Iranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416420201101Silica Coated Magnetic Nanoparticles for Biological Applications20921747975END. Chandra SekharDepartment of Engineering Chemistry, SRKR Engineering College, Bhimavaram-534204, India.Department of Chemistry, Acharya Nagarguna Univeristy, Guntur, IndiaBhagavathula S.DiwakarDepartment of Engineering Chemistry, SRKR Engineering College, Bhimavaram-534204, India.N. MadhaviP. G. Department of Chemistry, JKC College, Guntur-522006, India.Journal Article20191105<em> </em><em>The research paper describes the synthesis, characterization of Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>, BiFeO<sub>3</sub>@SiO<sub>2</sub>, ZnFe<sub>2</sub>O<sub>4</sub>@SiO<sub>2</sub>, BiFe<sub>0.9</sub>Zn<sub>0.1</sub>O<sub>3</sub>@SiO<sub>2</sub> and BiFe<sub>0.75</sub>Co<sub>0.25</sub>O<sub>3</sub>@SiO<sub>2</sub> nanoparticles. The materials were synthesized by chemical co-precipitation technique and are characterized by X-ray diffraction, Transmission electron microscope with EDS and Vibrating sample magnetometer. Further, the biocompatibility studies were performed on THP-1 cells. The results indicated that the developed nanoparticles have considered being good biocompatible materials.</em>https://www.ijnnonline.net/article_47975_4f77d91c87a06904e6f83aa386901e17.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416420201101Gum Acacia/Carbopol-Based Biocomposites Loaded with Silver Nnanoparticles as Potential Wound Dressings21923147976ENR. LekalakalaDepartment of Polymer Technology, Tshwane University of Technology, Pretoria, South Africa.B. A. AderibigbeDepartment of Chemistry, University of Fort Hare, Alice Campus, Alice, South Africa.0000-0003-1157-7481S. J. OwonubiDepartment of Chemistry, University of Zululand, KwaDlangezwa, KwaZulu-Natal, South Africa.E. R. SadikuDepartment of Polymer Technology, Tshwane University of Technology, Pretoria, South Africa.Y. T. FonkuiDepartment of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Johannesburg, South Africa.D. T. NdintehDepartment of Applied Chemistry, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa.S. S. RayDepartment of Applied Chemistry, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa.
DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, South Africa.Journal Article20200501<em> Wounds infected with bacteria are treated using wound dressings loaded with antibiotics</em><em>. However, the use of antibiotics has resulted in drug resistance. In order to overcome drug resistance common with most of the currently used antibiotics, several researchers have evaluated the potential of metal-based nanoparticles as antimicrobial agents. In this research, smart materials with good antibacterial activity were developed as potential wound dressings from a combination of bio- and synthetic polymers (gum acacia and carbopol, respectively) followed by loading with silver nanoparticles. The biocomposites were pH-sensitive with good water uptake. The hydrogels exhibited a high degree of swelling which increased with increase in pH. Their swelling capability was significant at pH of 7.4 simulating wound exudates. Their physicochemical properties were studied by FTIR, XRD, SEM and AFM. Furthermore, their antibacterial activity was significant against Gram-positive and Gram-negative strains of bacteria used in the study. The significant features of the biocomposites revealed their potential application as smart materials for the treatment of bacteria-infected and high exuding wounds.</em>https://www.ijnnonline.net/article_47976_5558bddd8cf28a9db362d757fa0b900f.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416420201101Improving the Dielectric Properties of the Ba(Zr0.1Ti0.9)O3-based Ceramics by Adding a Li2O–SiO2 Sintering Agent Step by Step 23324147977ENR. MaFaculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, P.O.Box 721013, Baoji, People’s Republic of China.B. CuiFaculty of Chemistry and Materials Science, Northwest University, P.O.Box 710127, Xi’an, People’s Republic of China.D. HuFaculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, P.O.Box 721013, Baoji, People’s Republic of China.Y. WangFaculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, P.O.Box 721013, Baoji, People’s Republic of China.W. ZhaoFaculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, P.O.Box 721013, Baoji, People’s Republic of China.M. TianFaculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, P.O.Box 721013, Baoji, People’s Republic of China.Journal Article20200212<em> To meet the needs of future multilayer ceramic