Structural and optical characterization and efficacy of hydrothermal synthesized Cu and Ag doped zinc oxide nanoplate bactericides

Abinaya, Chandrasekaran; Marikkannan, M.; Manikandan, M.; Mayandi, J.; Suresh, Palaniswamy; Shanmugaiah, Vellasamy; Ekstrum, Craig; Pearce, Joshua M.

doi:10.1016/j.matchemphys.2016.09.039

Cited by 68 publications

(24 citation statements)

References 67 publications

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“…Previous work had shown dose dependent activity of the nanoparticles on for E. coli (MTTC443) S. aureus (MTCC3160) and S. typhi (MTCC3216) and it was found to be significant even at lowest concentration (25). These early results even compared favorably compared to a com mercial antibiotic used as control (DMSO) (25). The results reported here in Figure 5 and Table 2 show that hydrothermal synthesis of doped and undoped ZnO is effective against grampositive bacte ria (S. epidermis).…”

Section: Bacterial Densitymentioning

confidence: 96%

“…In addition to zinc, both silver and copper have been proposed as an alternative to conventional antimicrobials for some applications (23). Following an open source nanotechnology approach (24) recent work (25) has tested hydrothermal synthesized nanoscale ZnO plates for efficacy as a bactericide for E. coli, S. typhi and S. aureus along with Cu and Ag doped ZnO powders (Cu:ZnO and Ag:ZnO). The materials were well characterized with the effect of doping Cu and Ag on ZnO quantified for the structural and optical properties and the efficacy for killing human bacterial pathogens was promising (25).…”

mentioning

confidence: 99%

“…Following an open source nanotechnology approach (24) recent work (25) has tested hydrothermal synthesized nanoscale ZnO plates for efficacy as a bactericide for E. coli, S. typhi and S. aureus along with Cu and Ag doped ZnO powders (Cu:ZnO and Ag:ZnO). The materials were well characterized with the effect of doping Cu and Ag on ZnO quantified for the structural and optical properties and the efficacy for killing human bacterial pathogens was promising (25). However, it was not clear that the effect was due to ZnO, doped ZnO or simply that the Cu or Ag were the cause for antibacterial effects observed.…”

mentioning

confidence: 99%

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Inhibition of growth ofS. epidermidisby hydrothermally synthesized ZnO nanoplates

Abinaya

Mayandi

Osborne

et al. 2017

Mater. Res. Express

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The antibacterial effect of zinc oxide (ZnO#1) as prepared and annealed (ZnO#2) at 400 o C, Cu doped ZnO (CuZnO), and Ag doped ZnO (AgZnO) nanoplates on Staphylococcus epidermidis was investigated for the inhibition and inactivation of cell growth. The results shows that pure ZnO and doped ZnO samples exhibited antibacterial activity against S. epidermidis as compared to tryptic soy broth (TSB). Also it is observed that S. epidermidis was extremely sensitive to treatment with ZnO nanoplates and it is clear that the effect is not purely depend on Cu/Ag. Phase identification of a crys talline material and unit cell dimensions were studied by Xray powder diffraction (XRD). The scan ning electron microscopy (SEM) provides information on sample's surface topography and the EDX confirms the presence of Zn, O, Cu and Ag. Xray photoelectron spectroscopy (XPS) was used to analyze the elemental composition and electronic state of the elements that exist within the samples. These studies confirms the formation of nanoplates and the presence of Zn, O, Ag, Cu with the oxida tion states +2, 2, 0 and +2 respectively. These results indicates promising antibacterial applications of these ZnObased nanoparticles synthesized with lowcost hydrothermal methods.

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Section: Bacterial Densitymentioning

confidence: 96%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Inhibition of growth ofS. epidermidisby hydrothermally synthesized ZnO nanoplates

Abinaya

Mayandi

Osborne

et al. 2017

Mater. Res. Express

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“…Metallic copper and silver are known for their antibacterial properties. Because of their ability to disturb the bacterial growth, modern studies focus on the exposure of copper and silver to the material infested by bacteria . The release of copper micro and nanoparticles and Cu 2+ ions from cellulose fibers has been investigated by Llorens et al.…”

