Fluoride ions at the Cu–fluoropolymer interface

Naujokas, A.; Abreu, D. G.; Takacs, G. A.; Debies, T.; Mehan, Michael; Entenberg, A.

doi:10.1002/sia.5225

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…The increasing intensity of the shoulder transforms into the second peak, similar to the F-Cu peak of the F 1s spectrum of submonolayer coverage, but with a notably higher binding energy value (684.0 eV instead of 683.0 eV in the submonolayer case). The similar binding energy value 684.0 eV has been observed for thin copper films adsorbed on fluoropolymers and is typical for the F 1s core level in alkali fluorides . The higher binding energy value of F-Cu bonds in comparison with the submonolayer coverage indicates a higher level of copper atom fluorination.…”

Section: Resultssupporting

confidence: 79%

Fluorination of Cu(001) Surface by C₆₀F₄₈ Molecule Adsorption

et al. 2019

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Copper surface functionalization by defluorination of C60F48 molecules with submonolayer and monolayer coverages on the Cu(001) crystal is studied by X-ray photoelectron spectroscopy. At room temperature, fluorinated fullerene molecules on the copper surface start to lose fluorine atoms immediately after adsorption. C 1s level spectra indicate a significant decrease of C-F bonds in the fullerene frame for submonolayer coverage and a gradual fluorine loss with time for monolayer coverage. The energy position of the C-F peak in the C 1s spectrum is a function of the current fluorine content in the molecule during decomposition. The fluorine 1s spectrum on the copper surface has two peaks characterizing F-C bonds with a fullerene cage and F-Cu bonds at lower binding energy. The energy positions of both peaks depend on the fluorine content on the fullerene cage and the copper surface. The Cu 2p spectra for submonolayer coverage show only minor changes. In the meantime, the Cu 2p line after monolayer adsorption has additional features of copper difluoride. The combined F 1s, C 1s, and Cu 2p spectra analysis elucidates a process of fluorine loss with subsequent fluorination of the copper surface from the fluorine surface superstructure to thin copper fluoride film depending on the molecule coverage.

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Section: Resultssupporting

confidence: 79%

Fluorination of Cu(001) Surface by C₆₀F₄₈ Molecule Adsorption

et al. 2019

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“…The disappearance of the peak at ∼687 eV indicates defluorination of the semi-ionic C−F bond from the basal plane at 24 h reaction. The peak at 689 eV is associated with the covalent C−F bond, 14 and the peak at 684 eV is attributed to the fluoride ion 44 originated from the defluorination of FGO 1h . The C 1s XPS spectra of GO, FGO 1h , and FGO 24h are shown in Figure S6a−c, respectively.…”

Section: Characterization Of Go Fgo 1h and Fgo 24hmentioning

confidence: 99%

Role of C–F Bonding on the Optical Properties of Fluorinated Graphene Oxide

Mukherjee,

Bhagat,

Thottappali

et al. 2024

J. Phys. Chem. C

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Graphene oxide (GO) exhibits very poor photoluminescence (PL) characteristics because of the nonradiative recombination of electron−hole pairs. One of the crucial approaches for the enhancement of the optical features of GO is functionalization. In this study, we present a novel catalyst-free, rapid, one-step, aqueous-phase synthetic approach using SELECTFLUOR under mild conditions that provide access to highly photoluminescent fluorinated graphene oxide (FGO) emitting in the visible region. Time-resolved fluorescence spectroscopy and femtosecond transient absorption spectroscopy revealed that the enhanced PL is due to the increased π* → π transition and weaker electron−phonon interactions in FGO. Most importantly, the structure and composition analyses using 19 F NMR and X-ray photoelectron spectroscopy suggest that the C−F bond on the basal plane neighboring to the aromatic rings is the key factor behind the enhancement of the fluorescence of FGO. Identification of the underlying C−F bonding features behind the emergence of strong orange fluorescence will contribute immensely to the fundamental understanding of the structure and optical property relationship of FGO. Moreover, strong orange fluorescence remains stable in a solid thin film of FGO, which offers a unique solution-processable route toward the integration of FGO in solid-state optoelectronic devices.

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“…The patterning of metal nanoparticles on polymer substrates has been of great interest over the past decade because polymer substrates are lightweight, flexible, and lower in cost. − Thus, a variety of synthetic polymers have been extensively explored as substrates for patterns of metal nanoparticles. − Among these polymers, fluoropolymers such as poly(tetrafluoroethylene- co -perfluorovinyl ether) (PFA), poly(tetrafluoroethylene) (PTFE), poly(tetrafluoroethylene- co -hexafluoropropylene) (FEP), and poly(vinylidene fluoride) (PVDF), have been considered suitable for metal patterning due to their high thermal stability, superior electric insulation, and excellent chemical resistance. − However, the use of these fluoropolymers has been limited in such applications due to their much lower surface energy in comparison to other synthetic polymers. Therefore, fluoropolymers should be subjected to surface modification for such applications.…”

Section: Introductionmentioning

confidence: 99%

Patterning of Gold Nanoparticles on Fluoropolymer Films by Using Patterned Surface Grafting and Layer-by-Layer Deposition Techniques

Jung

Hwang

Jung

et al. 2013

ACS Appl. Mater. Interfaces

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The patterning of gold nanoparticles (GNPs) on the surface of a fluoropolymer substrate by using patterned surface grafting and layer-by-layer deposition techniques is described. The surface of a poly(tetrafluoroethylene-co-perfluorovinyl ether) (PFA) substrate was selectively implanted with 150 keV proton ions. Peroxide groups were successfully formed on the implanted PFA surface, and their concentration depended on the fluence. Acrylic acid was graft polymerized onto the implanted regions of the PFA substrate, resulting in well-defined patterns of poly(acrylic acid) (PAA) on the PFA substrate. The surface properties of the PAA-patterned PFA surface, such as chemical compositions, wettability, and morphology, were investigated. The surface analysis results revealed that PAA was definitely present on the implanted regions of the PFA surface, and the degree of grafting was dependent on three factors: fluence, grafting time, and monomer concentration. Furthermore, GNP patterns were generated on the prepared PAA-patterned PFA surface by layer-by-layer deposition of GNPs and poly(diallyldimethyl ammonium chloride). The multilayers of GNPs were deposited only onto the PAA-grafted regions separated by bare PFA regions, and the resulting GNP patterns exhibited good electrical conductivity.

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Fluoride ions at the Cu–fluoropolymer interface

Cited by 5 publications

References 27 publications

Fluorination of Cu(001) Surface by C₆₀F₄₈ Molecule Adsorption

Fluorination of Cu(001) Surface by C₆₀F₄₈ Molecule Adsorption

Role of C–F Bonding on the Optical Properties of Fluorinated Graphene Oxide

Patterning of Gold Nanoparticles on Fluoropolymer Films by Using Patterned Surface Grafting and Layer-by-Layer Deposition Techniques

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Fluoride ions at the Cu–fluoropolymer interface

Cited by 5 publications

References 27 publications

Fluorination of Cu(001) Surface by C60F48 Molecule Adsorption

Fluorination of Cu(001) Surface by C60F48 Molecule Adsorption

Role of C–F Bonding on the Optical Properties of Fluorinated Graphene Oxide

Patterning of Gold Nanoparticles on Fluoropolymer Films by Using Patterned Surface Grafting and Layer-by-Layer Deposition Techniques

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Fluorination of Cu(001) Surface by C₆₀F₄₈ Molecule Adsorption

Fluorination of Cu(001) Surface by C₆₀F₄₈ Molecule Adsorption