGA). The remarkable advantages of this methodology are easy work-up, short reaction times, high to excellent product yields, operational simplicity, low catalyst loading and use of ultrasonic irradiation as a valuable and powerful technology.}, keywords = {Pyrimidine,Heterogeneous catalyst,Ionic liquid,Colloidal silica nanoparticles,Microwave,‎Ultrasound irradiation.‎}, url = {https://www.ijnnonline.net/article_244186.html}, eprint = {https://www.ijnnonline.net/article_244186_7634516fc744542370455d098d895176.pdf} }