ORIGINAL_ARTICLE
Silica Coated Magnetic Nanoparticles for Biological Applications
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_4f77d91c87a06904e6f83aa386901e17.pdf
2020-11-01
209
217
Magnetic nanoparticles
silica coating
biocompatibility
Cytotoxicity.
D.
Chandra Sekhar
chandu1884@gmail.com
1
Department of Engineering Chemistry, SRKR Engineering College, Bhimavaram-534204, India.
AUTHOR
Bhagavathula
Diwakar
bsd2020@gmail.com
2
Department of Engineering Chemistry, SRKR Engineering College, Bhimavaram-534204, India.
AUTHOR
N.
Madhavi
madhavijkcchempg@gmail.com
3
P. G. Department of Chemistry, JKC College, Guntur-522006, India.
LEAD_AUTHOR
Xiaoying, Y., Xiaoyang, Z., Yanfeng, M., Yi, H., Yinsong, W., Yomgsheng, C., “Superparamagnetic graphene oxide–Fe3O4 nanoparticles hybrid for controlled targeted drug carriers”, J, Mater. Chem., 19 (2009) 2710-2714.
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Chella, S., Pratap, K., Sathiyanathan, F., Venugopal, V., Soon, K, J., Andrews, N, G., “CoFe2O4 and NiFe2O4@graphene adsorbents for heavy metal ions – kinetic and thermodynamic analysis”, RSC Adv., 5 (2015) 28965-28972.
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Giri, S., Trewyn, B. G., Stellmaker, M. P. and Lin, V. S. ‐Y., “Stimuli‐Responsive Controlled‐Release Delivery System Based on Mesoporous Silica Nanorods Capped with Magnetic Nanoparticles”, Angewandte chemie International edition, 44 (2005) 5038-5044.
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23
ORIGINAL_ARTICLE
Gum Acacia/Carbopol-Based Biocomposites Loaded with Silver Nnanoparticles as Potential Wound Dressings
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.
https://www.ijnnonline.net/article_47976_5558bddd8cf28a9db362d757fa0b900f.pdf
2020-11-01
219
231
Gum acacia
carbopol
Silver nanoparticles
neem bark extract
Antibacterial activity
Biocomposites.
R.
Lekalakala
rlekalakala@csir.co.za
1
Department of Polymer Technology, Tshwane University of Technology, Pretoria, South Africa.
AUTHOR
B. A.
Aderibigbe
blessingaderibigbe@gmail.com
2
Department of Chemistry, University of Fort Hare, Alice Campus, Alice, South Africa.
LEAD_AUTHOR
S. J.
Owonubi
oshesan@gmail.com
3
Department of Chemistry, University of Zululand, KwaDlangezwa, KwaZulu-Natal, South Africa.
AUTHOR
E. R.
Sadiku
sadikur@tut.ac.za
4
Department of Polymer Technology, Tshwane University of Technology, Pretoria, South Africa.
AUTHOR
Y. T.
Fonkui
thierryfy@uj.ac.za
5
Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Johannesburg, South Africa.
AUTHOR
D. T.
Ndinteh
dndinteh@uj.ac.za
6
Department of Applied Chemistry, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa.
AUTHOR
S. S.
Ray
rsuprakas@csir.co.za
7
Department of Applied Chemistry, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa.
AUTHOR
Sweere, J. M., Van Belleghem, J.D., Ishak, H., Bach, M.S., Popescu, M., Sunkari, V., Kaber, G., Manasherob, R., Suh, G. A., Cao, X., de Vries, C. R., “Bacteriophage trigger antiviral immunity and prevent clearance of bacterial infection”, Science., 363 (2019) 6434-6465.
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70
ORIGINAL_ARTICLE
Improving the Dielectric Properties of the Ba(Zr0.1Ti0.9)O3-based Ceramics by Adding a Li2O–SiO2 Sintering Agent Step by Step
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_eca59cd0abede54f7e6d54aa901ab752.pdf
2020-11-01
233
241
Li-Si-O
Step by step method
dielectric properties
Sintering temperature.
R.
Ma
marong20@126.com
1
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.
LEAD_AUTHOR
B.
