Iranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700417120210301TiO2/Ag2O-Exfoliated Graphite as Visible Light-Responsive Nanostructure for Improved Photoelectrochemical Degradation of BPA110242798ENO. M.AmaDepartment of Applied Chemistry, University of Johannesburg,
Doornfontein, 2028, Johannesburg, South AfricaDST-CSIR National Center for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South AfricaKh.KhoeleTshwane University of Technology, Department of Chemical, Metallurgical and Materials Engineering, Pretoria, South AfricaDST-CSIR National Center for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South AfricaS. S.RayDepartment of Applied Chemistry, University of Johannesburg,
Doornfontein, 2028, Johannesburg, South AfricaDST-CSIR National Center for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South AfricaJournal Article20190204<em> </em><em>In this paper, exfoliated graphite (EG), titanium dioxide (TiO<sub>2</sub>), silver oxide (Ag<sub>2</sub>O) and TiO<sub>2</sub>-Ag<sub>2</sub>O/ EG have synthesized, fabricated and characterized. An electrolyte used in this work was Bisphenol A (BPA). Degradation was carried out under electrochemical oxidation, photolysis and photoelectrochemical. Characterization techniques utilized were: ultraviolet–visible (UV) diffuse reflectance analysis, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX), Raman, thermal gravimetric analyzer (TGA), and X-ray diffractometry (XRD). SEM morphologies, EDX and the XRD patterns showed a good mix and disperse among nanocomposites in terms of the formation of TiO<sub>2</sub>-Ag<sub>2</sub>O/EG. Degradation analysis revealed TiO<sub>2</sub>-Ag<sub>2</sub>O/ EG as the best nanocomposite for degradation of azo dyes from the wastewater. On a relative view of engaged techniques, photoelectrochemical revealed to be worthwhile.</em>https://www.ijnnonline.net/article_242798_ede529b2f98a369876ae5179ef04d3df.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700417120210301Design of Encoder Circuit Using Layered NAND and NOR Gates in Quantum Dot Cellular Automata 1121242799ENR.ChakrabartyDepartment of Electronics & Communication Engineering, Institute of Engineering & Management, Salt Lake, Kolkata, West Bengal 700091, IndiaN. K.MandalDepartment of Electronics & Communication Engineering, University of Engineering & Management, Newtown, Kolkata, West Bengal 700160, IndiaJournal Article20200130<em> Quantum dot cellular automata or QCA represents a new methodology of quantum computing with the potential for higher performance over existing devices.</em><em>It adds necessary features such as enhanced speed, smaller size and lower power consumption in comparison to existing CMOS based technology. Based on this study the proposed paper designed three </em><em>different kinds of encoder circuits using QCA technology. Following paper used layered 2-input NAND gate and NOR gates to design 4 to 2 encoder, priority encoder and octal to binary encoder circuits. The paper also showed the cell count, area, length, breadth & latency calculations for the designed encoder circuits. Proposed circuits are compared with the previously suggested designs in terms of area consumption and cell count. All the circuits designed without majority gate circuit. Potential energy for the designed circuits also calculated to check the stable output and reliability of the circuits. </em>https://www.ijnnonline.net/article_242799_347867b574298f12029f4c24c563bbe4.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700417120210301Synthesis, Characterization, Antibacterial and Anticancer Properties of Silver Nanoparticles Synthesized from Carica Papaya Peel Extract2332242800ENT.JohnDepartment Physics, Faculty of Science, Pacific University, Udaipur, Rajasthan, IndiaK. A.ParmarDepartment Chemistry, Faculty of Science, HNG University, Patan, Gujarat, IndiaSh. C.KotvalDepartment Chemistry, Faculty of Science, HNG University, Patan, Gujarat, IndiaJ.JadhavDepartment Chemistry, Faculty of Science, HNG University, Patan, Gujarat, IndiaJournal Article20180507<em> In the present generation, there is a commercial demand for silver nanoparticles due to their widespread applications. In this study, silver nanoparticles were synthesized using Carica papaya peel extract as a reducing agent. The synthesized nanoparticles were characterized under UV-Visible spectrophotometer, FTIR, SEM, XRD and TEM. UV-Visible spectrophotometer was used to monitor the formation of silver nanoparticles. The TEM analysis shows that the silver nanoparticles have an average size of 50 nm. X-ray diffraction analysis showed that the particles were crystalline in nature. The antibacterial activity of silver nanoparticles was performed on various gram-positive and gram-negative bacteria. These silver nanoparticles showed a significant cytotoxic effect against both, MCF-7 and Hep-2 cells.</em>https://www.ijnnonline.net/article_242800_240402f6862bc10a457aef435beae40e.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700417120210301Temperature Dependence of I-V Characteristics in CNTFET Models: A Comparison3339242801ENR.MaraniInstitute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing (STIIMA), National Research Council of Italy0000-0002-5599-903XA. G.PerriElectronic Devices Laboratory, Department of Electrical and Information Engineering, Polytechnic University of Bari, Italy0000-0003-4949-987XJournal Article20201208 <em>In t</em><em>his paper we present </em><em>a comparison of temperature dependence of I-V characteristics in Carbon Nanotube Field Effect Transistor (CNTFET) models proposed in the literature in order to identify the one more easily implementable in simulation software for electronic circuit design. At first we consider a compact, semi-empirical model, already proposed by us</em><em>, performing</em><em> I-V characteristic simulations at different temperatures. Our results are compared with those obtained with the </em><em>Stanford-Source Virtual Carbon Nanotube Field-Effect Transistor model (VS-CNFET), obtaining </em><em>I-V characteristics comparable</em><em>, but with </em><em>CPU calculation times much lower.