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DOI 10.1515/htmp-2013-0015   High Temp. Mater. Proc. 2014; 33(1): 21 – 25 Shiyong Luo*, Xinlin Zhang, Xiaojun Huang and Wencai Xu Low-Temperature Sintering of Nanosilver Paste on a Gold Film Surface Abstract: Nanosilver paste with a low sintering tempera- ture is a high-demand interconnection material for elec- tronic devices and components due to its superior electri- cal, thermal, and thermomechanical properties, as well as the fact that it is lead free. This study presents a nanoscale silver paste that can be sintered at 300 °C using 60-nm silver

Abstract

Silver nanoparticles are widely used, because of their antimicrobial properties. In this paper, the rate of starch digestion in the presence of nanocatalyst was compared with the rate of reaction without nanosilver. The rate of enzymatic degradation of starch was found to be increased in the presence of silver nanoparticles. It is considered that α-amylase was immobilized onto the surface of nanoparticles.

Abstract

Potato tissue culture is sensitive to ethylene accumulation in the culture vessel. Ag inhibits ethylene action but no information on nanosilver application in potato tissue culture has been published so far. In our study, potato cv. White Desiree was treated with nanosilver (0, 1.0, 1.5, and 2.0 ppm) in vitro. Leaf surface was increased, while stem length and root length decreased. Nanosilver caused also a decrease in the number of isolated protoplasts and in the viability of isolated protoplasts when applied either directly or indirectly.

Microbiol. 2013 39(4):373–83. DOI: 10.3109/1040841X.2012.713323. [16] Zhang H. Application of silver nanoparticles in drinking water purification. Open Access Dissertations, Paper 29. Kingston: University of Rhode Island; 2013. http://digitalcommons.uri.edu/oa_diss/29 . [17] Tugulea AM, Bérubé D, Giddings M, Lemieux F, Hnatiw J, Priem J et al. Nano-silver in drinking water and drinking water sources: Stability and influences on disinfection by-product formation. Environ Sci Pollut Res Int. 2014;21:11823–31. DOI: 10.1007/s11356-014-2508-5. [18] Yang, X. A Study on

S, Tang Y, Vlahovic B. A review on preparation and applications of silver-containing nanofibers. Nanoscale Res Lett . 2016;11:80. 9. Barras F,Aussel L, Ezraty B. Silver and antibiotic, new facts to an old story. Antibiotics 2018;7:79. 10. Likus W, Bajor G, Siemianowicz K. Nanosilver – does it have only one face? Acta Biochim Polon . 2013;60(4):495-501. 11. Panáček A, Kvítek L, Smékalová M, Večeřová R, Kolář M, Röderová M et al. Bacterial resistance to silver nanoparticles and how to overcome it. Nature Nanotechnol . 2018;13:65-71. 12. Randall CP, Gupta A

Abstract

Green synthesized nanoparticles from plant extracts are being used in various biomedical applications, particularly because of their bactericidal and cytotoxic activities. In this study, silver nanoparticles (AgNPs) were successfully synthesized from the Rosmarinus officinalis aqueous leaf extract. Different spectroscopic and microscopic analyses such as ultraviolet-visible (UV-vis) spectroscopy, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy, and energy-dispersive X-ray spectroscopy were performed to verify the biosynthesized AgNPs in our sample. The formation of nanosilver particles was preliminarily confirmed by UV-vis spectroscopy at 400 nm. The presence of carboxylic or amide groups was confirmed by FTIR, for the reduction of the silver ion. Transmission electron microscopy confirmed a particle size of 12–22 nm. The prepared AgNPs showed good antibacterial activity against human pathogens and good cytotoxic activity against the human breast cancer cell line (MDA MB 231). The nanoparticles prepared from R. officinalis can be used for various biomedical applications.

Abstract

The aim of this research was to study the properties of nanohydroxyapatite (nanoHAp) and nanohydroxyapatite, doped with nanosilver (nanoHAp/nanoAg), coatings obtained by an electrophoretic deposition process. The suspensions was prepared by dispersing 0.1 g of HAp nanopowder for nanoHAp coatings and 0.1 g of nanoHAp and 0.025 g nanoAg for nanoHAp/nanoAg coatings. The deposition was carried out for 1 min at 50 V voltage followed by drying at room temperature for 24 h and heating at 800°C for 1 h in vacuum. The thickness of the nanoHAp and nanoHAp/nanoAg coatings was found as of about 5 μm. The corrosion behavior tests made by potentiodynamic methods brought out slightly higher values of corrosion current for nanoHAp coatings and nanoHAp/nanoAg coatings as compared to the reference Ti13Zr13Nb specimen. The nanohardness of the nanoHAp coatings achieved 0.020 ± 0.004 GPa and of the nanoHAp/nanoAg coatings 0.026 ± 0.012 GPa. Nanoscratch test of the nanoHAp and nanoHAp/nanoAg coatings revealed an increased Critical Friction (mN) in the presence of nanosilver particles. The wettability angles decreased for nanoHAp/nanoAg coatings comparing to pure nanoHAp coatings on titanium alloy.

Facile Synthesis and Electrical Conductivity of Carbon Nanotube Reinforced Nanosilver Composite Hemant Pala,d, Vimal Sharmaa, Rajesh Kumarb, and Nagesh Thakurc a Department of Physics, National Institute of Technology, Hamirpur (H.P.) 177005 India b Department of Physics, Jaypee University of Information and Technology, Solan, (H.P.), 173212 India c Department of Physics, Himachal Pradesh University, Shimla (H.P.) 171005, India d Department of Physics, Govt. College Chowari, Chamba (H.P.), 176310, India Reprint requests to H.P.; E-mail: hemantpal76@gmail.com Z

the significant antibacterial activity of different sizes of nanosilver against Gram-positive ( S. aureus ) and Gram-negative bacteria ( S. typhimurium SL1344) by the disc diffusion method using Müeller-Hinton Agar. Silver nanoparticles found to have broad spectrum activity against a variety of Gram-positive and Gram-negative bacteria. Devi and Joshi [149] screened 53 isolates of different fungi isolated from soils of different microhabitats of Eastern Himalayan range for mycosynthesis of silver nanoparticles and also studied their efficacy as antimicrobials alone

Immunity, 50 , 97-101. Liya, G., Weiyong, Y., Zhisong, L., Chang Ming, L. (2013). Polymer/nanosilver composite coatings for antibacterial applications. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 439, 20 , 69-83. Malinowska-Pańczyk, E., Sztuka, K., Kołodziejska, I. (2010). Substancje o działaniu przeciwdrobnoustrojowym jako składniki biodegradowalnych folii z polimerów naturalnych. Polimery, 55, 9 , 627-633. Mroczek-Sosnowska, N., Jaworski, S., Siennicka, A., Gondek, A. (2013). Unikalne właściwości nanocząstek srebra. Polskie Drobiarstwo, 20 , 2