Cui
nanochem@163.com
2
Faculty of Chemistry and Materials Science, Northwest University, P.O.Box 710127, Xi’an, People’s Republic of China.
AUTHOR
D.
Hu
fx-cj@163.com
3
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.
AUTHOR
Y.
Wang
515324931@126.com
4
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.
AUTHOR
W.
Zhao
gengts@163.com
5
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.
AUTHOR
M.
Tian
328123460@qq.com
6
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.
AUTHOR
Kishi, H., Mizuno, Y., Chazono, H., “Base-metal electrode-multilayer ceramic capacitors: past, present and future Perspectives”, Jpn. J. Appl. Phys., 42 (2003) 1-15.
1
Kim, Y. K., Jung, Y. G., Sung, T. H., Kim, D. H., Paik, U., “Influence of burnout process on pore structure and burnout microstructure in BaTiO3-based Y5V materials”, J. Mater. Process. Tech., 152 (2004) 276-283.
2
Zhang, X. H., Yue, Z. X., Peng, B., Xie, Z. K., Yuan, L. X., Zhang, J. L., Li, T., “Polarization response and thermally stimulated depolarization current of BaTiO3\r3\r-based Y5V ceramic multilayer capacitors”, J. Am. Ceram. Soc., 97 (2014) 2921-2927.
3
Hao, Y. N., Wang, X. H., Zhang, H., Zhang, Y. C., Li, L. T., “A novel approach to the preparation of a highly crystallized BaTiO3 layer on Ni nanoparticles”, J. Am. Ceram., Soc., 96 (2013) 2696-2698.
4
Jean, J. H., Chang, C. R., “Effect of densification mismatch on camber development during cofiring of nickel-based multilayer ceramic capacitors”, J. Am. Ceram. Soc.,80 (1997) 2401-2406.
5
Kim, S. H., Koh, J. H., “Li-doped (Ba,Sr)TiO3 thick film interdigital capacitors for microwave applications”, Microelectron. Eng.,86 (2009) 59-62.
6
Zhou, L. Q., Jiang, Z. H., Zhang, S. R., “Electrical Properties of Sr0.7Ba0.3TiO3 Ceramics Doped with Nb2O5, 3Li2O∙2SiO2, and Bi2O3”, J. Am. Ceram. Soc., 74 (11) (1991) 2925-2927.
7
Valant, M., Suvorov, D., Pullar, R. C., Sarma, K., Alford, N. M., “A mechanism for low-temperature sintering”, J. Eur. Ceram. Soc., 26 (2006) 2777-2783.
8
Maurya, D., Ahn, C. W., Zhang, S. J., Priya, S., “High dielectric composition in the system Sn-Modified (1-x)BaTiO3-xBa(Cu1/3Nb2/3)O3, x=0.025 for multilayer ceramic capacitors”, J. Am. Ceram. Soc., 93 (2010) 1225-1228.
9
Wang, Y. L., Li, L. T., Qi, J. Q., Gui, Z. L., “The effect of Sm2O3-dopant on the microstructure and dielectric properties of BaZrxTi1-xO3 ceramics”, Ferroelectrics., 262 (2001) 233-238.
10
Wang, Y. L., Li, L. T., Qi, J. Q., Gui, Z. L., “Ferroelectric characteristics of ytterbium-doped barium zirconium titanate ceramics”, Ceram. Int., 28 (2002) 657-661.
11
Wang, Y., Cui, B., Zhang, L. L., Hu, Z. Y., Wang, Y. Y., “Phase composition, microstructure, and dielectric properties of dysprosium-doped Ba(Zr0.1Ti0.9)O3-based Y5V ceramics with high permittivity”, Ceram. Int., 40 (2014) 11681-11688.
12
13.Fan, G. N., Huang, L. X., He, X. G., “Synthesis of singlecrystal BaTiO3 nanoparticles via a one-step sol-precipitation route”, J. Cryst. Growth.,279 (2005) 489-493.
13
Boulos, M., Guillemet-Fritsch, S., Mathieu, F., Durand, B., Lebey, T., Bley, V., “Hydrothermal synthesis of nanosized BaTiO3 powders and dielectric properties of corresponding ceramics”, Solid. State. Ionics., 176 (2005) 1301-1309.