capacitors</em><em>(MLCCs), </em><em>a </em><em>low sintering temperature, higher capacitance and thinner dielectric layers are necessary. To achieve this goal, </em><em>an </em><em>appropriate sintering agent and appropriate</em><em>doping technique must be developed to reduce the sintering temperature and optimize the ceramic’s</em><em>microstructure. In this study, we researched the effect of Li<sub>2</sub>O-SiO<sub>2</sub> (Li-Si-O) and how it is added on the dielectric properties of the Ba(Zr<sub>0.1</sub>Ti<sub>0.9</sub>)O<sub>3</sub>-based ceramics. The dielectric constant increased significantly</em><em> by</em><em> adding Li-Si-O step </em><em>by</em><em>step </em><em>,</em><em> but decreased with addition in a one-step </em><em>.</em><em> The dielectric constant</em><em>increased first and then decreased with the increasing of Li-Si-O conten</em><em>t</em><em>, and reached a maximum of 18942 at 0.10 wt% Li-Si-O, and the temperature-capacitance characteristic</em><em> (</em><em>TCC</em><em>)</em><em> of the samples with </em><em>a </em><em>Li-Si-O content less than 0.2</em><em>0</em><em> wt% met the Y5V standards. The Li-Si-O reduced the sintering temperature of the Ba(Zr<sub>0.1</sub>Ti<sub>0.9)</sub>O<sub>3</sub>-based</em><em>ceramics to 1100 °C, and the dielectric constant first increased and then decreased with increasing sintering temperature increasing.</em>https://www.ijnnonline.net/article_47977_eca59cd0abede54f7e6d54aa901ab752.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416420201101Botrytis Cinerea, One of the Most Destructive Plant Pathogens, as a Potent to Produce Silver Nanoparticles24324847978ENS. MirzaeiDepartment of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University,
Hamedan, Iran.0000-0002-9439-1844A. GhabooliDepartment of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University,
Hamedan, Iran.M. MirzaeiDepartment of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran.Journal Article20200101<em> Nanoparticles are synthesized using different physical and chemical methods. However, the development of an eco-friendly approach for the synthesis of nanoparticles is of critical importance to nanotechnology. Types of fungi which secrete a high amount of proteins are ideal candidates for the eco-friendly synthesis of nanoparticles. In this research, the extracellular biosynthesis of silver nanoparticles was implemented, using Botrytis cinerea. UV-vis spectroscopy illustrated a sharp peak at 420 nm, demonstrating the presence of silver nanoparticles in the fungal cell filtrate. Further analysis was accomplished through TEM and FTIR. Silver nanoparticles were spherical and 5.1-13.95 nm in diameter with an average size of 8.55 nm. NPs were stable three months after their formation, which is, quite likely, due to their capping with proteins which were secreted by the fungus. </em>https://www.ijnnonline.net/article_47978_6b4080d642b0cc816e09be3fc2037288.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416420201101A Novel Needle-Less Multi-Pin-Electrospinning Method to Fabricate Nanofibers from Dilute PAN Solution24925847979ENG. MoradiDepartment of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran.L. RajabiDepartment of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran.F. DabirianDepartment of materials and textile Engineering, College of Engineering, Razi University, Kermanshah, Iran.M. BabaeiDepartment of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran.Journal Article20190117<em> A novel needle-less electrospinning system, "Multi-pin-electrospinning" was developed to produce thin nanofibers from dilute Polyacrylonitrile (PAN) solutions. PAN solution was placed in an open polymer bath. 16 stainless steel pins in 4 parallel rows were attached to a metal rod to form stable polymer jets. Pins were dipped into a polymer solution by rotating the pins containing rod and under the application of the electric field, multiple Taylor cone were formed followed by the multi-jet ejection from the cone's tip, then nanofibers were deposited on the aluminum collector sheet placed above the pins. The multi-pin-electrospun nanofibers were thinner with narrower diameter distribution compared with electrospun nanofibers prepared through the conventional method. The influence of the affecting parameters such as solution concentration, applied voltage, pins-collector distance and addition of CaCl<sub>2</sub> salt on the diameter of multi-pin-electrospun nanofibers were investigated. The applied voltage change did not significantly affect the average diameter of nanofibers. At pins-collector distance of 6 cm, wet nanofibers with the beaded structure were formed, whereas on increasing the distance bundles in the fibers were disappeared and straight nanofibers with fewer beads were collected. The addition of 1 wt% CaCl<sub>2 </sub>salt to the 3 wt% PAN/DMF solution resulted in the formation of smooth, almost bead-free nanofibers. </em>https://www.ijnnonline.net/article_47979_4ec93c11f2f63db196cf1981d7dd4045.