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首页> 外文期刊>Applied Surface Science >Ageing of plasma-mediated coatings with embedded silver nanoparticles on stainless steel: An XPS and ToF-SIMS investigation
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Ageing of plasma-mediated coatings with embedded silver nanoparticles on stainless steel: An XPS and ToF-SIMS investigation

机译：不锈钢上嵌入银纳米粒子的等离子体介导涂层的时效：XPS和ToF-SIMS研究

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摘要

Nanocomposite thin films (～170nm), composed of silver nanoparticles enclosed in an organosilicon matrix, were deposited onto stainless steel, with the aim of preventing biofilm formation. The film deposition was carried out under cold plasma conditions, combining radiofrequency (RF) glow discharge fed with argon and hexamethyldisiloxane and simultaneous silver sputtering. XPS and ToF-SIMS were used to characterize Ag-organosilicon films in native form and after ageing in saline solution (NaCl 0.15 M), in order to further correlate their lifetime with their anti-fouling properties. Two coatings with significantly different silver contents (7.5% and 20.3%) were tested. Surface analysis confirmed the presence of metallic silver in the pristine coating and revealed significant modifications after immersion in the saline solution. Two different ageing mechanisms were observed, depending on the initial silver concentration in the film. For the sample exhibiting the low silver content (7.5%), the metal amount decreased at the surface in contact with the solution, due to the release of silver from the coating. As a result, after a 2-day exposure, silver nanoparticles located at the extreme surface were entirely released, whereas silver is still present in the inner part of the film. The coating thickness was not modified during ageing. In contrast, for the high silver content film (20.3%), the thickness decreased with immersion time, due to significant silver release and matrix erosion, assigned to a percolation-like effect. However, after 18 days of immersion, the delamination process stopped and a thin strongly bounded layer remained on the stainless steel surface.
机译：为了防止生物膜的形成，将纳米银复合薄膜（〜170nm）由包裹在有机硅基质中的银纳米颗粒组成，沉积在不锈钢上。膜沉积在冷等离子体条件下进行，将氩气和六甲基二硅氧烷注入的射频（RF）辉光放电与同时进行的银溅射结合起来。 XPS和ToF-SIMS用于表征天然形式的Ag-有机硅薄膜，并在盐水溶液（NaCl 0.15 M）中老化后，以进一步将其寿命与防污性能相关联。测试了两种具有明显不同的银含量（7.5％和20.3％）的涂层。表面分析证实了原始涂层中存在金属银，并显示了浸入盐水溶液后的显着修饰。观察到两种不同的老化机理，这取决于膜中的初始银浓度。对于具有低银含量（7.5％）的样品，由于与银的涂层释放，金属含量在与溶液接触的表面减少。结果，在暴露两天后，位于极端表面的银纳米颗粒被完全释放，而银仍存在于膜的内部。涂层的厚度在老化过程中没有改变。相反，对于高银含量的薄膜（20.3％），由于大量的银释放和基体腐蚀，厚度随浸入时间而减小，这被赋予了类似渗流的作用。但是，在浸泡18天后，分层过程停止了，并且薄薄的牢固结合层保留在不锈钢表面上。

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  • 来源
    《Applied Surface Science》 |2010年第22期|p.6499-6505|共7页
  • 作者

    S.Zanna; CSaulou; M.Mercier-Bonin; B.Despax; P.Raynaud; A.Seyeux; P.Marcus;

  • 作者单位

    Laboratoire de Physico-Chimie des Surfaces, CNRS-ENSCP (UMR7045), Ecole Nationale Superieure de Chimie de Paris (chimie ParisTech),11 rue Pierre et Marie Curie, 75005 Paris, France;

    Universite de Toulouse, INSA, UPS, 1NP, L1SBP, 135 Avenue de Rangueil, F-31077 Toulouse, France,INRA, UMR792 Ingenierie des Systemes Biologiques et des Precedes, F-31400 Toulouse, France,CNRS, UMR5504, F-31400 Toulouse, France;

    Universite de Toulouse, INSA, UPS, 1NP, L1SBP, 135 Avenue de Rangueil, F-31077 Toulouse, France,INRA, UMR792 Ingenierie des Systemes Biologiques et des Precedes, F-31400 Toulouse, France,CNRS, UMR5504, F-31400 Toulouse, France;

    Universite de Toulouse, UPS, INPT, LAPLACE, 118 route de Narbonne, F-31062 Toulouse cedex 9, France,CNRS, LAPLACE, F-31062 Toulouse, France;

    Universite de Toulouse, UPS, INPT, LAPLACE, 118 route de Narbonne, F-31062 Toulouse cedex 9, France,CNRS, LAPLACE, F-31062 Toulouse, France;

    Laboratoire de Physico-Chimie des Surfaces, CNRS-ENSCP (UMR7045), Ecole Nationale Superieure de Chimie de Paris (chimie ParisTech),11 rue Pierre et Marie Curie, 75005 Paris, France;

    Laboratoire de Physico-Chimie des Surfaces, CNRS-ENSCP (UMR7045), Ecole Nationale Superieure de Chimie de Paris (chimie ParisTech),11 rue Pierre et Marie Curie, 75005 Paris, France;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    plasma deposit; surface characterization; ageing; silver nanoparticles; organosilicon films;

    机译：等离子沉积表面表征老化;银纳米颗粒;有机硅膜;

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