Adatom Extraction from Pristine Metal Terraces by Dissociative Oxygen Adsorption: Combined STM and Density Functional Theory Investigation of 
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Pal, Jagriti; Rawal, Takat B.; Smerieri, Marco; Hong, Sampyo; Alatalo, M.; Savio, Letizia; Vattuone, L.; Rahman, Talat S.; Rocca, M.

doi:10.1103/physrevlett.118.226101

Cited by 12 publications

(4 citation statements)

References 44 publications

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“…Conversely, if cuprous ions are provided instead of cupric ions, they can be transformed into cupric ions by dissolved oxygen and induce the etching of the Ag nanostructures (middle panel of Figures 4b and S6d in the Supporting Information); presumably, the surface oxygen in the form of Ag 2 O could be utilized. 33 The most important chemical species for the Ag etching are chloride ions. The presence of chloride ions subtly detours redox reactions and modifies the reduction potentials, which enables the hitherto forbidden redox pairs of Ag 0 oxidation to Ag + and Cu 2+ reduction to Cu + .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…However, the lack of cupric ions due to the inhibition of the reoxidizing process resulted in insufficient rounding of the Ag nanostructures (Figure S6c in the Supporting Information). Conversely, if cuprous ions are provided instead of cupric ions, they can be transformed into cupric ions by dissolved oxygen and induce the etching of the Ag nanostructures (middle panel of Figures b and S6d in the Supporting Information); presumably, the surface oxygen in the form of Ag 2 O could be utilized …”

Section: Resultsmentioning

confidence: 99%

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Selective Flocculation and H₂O₂-Free Oxidative Etching-Based Synthesis of Highly Monodisperse Ag Nanospheres for Uniform Quantum Dot Photoluminescence-Enhancing Plasmonic Cavity Applications

Jung,

Kim,

Lee

et al. 2024

J. Am. Chem. Soc.

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Ag nanoparticles have garnered significant attention for their excellent plasmonic properties and potential use as plasmonic cavities, primarily because of their intrinsically low ohmic losses and optical properties in the visible range. These are particularly crucial in systems involving quantum dots that absorb light at low wavelengths, where the need for a high threshold energy of interband transitions necessitates the incorporation of Ag nanostructures. However, the synthesis of Ag nanoparticles still encounters challenges in achieving structural uniformity and monodispersity, along with chemical stability, consequentially inducing inconsistent and poorly reliable optical responses. Here, we present a two-step approach for synthesizing highly uniform spherical Ag nanoparticles involving depletion-induced flocculation and Cu(II)-mediated oxidative etching. We found that the selective flocculation of multitwinned Ag nanocrystals significantly enhances the uniformity of the resulting Ag nanostructures, leaving behind only single-crystalline and single-twinned nanostructures. Subsequent oxidative etching, in which cupric ions are directly involved in the reaction, was designed based on Pourbaix diagrams to proceed following thermodynamically favorable states and circumvent the generation of reactive chemical species such as H 2 O 2 . This leads to perfectly spherical shapes of final Ag nanoparticles with a synthetic yield of 99.5% and additionally reduces the overall reaction time. Furthermore, we explore the potential applications of these monodisperse Ag nanospheres as uniform plasmonic cavities. The fabricated Ag nanosphere films uniformly enhanced the photoluminescence of InP/ZnSe/ZnS quantum dots, showcasing their capabilities in exhibiting consistent plasmonic responses across a large area.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Selective Flocculation and H₂O₂-Free Oxidative Etching-Based Synthesis of Highly Monodisperse Ag Nanospheres for Uniform Quantum Dot Photoluminescence-Enhancing Plasmonic Cavity Applications

Jung,

Kim,

Lee

et al. 2024

J. Am. Chem. Soc.

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“…No detailed structures of these clusters have been proposed and the clusters were imaged at 77 K, leading to the clusters appearing streaky or fuzzy in STM images due to the clusters being semi-mobile on the surface. In another related system, it has been demonstrated using low-temperature STM, that oxygen on Ag(110) can produce a variety of features 32,33 . Two of these features contain a linear O-Ag-O structure.…”

Section: Introductionmentioning

confidence: 99%

“…Two of these features contain a linear O-Ag-O structure. One feature is a zigzag chain of -O-Ag-O-Ag-O- aligned along the [1 −1 0] direction 32 . The zigzag chain is composed of silver atoms within a row of the substrate being partially displaced vertically and the oxygen occupying three-fold hollow sites along the substrate rows.…”

Section: Introductionmentioning

confidence: 99%

Identification of an AgS2 Complex on Ag(110)

Spurgeon

Liu

et al. 2019

Sci Rep

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Adsorbed sulfur has been investigated on the Ag(110) surface at two different coverages, 0.02 and 0.25 monolayers. At the lower coverage, only sulfur adatoms are present. At the higher coverage, there are additional bright features which we identify as linear, independent AgS2 complexes. This identification is based upon density functional theory (DFT) and its comparison with experimental observations including bias dependence and separation between complexes. DFT also predicts the absence of AgS2 complexes at low coverage, and the development of AgS2 complexes around a coverage of 0.25 monolayers of sulfur, as is experimentally observed. To our knowledge, this is the first example of an isolated linear sulfur-metal-sulfur complex.

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Crystallography of Metal Surfaces and Adsorbed Layers

Held

2020

Springer Handbook of Surface Science

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Adatom Extraction from Pristine Metal Terraces by Dissociative Oxygen Adsorption: Combined STM and Density Functional Theory Investigation of O/Ag(110)

Cited by 12 publications

References 44 publications

Selective Flocculation and H₂O₂-Free Oxidative Etching-Based Synthesis of Highly Monodisperse Ag Nanospheres for Uniform Quantum Dot Photoluminescence-Enhancing Plasmonic Cavity Applications

Selective Flocculation and H₂O₂-Free Oxidative Etching-Based Synthesis of Highly Monodisperse Ag Nanospheres for Uniform Quantum Dot Photoluminescence-Enhancing Plasmonic Cavity Applications

Identification of an AgS2 Complex on Ag(110)

Crystallography of Metal Surfaces and Adsorbed Layers

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Adatom Extraction from Pristine Metal Terraces by Dissociative Oxygen Adsorption: Combined STM and Density Functional Theory Investigation of O/Ag(110)

Cited by 12 publications

References 44 publications

Selective Flocculation and H2O2-Free Oxidative Etching-Based Synthesis of Highly Monodisperse Ag Nanospheres for Uniform Quantum Dot Photoluminescence-Enhancing Plasmonic Cavity Applications

Selective Flocculation and H2O2-Free Oxidative Etching-Based Synthesis of Highly Monodisperse Ag Nanospheres for Uniform Quantum Dot Photoluminescence-Enhancing Plasmonic Cavity Applications

Identification of an AgS2 Complex on Ag(110)

Crystallography of Metal Surfaces and Adsorbed Layers

Contact Info

Product

Resources

About

Selective Flocculation and H₂O₂-Free Oxidative Etching-Based Synthesis of Highly Monodisperse Ag Nanospheres for Uniform Quantum Dot Photoluminescence-Enhancing Plasmonic Cavity Applications

Selective Flocculation and H₂O₂-Free Oxidative Etching-Based Synthesis of Highly Monodisperse Ag Nanospheres for Uniform Quantum Dot Photoluminescence-Enhancing Plasmonic Cavity Applications