</em>https://www.ijnnonline.net/article_242801_751ccf0df7537a1aef069021b74740e3.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700417120210301Eco-Friendly Fabrication of Fe3O4/MWCNT/ZnO Nanocomposites from Natural Sand for Radar Absorbing Materials4153242802ENA.TaufiqDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia 0000-0002-0155-6495S. T. U.Intan SubadraDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia 0000-0002-6604-4466N.HidayatDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia 0000-0001-9232-7454S.SunaryonoDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia 0000-0001-5033-3549A.HidayatDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia 0000-0002-6015-1009E.HandokoDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Indonesia0000-0003-1667-1805M.MunasirDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya, Indonesia0000-0002-9526-3959M.AlaydrusDepartment of Electrical Engineering, Universitas Mercu Buana, Indonesia0000-0002-2195-1230L.ChuenchomDepartment of Chemistry, Prince of Songkla University, Thailand0000-0002-2931-3428Journal Article20200703<em> </em><em>This paper reports on the fabrication of Fe<sub>3</sub>O<sub>4</sub>/MWCNT/ZnO nanocomposites (NCs) using natural iron sand as the primary precursor for radar absorbing materials. The addition of ZnO nanoparticles (NPs) was carried out to enhance the radar absorption performance of Fe<sub>3</sub>O<sub>4</sub>/MWCNT/ZnO NCs by improving their impedance. The X-ray diffraction patterns of Fe<sub>3</sub>O<sub>4</sub>/MWCNT/ZnO NCs demonstrated the inverse spinel cubic and hexagonal wurtzite structures for Fe<sub>3</sub>O<sub>4</sub> NPs and ZnO NPs, respectively. The infrared spectra showed the presence of C=C, Fe-O, and Zn-O functional groups, which exhibited characteristics of MWCNT, Fe<sub>3</sub>O<sub>4</sub>, and ZnO, respectively. Such results were also confirmed by the results of energy dispersive X-ray investigation showing elements C, O, Fe, and Zn. The Fe<sub>3</sub>O<sub>4</sub>/MWCNT/ZnO NCs with superparamagnetic character decreased their saturation magnetization values due to the increasing ZnO NPs composition. Based on the optical data analysis, the bandgap energy of Fe<sub>3</sub>O<sub>4</sub>/MWCNT/ZnO NCs increased from 2.242 to 3.533 eV as the increasing ZnO NPs. Interestingly, the Fe<sub>3</sub>O<sub>4</sub>/MWCNT/ZnO NCs had a very high radar-absorbing performance ranging from 90%</em>–<em>99% with an optimum reflection loss of </em>–<em>34.2 dB at a frequency of 11.8 GHz. Thus, it implies that the Fe<sub>3</sub>O<sub>4</sub>/MWCNT/ZnO NCs provide a great opportunity as new material for developing radar-absorbing applications. Furthermore, the use of iron sand, which is economical and abundant in nature, has a very promising potential for producing large-scale antiradar materials.</em>https://www.ijnnonline.net/article_242802_967e704541da1511608aa04919ec49f6.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700417120210301Study on Polystyrene/MWCNT Nanocomposite as a Temperature Sensor5563242803ENA.RahimiRadiation Application Research School, Nuclear Science Technology Research Institute, P. O. Box 11365-3486, Tehran, IranS.MalekieRadiation Application Research School, Nuclear Science Technology Research Institute, P. O. Box 11365-3486, Tehran, IranA.MosayebiRadiation Application Research School, Nuclear Science Technology Research Institute, P. O. Box 11365-3486, Tehran, IranN.SheikhRadiation Application Research School, Nuclear Science Technology Research Institute, P. O. Box 11365-3486, Tehran, IranF.ZiaieRadiation Application Research School, Nuclear Science Technology Research Institute, P. O. Box 11365-3486, Tehran, Iran0000-0002-1726-7081Journal Article20200413<em> The aim of this research is to fabricate a novel temperature sensor for any calorimetry system. A new mixed solution method was introduced to prepare polystyrene/multiwall carbon nanotube nanocomposite samples with different weight percentages as 0.05, 0.1, 0.28, 1, and 2 of MWCNTs. To demonstrate the dispersion state of the inclusion into the polymer matrix, the SEM analysis was applied. Also, XRD and Raman spectroscopy analyses were carried out. The electrical percolation threshold was investigated and achieved at about 0.28 weight percent of the inclusion. Finally, the electrical resistance of the samples was measured from room temperature up to ~100ºC. Consequently, positive temperature coefficient and negative temperature coefficient effects were observed before and after T<sub>g</sub> for the most nanocomposite samples, respectively. The best linear response of the resistance-temperature curve was achieved at 20-50ºC, which using a second-order fitting curve it can be used up t0 ~70ºC. Results show that the polystyrene/multiwall carbon nanotube nanocomposite near the percolation threshold can be used as a temperature sensor for calorimetric purposes. </em>https://www.ijnnonline.net/article_242803_111c49d6bffef8b7cc8ef6f040fdb17c.pdf