An indium tin oxide electrode modified with gold nanorods for use in potential-controlled surface plasmon resonance studies

Heider, Emily C.; Trieu, Khang; Dı́az, Vı́ctor M.; Chumbimuni‐Torres, Karin Y.; Campiglia, Andrés D.; Duranceau, Steven J.

doi:10.1007/s00604-013-1017-4

Cited by 4 publications

(1 citation statement)

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“…It has three methoxy groups per molecule, which can give rise to a number of surface structures such as three-dimensional self-assembly, multilayers, or an island. This increases the roughness and hydrophobicity of the gold nanoparticles, which decreases the repulsive force between the nanoparticles and leads to their aggregation; this has been shown by studies to enhance the overall biocidal activity of gold nanoparticles . In addition to the higher repellency from 1 H ,1 H ,2 H ,2 H -perfluorodecanethiol, the overall hydrophobicity of gold nanoparticles increases their repellency to pathogens through steric repulsion and electrostatic forces.…”

Section: Resultsmentioning

confidence: 95%

A Bifunctional Spray Coating Reduces Contamination on Surfaces by Repelling and Killing Pathogens

Jarad

Rachwalski

Bayat

et al. 2023

ACS Appl. Mater. Interfaces

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Surface-mediated transmission of pathogens is a major concern with regard to the spread of infectious diseases. Current pathogen prevention methods on surfaces rely on the use of biocides, which aggravate the emergence of antimicrobial resistance and pose harmful health effects. In response, a bifunctional and substrateindependent spray coating is presented herein. The bifunctional coating relies on wrinkled polydimethylsiloxane microparticles, decorated with biocidal gold nanoparticles to induce a "repel and kill" effect against pathogens. Pathogen repellency is provided by the structural hierarchy of the microparticles and their surface chemistry, whereas the kill mechanism is achieved using functionalized gold nanoparticles embedded on the microparticles. Bacterial tests with methicillin-resistant Staphylococcus aureus and Pseudomonas aeruginosa reveal a 99.9% reduction in bacterial load on spraycoated surfaces, while antiviral tests with Phi6�a bacterial virus often used as a surrogate to SARS-CoV-2�demonstrate a 98% reduction in virus load on coated surfaces. The newly developed spray coating is versatile, easily applicable to various surfaces, and effective against various pathogens, making it suitable for reducing surface contamination in frequently touched, heavy traffic, and high-risk surfaces.

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Section: Resultsmentioning

confidence: 95%