Imprinting of nanoparticles in thin films: Quo Vadis?

Zelikovich, Din; Dery, Linoy; Sagi-Cohen, Hila; Mandler, Daniel

doi:10.1039/d3sc02178e

Cited by 4 publications

(4 citation statements)

References 154 publications

(247 reference statements)

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“…Estimating the AuNPs distribution reveals that the surface density is similar for all systems (with an average of 4.94 ± 1.33 × 10 10 AuNPs cm –2 as calculated from the SEM images in Figure ), the size distribution of the NPs does not change upon adsorption, and no significant aggregation is observed. This is in accordance with our previous work, which thoroughly studied the thermodynamics of AuNPs adsorption. , Hence, the conditions are established to form highly similar surface density arrays of AuNP bearing different ligands.…”

Section: Resultssupporting

confidence: 89%

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The Effect of the Capping Agents of Nanoparticles on Their Redox Potential

Savchenko,

Zelikovich,

Elgavi Sinai

et al. 2024

J. Am. Chem. Soc.

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Engineered metallic nanoparticles, which are found in numerous applications, are usually stabilized by organic ligands influencing their interfacial properties. We found that the ligands affect tremendously the electrochemical peak oxidation potentials of the nanoparticles. In this work, identical gold nanoparticles were ligand-exchanged and carefully analyzed to enable a precise and highly reproducible comparison. The peak potential difference between gold nanoparticles stabilized by various ligands, such as 2and 4-mercaptobenzoic acid, can be as high as 71 mV, which is substantial in energetic terms. A detailed study supported by density functional theory (DFT) calculations aimed to determine the source of this interesting effect. The DFT simulations of the ligand adsorption modes on Au surfaces were used to calculate the redox potentials through the thermodynamic cycle method. The DFT results of the peak potential shift were in good agreement with the experimental results for a few ligands, but showed some discrepancy, which was attributed to kinetic effects. The kinetic rate constant of the oxidation of Au nanoparticles stabilized by 4mercaptobenzoic acid was found to be twice as large as that of the Au nanoparticles stabilized by citrate, as calculated from Laviron's theory and the Tafel equation. Finally, these findings could be applied to some novel applications such as determining the distribution of nanoparticle population in a dispersion as well as monitoring the ligand exchange between nanoparticles.

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Section: Resultssupporting

confidence: 89%

“…This is in accordance with our previous work, which thoroughly studied the thermodynamics of AuNPs adsorption. 29,34 Hence, the conditions are established to form highly similar surface density arrays of AuNP bearing different ligands.…”

Section: Resultsmentioning

confidence: 99%

The Effect of the Capping Agents of Nanoparticles on Their Redox Potential

Savchenko,

Zelikovich,

Elgavi Sinai

et al. 2024

J. Am. Chem. Soc.

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“…19,20 D-μ-SPE procedures has been recently reported for the determination of triazole fungicides in wastewater and fruit juices using respectively carbon nanotubes/metal–organic frameworks, 21 and molecularly imprinted polymers (MIPs). 22–24 The use of a hyperbranched polyester composite as sorbent for D-μ-SPE of benzoylurea insecticides in water samples has been also reported 25 as well as montmorillonite for preconcentration of neonicotinoid insecticides. 26…”

Section: Introductionmentioning

confidence: 94%

“…19,20 D-m-SPE procedures has been recently reported for the determination of triazole fungicides in wastewater and fruit juices using respectively carbon nanotubes/metal-organic frameworks, 21 and molecularly imprinted polymers (MIPs). [22][23][24] The use of a hyperbranched polyester composite as sorbent for D-m-SPE of benzoylurea insecticides in water samples has been also reported 25 as well as montmorillonite for preconcentration of neonicotinoid insecticides. 26 In the present work a sensitive, efficient and high-throughput D-m-SPE sample preparation method was developed and proposed for analysis of viticulture-related fungicide residues by using UHPLC-Q-Orbitrap HRMS, from surface water and wine samples.…”

Section: Introductionmentioning

confidence: 94%