14
Cernea, M., Monnereau, O., Llewellyn, P., Tortet, L., Galassi, C., “Sol-gel synthesis and characterization of Ce doped BaTiO3”, J. Eur. Ceram. Soc., 26 (2006) 3241-3246.
15
Mohammad-Rezaei, R., Razmi, H., “Preparation and characterization of reduced graphene oxide doped in Sol-Gel derived silica for application in electrochemical double-layer capacitors”, Int. J. Nanosci. Nanotechnol., 12 (2016) 233-241.
16
Zhan, X. X., Cui, B., Xing, Y. L., Ma, R., Xie, Y., Chang, Z. G., Zhang F. X., “A novel process to synthesize high-k ‘Y5V’ nano-powder and ceramics”, Ceram. Int., 38 (2012) 389-394.
17
Das, R., Pramanik, P., “Chemical synthesis of fine powder of lead magnesium niobate using niobium tartarate complex”, Mater. Lett., 46 (2000) 7-14.
18
Yamaga, M., Masui, Y., Kodama, N., “Temperature dependence of persistent phosphorescence in Eu2+-doped Ba3SiO5”, Opt. Mater., 36 (2014) 1776-1780.
19
Zajc, I., Drofenik, M., “Preparation of BaTiO3 PTCR ceramics by low temperature liquid sintering”, Key. Eng. Mater., 136 (1997) 1329-1332.
20
Hu, Q., Wang, T., Jin, L., Wei, X. Y., “Dielectric and energy storage properties of barium strontium titanate based glass-ceramics prepared by the sol-gel method”, J. Sol-Gel. Sci. Technol., 71 (2014) 522-529.
21
Qi, J. Q., Li, L. T., Li, W., “The influence of doping style on the grain growth of BaTiO3 ceramics”, Mater. Sci. Eng. B., 99 (2003) 214-216.
22
Cui, X. M., He, Y., Liang, Z. Y., Zhang, H., Zhou, J., “Different microstructure BaO-B2O3-SiO2 glass/ceramic composites depending on hightemperature wetting affinity”, Ceram. Int., 36 (2010) 1473-1478.
23
Liu, C., Zhang, H. W., Su, H., Zhou, T. C., Li, J., Chen, X., Miao, W. Z., Xie, L., Jia, L. J., “Low temperature sintering BBSZ glass modified Li2MgTi3O8 microwave dielectric ceramics”, J. Alloys. Compd., 646 (2015) 1139-1142.
24
Wang, G., Jiang, J., Dou, Z., Zhang, F., Zhang, T., “Sintering behavior and microwave dielectric properties of 0.67CaTiO3-0.33LaAlO3 ceramics modified by B2O3-Li2O-Al2O3 and CeO2”, Ceram. Int., 42 (2016) 11003-11009.
25
Ma, R., Cui, B., Wang, Y. J., Wang, S. Y., Wang, Y. Y., “The energy storage properties of fine-grained Ba0.8Sr0.2Zr0.1Ti0.9O3 ceramics enhanced by MgO and ZnO-B2O3-SiO2 coatings”, Mater. Res. Bull., 111 (2019) 311-319.
26
Zhai, J. W., Yao, X., Cheng, X. G., Zhang, L. Y., Chen, H., “Dielectric properties under dc-bias field of Ba0.6Sr0.4TiO3 with various grain sizes”, Mater. Sci. Eng. B., 94 (2002) 164-169.
27
ORIGINAL_ARTICLE
Botrytis Cinerea, One of the Most Destructive Plant Pathogens, as a Potent to Produce Silver Nanoparticles
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.
https://www.ijnnonline.net/article_47978_6b4080d642b0cc816e09be3fc2037288.pdf
2020-11-01
243
248
Biosynthesis
UV-Vis Spectroscopy
TEM
FTIR.
S.
Mirzaei
smirzaei@basu.ac.ir
1
Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.
LEAD_AUTHOR
A.
Ghabooli
ghabooli67@yahoo.com
2
Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.
AUTHOR
M.
Mirzaei
mirzaei.maysam@gmail.com
3
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran.
