Interface roughness of plasma deposited polymer layers

Zhang, Yi; Arfsten, Judith; Pihan, Sascha A.; Kaule, Tassilo; Förch, Renate; Berger, Rüdiger

doi:10.1016/j.jcis.2010.07.051

Cited by 14 publications

(19 citation statements)

References 34 publications

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“…The ppAA films deposited at a higher plasma power level ( P = 90 W) resulted in a higher cross‐linking density than those deposited at a lower power level ( P = 5 W) . Generally, films deposited at higher input power showed a higher roughness and cross‐linking density . The energetic ion bombardment and UV irradiation during the plasma deposition process determine the cross‐linking density of the film …”

Section: Methodsmentioning

confidence: 98%

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Young's modulus of plasma‐polymerized allylamine films using micromechanical cantilever sensor and laser‐based surface acoustic wave techniques

Toda

Miyake

Chu

et al. 2018

Plasma Processes & Polymers

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Mechanical properties of ultra‐thin organic films are fundamentally important in coating applications. Micromechanical cantilever sensor (MCS) and laser‐based surface acoustic wave (LA‐SAW) techniques were both used to measure Young's moduli (E) of plasma polymerized films at different humidities (H). For plasma polymerized allylamine (ppAA) films deposited at 5 W and 90 W, E of 1400 ± 350 MPa and 110 ± 20 MPa at H between 10 and 40%, and 1070 ± 250 MPa and 32 ± 10 MPa at H between 70 and 80% were measured. The LA‐SAW technique revealed E lower than 60% of that measured by MCS. The difference suggested either an enhanced swelling at the air interface or a gradient of cross‐linking density.

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Section: Methodsmentioning

confidence: 98%

“…This in turn affects the cross‐linking density and mobility of polymeric chains . In general, it has been shown that films deposited at a higher input power level exhibit a higher cross‐linking density . Thereby E , the film's hardness and its wear resistance can all be increased …”

Section: Introductionmentioning

confidence: 99%

Young's modulus of plasma‐polymerized allylamine films using micromechanical cantilever sensor and laser‐based surface acoustic wave techniques

Toda

Miyake

Chu

et al. 2018

Plasma Processes & Polymers

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“…145,156 In order to extend the photoresponse of MO x s to the visible region, many research groups have focused on doping with transition metal ions or non-metal elements, such as V, Co, Ag, Au, Fe, C, N, S, or I. 157À160 Zhang et al successfully doped V ions into TiO 2 NFs by electrospinning together vanadium and TiO 2 precursors and calcining at 500 C. 161 The bers retained their anatase phase aer calcination and XRD results conrmed the successful incorporation of V 4+ or V 5+ ions into the crystal lattice of the anatase TiO 2 NFs and also showed slight variations in crystallite size with an increase in doping ( Fig. 12(a and b)).…”

Section: Photocatalysismentioning

confidence: 99%

Hierarchical electrospun nanofibers for energy harvesting, production and environmental remediation

Kumar

Jayaraman

Sundarrajan

et al. 2014

Energy Environ. Sci.

293

143

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As the demand for energy is rapidly growing worldwide ahead of energy supply, there is an impulse need to develop alternative energy-harvesting technologies to sustain economic growth. Due to their unique optical and electrical properties, one-dimensional (1D) electrospun nanostructured materials are attractive for the construction of active energy harvesting devices such as photovoltaics, photocatalysts, hydrogen energy generators, and fuel cells. 1D nanostructures produced from electrospinning possess high chemical reactivity, high surface area, low density, as well as improved light absorption and dye adsorption compared to their bulk counterparts. So, research has been focused on the synthesis of 1D nanostructured fibers made from metal oxides, composites, dopants and surface modification.Furthermore, fine tuning these NFs has facilitated fast charge transfer and efficient charge separation for improved light absorption in photocatalytic and photovoltaic properties. The recent trend in exploring these electrospun nanostructures has been promising in-terms of reducing costs and enhancing the efficiency compared to conventional materials. This review article presents the synthesis of 1D nanostructured fibers made via electrospinning and their applications in photovoltaics, photocatalysis, hydrogen energy harvesting and fuel cells. The current challenges and future perspectives for electrospun nanomaterials are also reviewed. Broader contextIn recent years, the world has been facing enormous challenges such as increasing energy demands, depleting power sources, and environmental pollution. In order to overcome these challenges, much attention has been focused on creating new hierarchical nanostructured materials and technologies for the adoption of cleaner solutions and renewable sources of energy. Although, various methods such as precipitation, hydrothermal and sol-gel have been adapted to synthesis novel nanostructures, electrospinning is one of the simplest and most effective technologies with scale-up potential for a wide range of nanomaterials aimed at industrial production. This review highlights recent developments in the fabrication of one dimensional nanostructured bers from metals, metal oxides, carbon nanobers, nanocomposite materials and so on, using electrospinning techniques. These electrospun nanomaterials exhibited enhancement in performance compared to conventional materials. In this review, we attempt to provide a detailed overview of such nanostructured materials in specic applications such as photovoltaics, photocatalysis, hydrogen generation and fuel cells. We believe that this review will provide sufficient background information and knowledge about electrospinning and pave the way for new innovations in electrospun nanomaterials for energy and environmental applications.

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“…This can be done very simply by fracturing the silicon substrate and the multilayer film. The face of the fractured multilayer can be investigated using AFM to characterize the interfaces between the individual layers; however, the layers cannot be analyzed by nanoindentation due to the resulting very rough surfaces. A smoother surface of the fractured sample can be prepared by mechanical grinding, polishing, dimpling, and ion milling, as in the investigation of multilayers by high‐resolution transmission electron microscopy (HRTEM) .…”

Section: Mechanical Properties Of Plasma Polymer Filmsmentioning

confidence: 99%

Elastic Modulus and Hardness of Plasma‐Polymerized Organosilicones Evaluated by Nanoindentation Techniques

Čech

Lukeš

Pálesch

et al. 2015

Plasma Processes & Polymers

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Nanoindentation techniques are today a standard tool for the characterization of mechanical properties of thin films at nanoscale. In this feature article, we introduce various techniques, together with their applications for plasma-polymerized organosilicones: starting from conventional instrumented nanoindentation, followed by continuous oscillatory loading and cyclic nanoindentation by partial unloading for assessing the depth profile of mechanical properties, to continuous mechanical mapping over the sample surface. Methods of analyzing and interpreting the measured data are presented to determine the elastic modulus and hardness of tested films. Plasma polymer films are materials of viscoelastic or elastic-plastic behavior; the correct technique must therefore be selected to give the most accurate mechanical property measurements. A number of limitations of the techniques are also discussed. A list of conditions for successful analysis of mechanical properties is included.

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Interface roughness of plasma deposited polymer layers

Cited by 14 publications

References 34 publications

Young's modulus of plasma‐polymerized allylamine films using micromechanical cantilever sensor and laser‐based surface acoustic wave techniques

Young's modulus of plasma‐polymerized allylamine films using micromechanical cantilever sensor and laser‐based surface acoustic wave techniques

Hierarchical electrospun nanofibers for energy harvesting, production and environmental remediation

Elastic Modulus and Hardness of Plasma‐Polymerized Organosilicones Evaluated by Nanoindentation Techniques

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