Section: Applications For Functionalized Cellulosementioning

confidence: 99%

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

Bethke

Palantöken

Andrei

et al. 2018

Adv Funct Materials

215

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As the most abundant natural polymer, cellulose presents a unique advantage for large-scale applications. To fully unlock its potential, the introduction of desired functional groups onto the cellulose backbone is required, which can be realized by either chemical bonding or physical surface interactions. This review gives an overview of the chemistry behind the state-of-the-art functionalization methods (e.g., oxidation, esterification, grafting) for cellulose in its various forms, from nanocrystals to bacterial cellulose. The existing and foreseeable applications of the obtained products are presented in detail, spanning from water purification and antibacterial action, to sensing, energy harvesting, and catalysis. A special emphasis is put on the interactions of functionalized cellulose with heavy metals, focusing on copper as a prime example. For the latter, its toxicity can either have a harmful influence on aquatic life, or it can be conveniently employed for microbial disinfection. The reader is further introduced to recent sensing technologies based on functionalized cellulose, which are becoming crucial for the near future especially with the emergence of the internet of things. By revealing the potential of water filters and conductive clothing for mass implementation, the near future of cellulose-based technologies is also discussed.not suitable for drinking water treatment in rural areas or not applicable on a large scale. Other methods involving materials which have high adsorption capacities for pollutants, for example activated charcoal have been explored. [27,28] Nevertheless, there are no universal adsorbents for all pollutants, meaning that superior alternatives are still required. In recent years, biodegradable adsorbents such as cellulose and chitosan have attracted much attention for the removal of heavy metals.In particular cellulose has a number of advantages, which include high abundance, low cost, easy access, nontoxicity and biodegradability. It is particularly suited for the removal of low concentrations of heavy metals which occur in contaminated ground or tap water. [26] Beyond the aspects of copper removal from water, in this review we indicate how the metal's increased toxicity for microbial life can present an advantage for medical applications. Moreover, we also take a closer look at further applications of functionalized cellulose, including catalysis and sensing, which can make a great impact regarding energy conversion and management. The inclusion of conductive cellulose sensors within the internet of things global network is of particular interest, since an accurate weather forecast can provide swift adjustments in the usage of the often intermittent renewable energy sources. In order to understand what confers functionalized cellulose its versatility for broad applications, we first exemplify the functionalization techniques on a molecular basis.

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“…8, the antibacterial property of ceramic was greatly improved by Ag/ZnO nanocomposite loading, and optimal antibacterial activity was obtained with 5% Ag loading against E.coil. This phenomenal possibility caused by the small crystallite size (due to the mismatch ionic radii of Ag (1.44 Å) and Zn 2+ (0.74 Å)), positive surface charge (due to the negatively charged bacteria) of Ag/ZnO nanocomposite and the photoactivity of ZnO and the plasmonic effect of silver [29].…”

Section: Effect On Antibacterial Propertymentioning

confidence: 99%

Improvement of mechanical properties, microscopic structures, and antibacterial activity by Ag/ZnO nanocomposite powder for glaze-decorated ceramic

Zhang

Guo

2017

J Adv Ceram

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Abstract:With the increase in the international trade of ceramics, improvement in the physical and chemical properties of ceramics has become a market demand in recent years. The addition of nanomaterials in glaze can simultaneously improve the mechanical and corrosion resistance properties of ceramics. In this study, the effect of nano-sized Ag/ZnO in glazed ceramic was investigated considering the hardness, whiteness, and microscopic structures of the products. Results showed that the Ag/ZnO nanocomposite powder significantly affects the performance of glaze. Glaze hardness reached the highest value (96.6 HV) at the low sintering temperature of 1130 ℃ with the addition of 10% Ag/ZnO nanocomposite powder. Furthermore, the Ag/ZnO nanocomposite powder improved crack resistance and whiteness. Ag as AgO and Ag 2 O in the glaze was effective for antibacterial activity of ceramic. In addition, the Ag/ZnO nanocomposite powder could also promote the shrinkage of bubbles in the glaze layer and smooth the glaze. These results indicated that the nanoparticles could act as an active center for melting raw materials, which is crucial for ceramic properties.

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Structural and optical characterization and efficacy of hydrothermal synthesized Cu and Ag doped zinc oxide nanoplate bactericides

Cited by 68 publications

References 67 publications

Inhibition of growth ofS. epidermidisby hydrothermally synthesized ZnO nanoplates

Inhibition of growth ofS. epidermidisby hydrothermally synthesized ZnO nanoplates

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

Improvement of mechanical properties, microscopic structures, and antibacterial activity by Ag/ZnO nanocomposite powder for glaze-decorated ceramic

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