AUTHOR
Kyriacou, S., V., Brownlow, W. J., Xu, X. H., “Using nanoparticle optics assay for direct observation of the function of antimicrobial agents in single live bacterial cells”, Biochemistry, 43 (2004) 140–147.
1
Saha, S., Chattopadhyay, D., Acharya, K., “Preparation of silver nanoparticles by bio-reduction using nigrospora oryzae culture filtrate and its antimicrobial activity”, Dig. J. Nanomater. Biostructures, 6 (2011) 1519–1528.
2
Rai, M., Yadav, A., Gade, A., “Silver nanoparticles as a new generation of antimicrobials”, Biotechnol. Adv., 27 (2009) 76–83.
3
Pal, S., Tak, Y. K., Song, J. M., “Does the antibacterial activity of silver nanoparticles depend on the shape of the nanoparticle? A study of the Gram-negative bacterium Escherichia coli”, Appl. Environ. Microbiol., 73 (2007) 1712–1720.
4
Rai, M. K., Deshmukh, S. D., Ingle, A. P., Gade, A. K., “Silver nanoparticles: the powerful nanoweapon against multidrug-resistant bacteria”, J. Appl. Microbiol., 112 (2012) 841–852.
5
Marambio-Jones, C., Hoek, E. V., “A review of the antibacterial effects of silver nanomaterials and potential implications for human health and the environment”, J. Nanopart. Res., 12 (2010) 1531–1551.
6
Velhal, S. G., Kulkarni, S. D., Latpate, R. V., “Fungal mediated silver nanoparticle synthesis using robust experimental design and its application in cotton fabric”, Int. Nano Lett., 6 (2016) 257–264.
7
Naveen, H. K. S., Kumar, G., Karthik, L., Bhaskara Rao, K. V., “Extracellular biosynthesis of silver nanoparticles using the filamentous fungus Penicillium sp.”, Arch. Appl. Sci. Res., 2 (2010) 161–167.
8
Vala, A., Shah, S., “Rapid synthesis of silver nanoparticles by a marine-derived fungus Aspergillus niger and their antimicrobial potentials”, Int. J. Nanosci. Nanotechnol., 8 (2012) 197–206.
9
Sastry, M., Ahmad, A., Khan, M. I., Kumar, R., “Biosynthesis of metal nanoparticles using fungi and actinomycetes”, Cur. Sci., 85 (2003) 162–170.
10
Mandal, D., Bolander, M. E., Mukhopadhyay, D., Sarkar, G., Mukherjee, P., “The use of microorganisms for the formation of metal nanoparticles and their application”, Appl. Microbiol. Biotechnol., 69 (2006) 485–492.
11
Rai, M., Yadav, A., Gade, A., “Mycofabrication, mechanistic aspect and Multifunctionality of Metal Nanoparticles - Where are we? And where should we go?’, in Mendez-Vilas, A. (ed.) Current Research, Technology and Education Topics in Applied Microbiology and Microbial Biotechnology. Badajoz, Spain: Formatex Research Center, (2010) pp. 1343–1354.
12
Sriramulu, M., Sumathi, S., “A mini review on fungal based synthesis of silver nanoparticles and their antimicrobial activity”, Int. J. Chem.Tech. Res., 10 (2017) 367–377.
13
Jarvis, W. R., “Botryotinia and Botrytis species: taxonomy, physiology and pathogenicity-A guide to the literature”, Agriculture Canada, (1977).
14
van Kan, J. A. L., “Licensed to kill: the lifestyle of a necrotrophic plant pathogen”, Trends Plant Sci., 11 (2006) 247–253.
15
Bhainsa, K. C., D’Souza, S. F., “Extracellular biosynthesis of silver nanoparticles using the fungus Aspergillus fumigatus”, Colloids Surf. B Biointerfaces, 47 (2006) 160–164.
16
Ahmad, A., Mukherjee, P., Senapati, S., Mandal, D., Khan, M. I. I., Kumar, R., Sastry, M., “Extracellular biosynthesis of silver nanoparticles using the fungus Fusarium oxysporum”, Colloids Surf. B Biointerfaces, 28 (2003) 313–318.
