A demonstration of the antimicrobial effectiveness of various copper surfaces

Champagne, Victor K.; Helfritch, D.J.

doi:10.1186/1754-1611-7-8

Cited by 82 publications

(58 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Regarding the antimicrobial behaviour, the performance of Cu is reported to be attributed to the release of Cu + and Cu ++ ions, which is favoured by the presence of ion diffusion paths, such as grain boundaries, dislocations, etc [16]. The lack of grain boundaries and dislocations in amorphous materials does not make them good candidate antimicrobial materials.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Antimicrobial and wear performance of Cu-Zr-Al metallic glass composites

et al. 2017

View full text Add to dashboard Cite

The antimicrobial and wear behaviour of metallic glass composites corresponding to the Cu 50+x (Zr 44 Al 6 ) 50-x system with x=(0, 3 and 6) has been studied. The three compositions consist of crystalline phases embedded in an amorphous matrix and they exhibit crystallinity increase with increasing Cu content, i.e., decrease of the glass-forming ability. The wear resistance also increases with the addition of Cu as indirectly assessed from H/E r and H

show abstract

Section: Accepted Manuscriptmentioning

confidence: 99%

Antimicrobial and wear performance of Cu-Zr-Al metallic glass composites

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Fe is the key component of stainless steel. Cu has been shown to inhibit growth of bacteria (Champagne and Helfritch, 2013). Ag has long been known for its antibacterial properties (Skovager et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The effect of surface properties of polycrystalline, single phase metal coatings on bacterial retention

Whitehead

Olivier

Benson

et al. 2015

International Journal of Food Microbiology

View full text Add to dashboard Cite

In the food industry microbial contamination of surfaces can result in product spoilage which may lead to potential health problems of the consumer. Surface properties can have a substantial effect on microbial retention. The surface characteristics of chemically different coatings (Cu, Ti, Mo, Ag, Fe) were defined using white light profilometry (micro-topography and surface features), atomic force microscopy (nano-topography) and physicochemical measurements. The Ag coating had the greatest topography measurements and Fe and Mo the least. Mo was the most hydrophobic coating (lowest γAB,γ(+), γ(-)) whilst Ag was the most hydrophilic (greatest γAB,γ(+), γ(-)). The physicochemical results for the Fe, Ti and Cu coatings were found to lie between those of the Ag and Mo coatings. Microbiological retention assays were carried out using Listeria monocytogenes, Escherichia coli and Staphylococcus aureus in order to determine how surface properties influenced microbial retention. It was found that surface chemistry had an effect on microbial retention, whereas the shape of the surface features and nano-topography did not. L. monocytogenes and S. aureus retention to the surfaces were mostly affected by surface micro-topography, whereas retention of E. coli to the coatings was mostly affected by the coating physicochemistry. There was no trend observed between the bacterial cell surface physicochemistry and the coating physicochemistry. This work highlights that different surface properties may be linked to factors affecting microbial retention hence, the use of surface chemistry, topography or physicochemical factors alone to describe microbial retention to a surface is no longer adequate. Moreover, the effects of surface parameters on microbial retention should be considered individually for each bacterial genus.

show abstract

“…Copper was selected in this study not only because it is prone to reduction upon application of a relatively low DC fi eld but also because of its specifi c properties that raise many expectations in terms of practical applications. Indeed, the surfaces of copper and its alloys, are antimicrobial, [ 10 ] bactericidal, [ 11 ] and possess antifouling properties. [ 12 ] Moreover, the conductive substrate ITO was shown to allow attachment of micro-organisms such as bacteria using electric fi elds.…”

Section: Introductionmentioning

confidence: 99%

Double‐Emulsion Globules as a Tool to Produce 2D Patterned Metal Deposits Using Electro‐Colloidal Lithography

Faure

Leal-Calderón

Saadaoui

2014

Adv Materials Inter

View full text Add to dashboard Cite

micro-particles used to stabilize the emulsion translate to either the poles or the equator of the drops, depending on the relative dielectric constants of the particles, on the surrounding fl uid and on the fl uid within the drop. Such motions break the particle barrier, thus allowing the drops to merge and therefore the emulsion to be destabilized. In a different approach, Dommersnes et al. [ 4 ] demonstrated that AC fi elds could also induce the organization of colloidal particles (metallic, clays or polymers) in "equatorial" ribbons and "longitudinal" dipolar chains at the surface of silicone drops dispersed in castor oil.Oil-in-water emulsions (O/W) under electric fi eld were disregarded until recently since it is diffi cult to destabilize them electrically because of the high conductivity of the continuous phase: the current densities required to induce signifi cant chain formation are much larger compared to those required for W/O emulsions. Vigo and Ristenpart [ 5 ] recently developed a lowvoltage technique for separating stable O/W emulsions. They were able to induce lateral aggregation and further coalescence of the oil droplets by applying a transversal AC electric fi eld, thus proving that the aggregation behavior is strongly reminiscent of that observed under similar electric fi eld conditions for rigid colloids. [ 6 ] In the same vein, here we provide evidence that double-emulsion globules (W/O/W) behave exactly like solid colloidal particles, and that they can self-assemble into planar close-packed or non-close packed hexagonal crystals. Moreover, we take advantage of this property to produce patterned micro-structures using a process we recently developed, called electro-colloidal lithography. [ 7 ] Like conventional colloidal lithography, electro-colloidal lithography relies on the fabrication of a colloidal mask. In colloidal lithography, surface patterning combines colloidal crystal formation with other techniques such as etching, imprinting or electrochemical deposition of a metal salt. [ 8 ] The added-value of electro-colloidal lithography lies in its simplicity since both the colloidal mask and the patterned surface are generated by the application of electric fi elds. The process begins with the arrangement of polystyrene micro-beads into close-packed hexagonal crystals (hpc) or in non-close packed hexagonal crystals (hnpc) using an AC electric fi eld. After fi xing 2D-microbeads crystals onto the electrode surface, a second population of colloidal particles is introduced; either these particles A technique developed to self assemble solid colloidal particles under a sinusoidal electric fi eld (AC fi eld) is adapted to soft W/O/W double-emulsion globules, and is exploited for surface patterning. Double-emulsions containing cupric ions are prepared, placed between two planar ITO electrodes and submitted to a transversal AC fi eld which induced their ordering into hexagonal 2D-arrays. The characteristic spacing is monitored by varying the globule volume fraction. Such self-assembly is used...

show abstract

A demonstration of the antimicrobial effectiveness of various copper surfaces

Cited by 82 publications

References 15 publications

Antimicrobial and wear performance of Cu-Zr-Al metallic glass composites

Antimicrobial and wear performance of Cu-Zr-Al metallic glass composites

The effect of surface properties of polycrystalline, single phase metal coatings on bacterial retention

Double‐Emulsion Globules as a Tool to Produce 2D Patterned Metal Deposits Using Electro‐Colloidal Lithography

Contact Info

Product

Resources

About