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416420201101Influence of Cathodic Arc Current on Structure, Mechanical and Tribological Properties of TiC/a-C:H Nano-multilayer Coatings25926947980ENC. X. TianSchool of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, China.Ch. ZouSchool of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, China.Z. S. WangSchool of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, China.B. YangSchool of Power & Mechanical Engineering, Wuhan University, 430072 Wuhan, China.D. J. FuSchool of Power & Mechanical Engineering, Wuhan University, 430072 Wuhan, China.V. O. PelenovichInstitute of Ion-Plasma and Laser Technologies, Academy of Sciences of Uzbekistan, 700135 Tashkent, Uzbekistan.A. TolstogouzovRyazan State Radio Engineering University, Gagarin Str. 59/1, Ryazan, 390005, Russian Federation.Journal Article20200526<em> </em><em>A cathodic arc ion plating system was used to produce TiC/a-C:H nano-multilayer coatings on silicon and cemented carbide substrates at cathodic arc currents in the range of 30-70 A. The microstructure, surface morphology and compositions of the TiC/a-C:H nano-multilayer coatings were analyzed by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The influence of the arc current on mechanical and tribological properties of the TiC/a-C:H nano-multilayer coatings was systemically investigated. The measurements show that the TiC/a-C:H multilayer coatings are composed of alternating layers of nanocrystalline TiC and amorphous hydrogenated carbon. The surface morphology of the TiC/a-C:H nano-multilayer coatings is controllable by the arc current. The ratio of Raman peak intensities I<sub>D</sub>/I<sub>G</sub> decreases and the full width at half maximum of G peaks (FWHM<sub>G</sub>) increases with the increasing of arc current. The content of hydrogen decreases from 26.5 at</em><em>.</em><em>% to 13.7 at.% while the content of TiC increases from 0.15at. % to 2.35 at.% as the arc current increases from 30 A to 70 A. The hardness of the TiC/a-C:H nano-multilayer coatings increases continuously up to 29.5 GPa at 70 A arc current. The average friction coefficients of the coatings keep at relatively lower values in the range of 0.1-0.2 as measured against Si<sub>3</sub>N<sub>4</sub> balls. The results show significant influences of the cathodic arc current on the microstructure and properties of the TiC/a-C:H nano-multilayer coatings.</em>https://www.ijnnonline.net/article_47980_2c2bf0d66ccc73a10ed69abf56507279.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-700416420201101Investigation of ZnO Nanoparticles on In Vitro Cultures of Coffee (Coffea Arabica L.) 27127747981ENJ. DevasiaPlant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., Mysore Karnataka, India.B. MuniswamyPlant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., Mysore Karnataka, India.M. K. MishraPlant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., Mysore Karnataka, India.0000000259394986Journal Article20190409<em> Tissue culture is a promising technique to produce a large number of true to type plants in coffee. One of the major obstacles encountered in in-vitro propagation is the high percentage of contamination of explants which is mainly observed when field grown plants are used as the source of explants. Several research studies were carried out to reduce the percentage of microbial contamination either using <span style="text-decoration: line-through;"> </span>disinfectants during explant preparation or antifungal and anti-bacterial chemicals in media. The present paper elucidates the effect of ZnO Nanoparticles (ZnO-NPs) in reducing contamination and enhancing recovery of in vitro cultured leaf explants of arabica coffee (Coffea arabica). MS media containing ZnO-NP at three different concentrations were tested in an improved hybrid line of Coffea arabica (S.4595). Among the various concentrations tested, media containing 25mg/L of ZnO-NPs showed maximum recovery of explants. ZnO-NPs also positively influenced the induction of callus and somatic embryos which was significantly higher than the control.</em>https://www.ijnnonline.net/article_47981_75f4eb2f559670d0c8bc469675302389.pdf