17
Natarajan, K., Selvaraj, S., Murty, V. R., “Microbial production of silver nanoparticles”, Dig. J. Nanomater. Biostructures, 5 (2010) 135–140.
18
Li, G., He, D., Qian, Y., Guan, B., Gao, S., Cui, Y., Yokoyama, K., Wang, L., “Fungus-mediated green synthesis of silver nanoparticles using Aspergillus terreus”, Int. J. Mol. Sci., 13 (2012) 466–476.
19
Mukherji, S., Bharti, S., Shukla, G., Mukherji, S., “Synthesis and characterization of size- and shape-controlled silver nanoparticles”, Phys. Sci. Rev., 4 (2018) 1–73.
20
Radhi, M. M., Moosa, A. A., Khalaf, I. A., “Performance Improvement of Working Electrode Using Grafted Polymer Modified with SiO2 Nanoparticles”, Nano Biomed. Eng., 10 (2018) 156-164
21
Ghaseminezhad, S. M., Hamedi, S., Shojaosadati, S. A., “Green synthesis of silver nanoparticles by a novel method: Comparative study of their properties”, Carbohydr. Polym., 89 (2012) 467–472.
22
Gole, A., Dash, C., Ramakrishnan, V., Sainkar, S. R. , Mandale, A. B., Rao, M., Sastry, M., “Pepsin−Gold Colloid Conjugates: Preparation, Characterization, and Enzymatic Activity”, Langmuir, 17 (2001) 1674–1679.
23
Mohanpuria, P., Rana, N. K., Yadav, S. K., “Biosynthesis of nanoparticles: technological concepts and future applications”, J. Nanoparticle Res., 10 (2008) 507–517.
24
ORIGINAL_ARTICLE
A Novel Needle-Less Multi-Pin-Electrospinning Method to Fabricate Nanofibers from Dilute PAN Solution
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_4ec93c11f2f63db196cf1981d7dd4045.pdf
2020-11-01
249
258
Needle-less electrospinning
Multi-pin
Dilute solution
Thin nanofibers
Polyacrylonitrile.
G.
Moradi
gls.moradi@gmail.com
1
Department of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran.
AUTHOR
L.
Rajabi
laleh.rajabii@gmail.com
2
Department of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran.
LEAD_AUTHOR
F.
Dabirian
f.dabirian@razi.ac.ir
3
Department of materials and textile Engineering, College of Engineering, Razi University, Kermanshah, Iran.
AUTHOR
M.
Babaei
m.babaei446@gmail.com
4
Department of Polymer Research, Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran.
AUTHOR
Fang, J., Niu, H., Lin, T., Wang, X., “Applications of electrospun nanofibers”, Chinese Sci. Bull., 53 (2008) 2265-2286.
1
Silver, F.H., Christiansen, D.L., Snowhill, P.B., Chen, Y., “Transition from viscous to elastic‐based dependency of mechanical properties of self‐assembled type I collagen fibers”, J. Appl. Polym. Sci., 79 (2001) 134-142.
2
Huang, Z.-M., Zhang, Y.-Z., Kotaki, M., Ramakrishna, S., “A review on polymer nanofibers by electrospinning and their applications in nanocomposites. Composites science and technology”, Compos. Sci. Technol., 63 (2003) 2223-53.
3
An, M., Xu, H., Lv, Y., Gu, Q., Wang, Z., “Structural difference of gel-spun ultra-high molecular weight polyethylene fibers affected by cold drawing process”, Fiber. Polym., 18 (2017) 549-554.
4
Martin, C.R., “Membrane-based synthesis of nanomaterials”, Chem. Mater., 8 (1996) 1739-1746.
5
Dabirian, F., Ravandi, S.H., Pishevar, A., Abuzade, R., “A comparative study of jet formation and nanofiber alignment in electrospinning and electrocentrifugal spinning systems”, J. Electrostat., 69 (2011) 540-546.
6
Kermanshahi, A.J., Rajabi, L., Dabirian, F., “A solvent degradation approach to expose nanoparticles by decreasing nanofibers' diameter”, Polym. Degrad. Stabil., 138 (2017) 126-132.
