Chronoamperometric-based detection of hydrogen peroxide using palladium nanoparticles

Baccar, Hamdi; Adams, Clara P.; Abdelghani, Adnane; Obare, Sherine O.

doi:10.1504/ijnt.2013.053525

Cited by 7 publications

(6 citation statements)

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“…[51] Palladium has been used as a catalyst to manufacture pharmaceuticals, [39] degrade harmful environmental pollutants, [52] and as sensors for the detection of various analytes. [53] – [56] Additionally, Pd and Pd 2+ ions also play a fundamental role in several biotechnological processes. [56] For example, Baccar et al developed a non-enzymatic biosensor using various sizes of Pd NPs to detect hydrogen peroxide in milk.…”

Section: Introductionmentioning

confidence: 99%

“… [53] – [56] Additionally, Pd and Pd 2+ ions also play a fundamental role in several biotechnological processes. [56] For example, Baccar et al developed a non-enzymatic biosensor using various sizes of Pd NPs to detect hydrogen peroxide in milk. [56] While the uses of Pd are extensive, advances are yet to be uncovered as the metals are reduced to the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

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Size-Dependent Antimicrobial Effects of Novel Palladium Nanoparticles

et al. 2014

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Investigating the interactions between nanoscale materials and microorganisms is crucial to provide a comprehensive, proactive understanding of nanomaterial toxicity and explore the potential for novel applications. It is well known that nanomaterial behavior is governed by the size and composition of the particles, though the effects of small differences in size toward biological cells have not been well investigated. Palladium nanoparticles (Pd NPs) have gained significant interest as catalysts for important carbon-carbon and carbon-heteroatom reactions and are increasingly used in the chemical industry, however, few other applications of Pd NPs have been investigated. In the present study, we examined the antimicrobial capacity of Pd NPs, which provides both an indication of their usefulness as target antimicrobial compounds, as well as their potency as potential environmental pollutants. We synthesized Pd NPs of three different well-constrained sizes, 2.0±0.1 nm, 2.5±0.2 nm and 3.1±0.2 nm. We examined the inhibitory effects of the Pd NPs and Pd2+ ions toward gram negative Escherichia coli (E. coli) and gram positive Staphylococcus aureus (S. aureus) bacterial cultures throughout a 24 hour period. Inhibitory growth effects of six concentrations of Pd NPs and Pd2+ ions (2.5×10−4, 10−5, 10−6, 10−7, 10−8, and 10−9 M) were examined. Our results indicate that Pd NPs are generally much more inhibitory toward S. aureus than toward E. coli, though all sizes are toxic at ≥10−5 M to both organisms. We observed a significant difference in size-dependence of antimicrobial activity, which differed based on the microorganism tested. Our work shows that Pd NPs are highly antimicrobial, and that fine-scale (<1 nm) differences in size can alter antimicrobial activity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Size-Dependent Antimicrobial Effects of Novel Palladium Nanoparticles

et al. 2014

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“…The strategy adopted in this work is highlighted in Previously, silver, gold and platinum have been validated as favorable metals in the detection of H2O2 [4][5][6][7]. However, palladium is emerging as a superior choice of metal due to the comparable low cost, robustness and superior electron transfer characteristics [11][12][13][14][15][16][17][18][19]. While the application of Pd to electrode designs for H2O2 sensing is ever growing, it has long been recognized that the size, shape and structure of metallic nanoparticles will affect electrocatalytic performance [18].…”

Section: Introductionmentioning

confidence: 99%

“…While the application of Pd to electrode designs for H2O2 sensing is ever growing, it has long been recognized that the size, shape and structure of metallic nanoparticles will affect electrocatalytic performance [18]. Thus, it was anticipated that the large surface area to volume ratio of metallic nanoparticles would amplify sensitivity during electrochemical analyses [19].…”

Section: Introductionmentioning

confidence: 99%

Composite Microneedle Arrays Modified With Palladium Nanoclusters for Electrocatalytic Detection of Peroxide

et al. 2019

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The fabrication of conductive composite microneedle (MN) patches modified with palladium clusters for the electrocatalytic detection of peroxide is described. Micro molding techniques are utilized in which carbon nanoparticles are bound within a polystyrene matrix resulting in the production of a 10x10 array of needles of length 700 micron. Electrochemical anodization of the carbon particles increases the interfacial carboxyl group population which facilitates the capture of Pd2+ ions. Their subsequent electroreduction yields a catalytic interface with a high sensitivity towards the electroreduction of peroxide (-0.3 V : 49.7+/-2.8 A mM-1 cm-2 ;-0.5 V: 102.1+/-2.32 A mM-1 cm-2). The microneedle sensing system and the various modification stages has been characterized using mechanical testing (fracture testing), cyclic voltammetry and high resolution x-ray photoelectron spectroscopy.

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“…Recentemente, muita atenção tem sido dada à preparação de nanopartículas de Pd para aplicação nas áreas de catálise [208,[210][211], armazenamento de hidrogênio [212][213], e sensores químicos [214][215].…”

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Uso de eletrodos de cobre e eletrodos modificados como sensores eletroquímicos

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Chronoamperometric-based detection of hydrogen peroxide using palladium nanoparticles

Cited by 7 publications

References 37 publications

Size-Dependent Antimicrobial Effects of Novel Palladium Nanoparticles

Size-Dependent Antimicrobial Effects of Novel Palladium Nanoparticles

Composite Microneedle Arrays Modified With Palladium Nanoclusters for Electrocatalytic Detection of Peroxide

Uso de eletrodos de cobre e eletrodos modificados como sensores eletroquímicos

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