Aluminium metallisation of argon and oxygen plasma-modified polycarbonate thin film surfaces

Rastomjee, C.S.; Keil, Matthias; Sotobayashi, Hideto; Bradshaw, Alexander M.; Lamont, C. C. L.; Gador, D.; Umbach, E.

doi:10.1016/s0169-4332(98)00348-1

Cited by 15 publications

(19 citation statements)

References 25 publications

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“…The mechanisms of formation of the metal/polymer interfaces depend on three main features: the availability of reactive functional groups at the polymer surface, the nano- and micro-structure of the surface, and the valence of the metal adsorbate(s). Metals that easily form oxides, such as Al, Cr, Fe, or Ni, will form stable metal (M-)O-C covalent bonds; for instance, Al atoms attack carbonyls and the in-chain C=O of polycarbonate to from C=O-Al [ 23 , 24 , 25 ]. It has been shown that the polymer/metal interface derived from coordination bonding, i.e., the electron donor (groups within organic components) and the electron acceptor (metal atoms or ions) produce a charge transfer to form an electric double layer, would produce desirable adhesion [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

An Environmentally Friendly Supramolecular Glue Developed from Natural 3,4-Dihydroxybenzaldehyde

Wang

Liu

et al. 2022

Polymers

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Liquid adhesive suffers from the emission of volatile organic compounds (VOCs) that have detrimental effects on human beings. Herein, an environmentally friendly glue containing a novel supramolecule dissolved in non-toxic ethanol is developed. Poly (ether amine) (PEA) and 3,4-dihydroxybenzaldehyde (dhba) is utilized to synthesize catechol-terminated PEA, and subsequent complexation by Fe3+ results in the supramolecular component (PEA-dhba-Fe3+). The Fourier transform infrared (FTIR) spectrum together with the UV-vis spectrum reveal the existence of quinone converted from catechol. Raman spectra prove the existence of a successful complex of catechol-terminated PEA with Fe3+. The tri-complex is found to be the predominant mode and can successfully form into clusters, serving as a physical cross-linking network. The PEA-dhba-Fe3+ exhibits strong adherence to metal substrates compared to polymeric substrates, with its shear strength reaching as high as 1.36 ± 0.14 MPa when the pH of the glue is adjusted to 8. The obvious improvement of adhesion originates from the formation of interfacial coordination bonds between quinone/catechol and metal atoms, as well as their cations, as revealed by X-ray photoelectron spectroscopy (XPS) and theoretical calculations. With consideration of its merits, including strong adhesion and the minor emission of VOCs compared to commercial epoxy and acrylic adhesives, this environmentally friendly supramolecular glue has a range of cutting-edge applications as an adhesive for metal substrates.

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Section: Resultsmentioning

confidence: 99%

An Environmentally Friendly Supramolecular Glue Developed from Natural 3,4-Dihydroxybenzaldehyde

Wang

Liu

et al. 2022

Polymers

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“…29 The subsequent treatment of the Teflon AF layer with oxygen plasma generated strongly oxidized islets with hydrophilic surface functional groups (-COOH, -OH, .C¼O) available for rapid solution-based deposition of Ag. 21,22 The simple change of the plasma gasses (CHF 3 or oxygen) rendered the desired strong adhesion between PC, Teflon, and silver. Plasma treatments were critical for spin-coating the fluoropolymer and the solution deposition of the thin silver film, as we were not able to obtain continuous layers on untreated plastics.…”

Section: Resultsmentioning

confidence: 99%

“…The rotation speed was maintained at 800 rpm using a Chemat Technology Spin coater to attain the desired layer thickness of 550 nm measured using a Tencor Alpha Step Profilometer. The Teflon AF coated PC (PC-T) substrates were dried at room temperature for 1 h. The Teflon AF covered surface was exposed to oxygen plasma to subsequently generate oxygen-containing surface hydrophilic functionalities, 21,22 which enable rapid silvering. A short burst of oxygen plasma with the following parameters was used: pressure, 150 mTorr; rf power, 100 W; and treatment time, 6 s. The final thickness of the fluoropolymer layer, measured using the surface profiler, was found to be 500 nm after the oxygen plasma etch.…”

Section: Methodsmentioning

confidence: 99%

Low-Cost Plastic Plasmonic Substrates for Operation in Aqueous Environments

2010

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We report a novel design of a multilayer stack to attain surface-plasmon-coupled emission (SPCE) enhancements in liquid medium. Variation in thickness of the multilayer affects the position and depth of resonance plasmon dips. Numerical investigation resulted in an optimal stack configuration that supports long-range surface plasmons. SPCE substrates were prepared on plain BK7 glass and Teflon-AF coated polycarbonate (PC-T) substrates by modifying their surface functionalities using plasma etching. The changes in refractive indices due to the presence of the fluoropolymer layer help reduce the SPCE exit angle from α = 75° (plain BK7) to α = 60° (PC-T) in water without requiring specialized optics.

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“…Prior to silver deposition, the plastic substrates were treated with oxygen plasma. The treatment not only removes any surface residues from the packaging tape, but also enhances the amount of carbon-oxygen surface chemical structures by the generation of oxygen-containing surface functional groups (-COOH, -OH, >C=O) and presents a hydrophilic surface available for rapid silvering by improving its surface acidity [23,24]. The procedure increases the number of the active sites for reduction of the silver ions and helps with the film uniformity.…”

Section: Resultsmentioning

confidence: 99%

Solution-Deposited Thin Silver Films on Plastic Surfaces for Low-Cost Applications in Plasmon-Coupled Emission Sensors

et al. 2009

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We report the deposition of highly uniform thin silver films on plastic materials using a wet-chemistry method, suitable for surface plasmon-coupled emission (SPCE). This approach is reproducible for diverse lowcost applications and versatile to generate silver surfaces on various plastics substrates. An oxygen plasma pretreatment of the plastic provides for rapid silvering, leading to a 47-nm-thick continuous film for SPCE applications. The surface smoothness and thickness of the films have been estimated using atomic force microscope. The higher refractive index of polycarbonate, resulted in an SPCE angle of θ F =47 0 for Rhodamine B, compared to glass (θ F = 50 0 ). The current study presents details on film deposition conditions, appropriate choice of index matching fluids, substrates, and light sources that play a vital role to augment SPCE emission intensity.

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Aluminium metallisation of argon and oxygen plasma-modified polycarbonate thin film surfaces

Cited by 15 publications

References 25 publications

An Environmentally Friendly Supramolecular Glue Developed from Natural 3,4-Dihydroxybenzaldehyde

An Environmentally Friendly Supramolecular Glue Developed from Natural 3,4-Dihydroxybenzaldehyde

Low-Cost Plastic Plasmonic Substrates for Operation in Aqueous Environments

Solution-Deposited Thin Silver Films on Plastic Surfaces for Low-Cost Applications in Plasmon-Coupled Emission Sensors

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