7
Zhang, P., Wang, Q., Zhang, J., Li, G., Wei, Q., “Preparation of amidoxime-modified polyacrylonitrile nanofibers immobilized with laccase for dye degradation”, Fiber. Polym., 15 (2014) 30-34.
8
Jayaraman, K., Kotaki, M., Zhang, Y., Mo, X., Ramakrishna, S., “Recent advances in polymer nanofibers”, J. Nanosci. Nanotechnol., 4 (2004) 52-65.
9
Ding, B., Kimura, E., Sato, T., Fujita, S., Shiratori, S., “Fabrication of blend biodegradable nanofibrous nonwoven mats via multi-jet electrospinning”, Polymer, 45 (2004) 1895-19-02.
10
Wang, X., Niu, H., Lin, T., Wang, X., “Needleless electrospinning of nanofibers with a conical wire coil”, Polym. Eng. Sci., 49 (2009) 1582-1586.
11
Jirsak, O., Sanetrnik, F., Lukas, D., Kotek, V., Martinova, L., Chaloupek, J., “Method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method”, Google Patents, (2009)..
12
Petrik, S., Maly, M., “Production nozzle-less electrospinning nanofiber technology, in: MRS Proceedings”, Cambridge Univ Press, (2009) 79-90.
13
Yarin, A., Zussman, E., “Upward needleless electrospinning of multiple nanofibers”, Polymer, 45 (2004) 2977-2980.
14
Niu, H., Lin, T., Wang, X., “A comparison of cylinder and disk nozzles”, J. Appl. Polym. Sci., 114 (2009) 3524-3530.
15
Liu, Z., Chen, R., He, J., “Active generation of multiple jets for producing nanofibres with high quality and high throughput”, Mater. Design, 94 (2016) 496-501.
16
Bergshoef, M.M., Vancso, G.J., “Transparent nanocomposites with ultrathin, electrospun nylon‐4, 6 fiber reinforcement”, Adv. Mater., 11 (1999) 1362-1365.
17
Xu, C., Yang, F., Wang, S., Ramakrishna, S., “In vitro study of human vascular endothelial cell function on materials with various surface roughness”, J. Biomed. Mater. Res. A, 71 (2004) 154-161.
18
Derch, R., Greiner, A., Wendorff, J., “Dekker encyclopedia of nanoscience and nanotechnology”, CRC, New York, (2004).
19
Mit‐uppatham, C., Nithitanakul, M., Supaphol, P., “Ultrafine electrospun polyamide‐6 fibers: effect of solution conditions on morphology and average fiber diameter”, Macromol. Chem. Phys., 205 (2004) 2327-2338.
20
Baumgarten, P.K., “Electrostatic spinning of acrylic microfibers”, J. Colloid. Interface. Sci., 36 (1971) 71-79.
21
Moradipour, P., Dabirian, F., Rajabi, L., Derakhshan, A.A., “Fabrication and characterization of new bulky layer mixed metal oxide ceramic nanofibers through two nozzle electrospinning method”, Ceram. Int., 42 (2016) 13449-13458.
22
Cengiz-Çalliolu, F., Jirsak, O., Dayik, M., “Electric current in polymer solution jet and spinnability in the needleless electrospinning process”, Fiber. Polym., 13 (2012) 1266-1271.
23
Kenawy, E.-R., Layman, J.M., Watkins, J.R., Bowlin, G.L., Matthews, J.A., Simpson, D.G., Wnek, G.E., “Electrospinning of poly (ethylene-co-vinyl alcohol) fibers”, Biomaterials, 24 (2003) 907-913.
24
Jalili, R., Morshed, M., Ravandi, S.A.H., “Fundamental parameters affecting electrospinning of PAN nanofibers as uniaxially aligned fibers”, J. Appl. Polym. Sci., 101 (2006) 4350-4357.
25
Schoenmaker, B. De, Schueren, L. Van der, Ceylan, Ö., Clerck, K. De, “Electrospun polyamide 4.6 nanofibrous nonwovens: parameter study and characterization”, J. Nanomater., 2012 (2012) 14.
26
Miyoshi, T., Toyohara, K., Minematsu, H., “Preparation of ultrafine fibrous zein membranes via electrospinning”, Polym. Int., 54 (2005) 1187-1190.
