S-Nano Paddle Brush

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22 July 2009

Metropolis Technology

USA

Korea

Health and Fitness

Personal Care

— Silver Nano bristles — Anti-bacterial/fungal properties — Smooth/tighten the shaft’s outer cuticle — Hair becomes more manageable — Creates softer hair — Adds incredible shine

'Not too sure about the nano business....but the brush has a nice weight to it, and a clean look....which is the reason I chose it. So I guess it is what i expected....if the nano stuff actually makes an impression on me, I will update my review. ''

'In this study, we investigated the antimicrobial activity of silver nanoparticles (Ag-NPs) and platinum nanoparticles (Pt-NPs) aqueous solution, which were prepared using different stabilizer, such as sodium dodecylsulfate (SDS) and poly-(N-vinyl-2-pyrrolidone) (PVP), for Staphylococcus aureus (S. aureus) and Escherichia coli (E.coli) by measuring the minimum inhibitory concentration (MIC). Antimicrobial effect of Ag-NPs for S. aureus and E. coli was investigated using cup diffusion method. The growth of Gram-positive (S. aureus) and Gram-negative (E. coli) bacteria were inhibited by Ag-NPs. The MIC of Ag-NPs for S. aureus and E. coli were 5 and 10 ppm, respectively. But the Au-NPs stabilized with SDS did not show antimicrobial activity. Also, the Pt-NPs stabilized with PVP (or SDS) did not show antimicrobial activity for the test organisms.'' Kyung-Hwan Cho, Jong-Eun Park, Tetsuya Osaka, Soo-Gill Park (2005)

'Many important aspects of nanosilver behavior are influenced by the ionic activity associated with the particle suspension, including antibacterial potency, eukaryotic toxicity, environmental release, and particle persistence. The present study synthesizes pure, ion-free, citrate-stabilized nanosilver (nAg) colloids as model systems, and measures their time-dependent release of dissolved silver using centrifugal ultrafiltration and atomic absorption spectroscopy. Ion release is shown to be a cooperative oxidation process requiring both dissolved dioxygen and protons. It produces peroxide intermediates, and proceeds to complete reactive dissolution under some conditions. Ion release rates increase with temperature in the range 0−37 °C, and decrease with increasing pH or addition of humic or fulvic acids. Sea salts have only a minor effect on dissolved silver release. Silver nanoparticle surfaces can adsorb Ag+, so even simple colloids contain three forms of silver: Ag0 solids, free Ag+ or its complexes, and surface-adsorbed Ag+. Both thermodynamic analysis and kinetic measurements indicate that Ag0 nanoparticles will not be persistent in realistic environmental compartments containing dissolved oxygen. An empirical kinetic law is proposed that reproduces the observed effects of dissolution time, pH, humic/fulvic acid content, and temperature observed here in the low range of nanosilver concentration most relevant for the environment.'' Jingyu Liu, Robert H. Hurt (2010)

Silver

Antimicrobial protection

Surface bound particles

Category 4 (Unsupported claim)