Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 16 4 2020 11 01 Silica Coated Magnetic Nanoparticles for ‎Biological Applications 209 217 47975 EN D. Chandra Sekhar ‎Department of Engineering Chemistry, SRKR Engineering College, Bhimavaram-534204, India.‎ Department of Chemistry, Acharya Nagarguna Univeristy, Guntur, India Bhagavathula S. Diwakar ‎Department of Engineering Chemistry, SRKR Engineering College, Bhimavaram-534204, ‎India.‎ N. Madhavi ‎P. G. Department of Chemistry, JKC College, Guntur-522006, India.‎ Journal Article 2019 11 05 The research paper describes the synthesis, characterization of Fe3O4@SiO2, BiFeO3@SiO2, ZnFe2O4@SiO2, BiFe0.9Zn0.1O3@SiO2 and BiFe0.75Co0.25O3@SiO2 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.

https://www.ijnnonline.net/article_47975_a136b3db552c0597fdd3b2b54ed5868b.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 16 4 2020 11 01 Gum Acacia/Carbopol-Based ‎Biocomposites Loaded with Silver ‎Nnanoparticles as Potential Wound ‎Dressings 219 231 47976 EN R. Lekalakala ‎Department of Polymer Technology, Tshwane University of Technology, Pretoria, South ‎Africa.‎ B. A. Aderibigbe Department of Chemistry, University of Fort Hare, Alice Campus, Alice, South Africa.‎ 0000-0003-1157-7481 S. J. Owonubi Department of Chemistry, University of Zululand, KwaDlangezwa, KwaZulu-Natal, South ‎Africa.‎ E. R. Sadiku Department of Polymer Technology, Tshwane University of Technology, Pretoria, South ‎Africa.‎ Y. T. Fonkui Department of Biotechnology and Food Technology, Faculty of Science, University of ‎Johannesburg, Johannesburg, South Africa.‎ D. T. Ndinteh Department of Applied Chemistry, University of Johannesburg, Doornfontein Campus, ‎Johannesburg, South Africa.‎ S. S. Ray Department 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 Article 2020 05 01 Wounds infected with bacteria are treated using wound dressings loaded with antibiotics. 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.

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Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 16 4 2020 11 01 Improving the Dielectric Properties of the ‎Ba(Zr0.1Ti0.9)O3-based Ceramics by Adding ‎a Li2O–SiO2 Sintering Agent Step by Step ‎ 233 241 47977 EN R. Ma Faculty 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. Cui Faculty of Chemistry and Materials Science, Northwest University, P.O.Box 710127, Xi’an, ‎People’s Republic of China.‎ D. Hu Faculty 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. Wang Faculty 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. Zhao Faculty 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. Tian Faculty 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 Article 2020 02 12 To meet the needs of future multilayer ceramic capacitors(MLCCs), a low sintering temperature, higher capacitance and thinner dielectric layers are necessary. To achieve this goal, an appropriate sintering agent and appropriatedoping technique must be developed to reduce the sintering temperature and optimize the ceramic’smicrostructure. In this study, we researched the effect of Li2O-SiO2 (Li-Si-O) and how it is added on the dielectric properties of the Ba(Zr0.1Ti0.9)O3-based ceramics. The dielectric constant increased significantly by adding Li-Si-O step bystep , but decreased with addition in a one-step . The dielectric constantincreased first and then decreased with the increasing of Li-Si-O content, and reached a maximum of 18942 at 0.10 wt% Li-Si-O, and the temperature-capacitance characteristic (TCC) of the samples with a Li-Si-O content less than 0.20 wt% met the Y5V standards. The Li-Si-O reduced the sintering temperature of the Ba(Zr0.1Ti0.9)O3-basedceramics to 1100 °C, and the dielectric constant first increased and then decreased with increasing sintering temperature increasing.

https://www.ijnnonline.net/article_47977_930f629e8b7182f0a51582b15ba86160.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 16 4 2020 11 01 Botrytis Cinerea, One of the Most ‎Destructive Plant Pathogens, as a Potent ‎to Produce Silver Nanoparticles 243 248 47978 EN S. Mirzaei Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University,‎ Hamedan, Iran.‎ 0000-0002-9439-1844 A. Ghabooli Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University,‎ Hamedan, Iran.‎ M. Mirzaei Department of Materials Science and Engineering, School of Engineering, Shiraz University, ‎Shiraz, Iran.‎ Journal Article 2020 01 01 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.

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Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 16 4 2020 11 01 A Novel Needle-Less Multi-Pin-‎Electrospinning Method to Fabricate ‎Nanofibers from Dilute PAN Solution 249 258 47979 EN G. Moradi Department of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi ‎University, Kermanshah, Iran.‎ L. Rajabi Department of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi ‎University, Kermanshah, Iran.‎ F. Dabirian ‎Department of materials and textile Engineering, College of Engineering, Razi University, ‎Kermanshah, Iran.‎ M. Babaei Department of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi ‎University, Kermanshah, Iran.‎ Journal Article 2019 01 17 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 CaCl2 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% CaCl2 salt to the 3 wt% PAN/DMF solution resulted in the formation of smooth, almost bead-free nanofibers.

https://www.ijnnonline.net/article_47979_3c538ad6a469be29e6d278928930e8a0.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 16 4 2020 11 01 Influence of Cathodic Arc Current on ‎Structure, Mechanical and Tribological ‎Properties of TiC/a-C:H Nano-multilayer ‎Coatings 259 269 47980 EN C. X. Tian ‎School of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, ‎China.‎ Ch. Zou ‎School of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, ‎China.‎ Z. S. Wang ‎School of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, ‎China.‎ B. Yang School of Power & Mechanical Engineering, Wuhan University, 430072 Wuhan, China.‎ D. J. Fu School of Power & Mechanical Engineering, Wuhan University, 430072 Wuhan, China.‎ V. O. Pelenovich Institute of Ion-Plasma and Laser Technologies, Academy of Sciences of Uzbekistan, 700135 ‎Tashkent, Uzbekistan.‎ A. Tolstogouzov Ryazan State Radio Engineering University, Gagarin Str. 59/1, Ryazan, 390005, Russian ‎Federation.‎ Journal Article 2020 05 26 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 ID/IG decreases and the full width at half maximum of G peaks (FWHMG) increases with the increasing of arc current. The content of hydrogen decreases from 26.5 at.% 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 Si3N4 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.

https://www.ijnnonline.net/article_47980_ec36290820b143be1004a1a2df10299b.pdf

Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 16 4 2020 11 01 Investigation of ZnO Nanoparticles on In ‎Vitro Cultures of Coffee (Coffea Arabica ‎L.) ‎ 271 277 47981 EN J. Devasia Plant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., ‎Mysore Karnataka, India.‎ B. Muniswamy Plant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., ‎Mysore Karnataka, India.‎ M. K. Mishra Plant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., ‎Mysore Karnataka, India.‎ Journal Article 2019 04 09 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 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.

https://www.ijnnonline.net/article_47981_44007f34034857cf878ebe2f0fa15e06.pdf