27
Mo, X., Xu, C., Kotaki, M., Ramakrishna, S., “Electrospun P (LLA-CL) nanofiber: a biomimetic extracellular matrix for smooth muscle cell and endothelial cell proliferation”, Biomaterials, 25 (2004) 1883-1890.
28
Deitzel, J.M., Kleinmeyer, J., Harris, D., Tan, N.B., “The effect of processing variables on the morphology of electrospun nanofibers and textiles”, Polymer, 42 (2001) 261-272.
29
Gu, S., Ren, J., Vancso, G., “Process optimization and empirical modeling for electrospun polyacrylonitrile (PAN) nanofiber precursor of carbon nanofibers”, Eur. Polym. J., 41 (2005) 2559-2568.
30
Ramakrishna, S., “An introduction to electrospinning and nanofibers”, World Scientific, (2005).
31
Doustgani, A., Vasheghani-Farahani, E., Soleimani, M., Hashemi-Najafabadi, S., “Preparation and characterization of aligned and random nanofibrous nanocomposite scaffolds of poly (vinyl alcohol), poly (e-Caprolactone) and nanohydroxyapatite”, Int. J. Nanosci. Nanotechnol, 7 (2011) 127-132.
32
Qin, X.H., Yang, E.L., Li, N., Wang, S.Y., “Effect of different salts on electrospinning of polyacrylonitrile (PAN) polymer solution”, J. Appl. Polym. Sci., 103 (2018) 3865-3870.
33
He, C.H., Liu, P., Liu, H.Y., “Effect of concentration of metal inorganic salt on fiber diameter in electrospinning process: mathematical model and experimental verification”, Therm. Sci., 22 (2018) 2565-2570.
34
ORIGINAL_ARTICLE
Influence of Cathodic Arc Current on Structure, Mechanical and Tribological Properties of TiC/a-C:H Nano-multilayer Coatings
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_2c2bf0d66ccc73a10ed69abf56507279.pdf
2020-11-01
259
269
TiC/a-C:H
Nano-multilayer coatings
Microstructure
Mechanical properties
Cathodic arc ion plating.
C. X.
Tian
cxtian@lingnan.edu.cn
1
School of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, China.
AUTHOR
Ch.
Zou
cxtian@whu.edu.cn
2
School of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, China.
LEAD_AUTHOR
Z. S.
Wang
zswang@lingnan.edu.cn
3
School of Physics Science & Technology, Lingnan Normal University, Zhanjiang 524048, China.
AUTHOR
B.
Yang
byang@whu.edu.cn
4
School of Power & Mechanical Engineering, Wuhan University, 430072 Wuhan, China.
AUTHOR
D. J.
Fu
djfu@whu.edu.cn
5
School of Power & Mechanical Engineering, Wuhan University, 430072 Wuhan, China.
AUTHOR
V. O.
Pelenovich
pelenovich@yahoo.com
6
Institute of Ion-Plasma and Laser Technologies, Academy of Sciences of Uzbekistan, 700135 Tashkent, Uzbekistan.
AUTHOR
A.
Tolstogouzov
cxtian@wuhan.edu.cn
7
Ryazan State Radio Engineering University, Gagarin Str. 59/1, Ryazan, 390005, Russian Federation.
AUTHOR
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54
ORIGINAL_ARTICLE
Investigation of ZnO Nanoparticles on In Vitro Cultures of Coffee (Coffea Arabica L.)
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_75f4eb2f559670d0c8bc469675302389.pdf
2020-11-01
271
277
nanoparticles
hybrid line
In vitro culture
Contamination
ZnO-NPs
Enhanced recovery.
J.
Devasia
jeena.devasia@gmail.com
1
Plant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., Mysore Karnataka, India.
AUTHOR
B.
Muniswamy
bmswamy@yahoo.com
2
Plant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., Mysore Karnataka, India.
AUTHOR
M. K.
Mishra
manojmishra.m@gmail.com
3
Plant Tissue Culture and Biotechnology Division, Coffee Board, Manasagangothri P. O., Mysore Karnataka, India.
LEAD_AUTHOR
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