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首页> 外文期刊>Journal of Materials Research >Nanomechanical probing of layered nanoscale polymer films with atomic force microscopy
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Nanomechanical probing of layered nanoscale polymer films with atomic force microscopy

机译：原子力显微镜对层状纳米级聚合物薄膜的纳米力学探测

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摘要

The approach developed for the microindentation of layered elastic solids was adapted to analyze atomic force microscopy probing of ultrathin (1-100 nm-thick) polymer films on a solid substrate. The model for analyzing microindentation of layered solids was extended to construct two- and tri-step graded functions with the transition zones accounting for a variable gradient between layers. This "graded" approach offered a transparent consideration of the gradient of the mechanical properties between layers. Several examples of recent applications of this model to nanoscale polymer layers were presented. We considered polymer layers with elastic moduli ranging from 0.05 to 3000 MPa with different architecture in a dry state and in a solvated state. The most sophisticated case of a tri-layered polymer film with thickness of 20-50 nm was also successfully treated within this approach. In all cases, a complex shape of corresponding loading curves and elastic modulus depth profiles obtained from experimental data were fitted by the graded functions with nanomechanical parameters (elastic moduli and transition zone widths) close to independently determined microstructural parameters (thickness and composition of layers) of the layered materials.
机译：为分层弹性固体的微压痕开发的方法适用于分析固体基质上超薄（1-100 nm厚）聚合物薄膜的原子力显微镜探测。扩展了用于分析层状固体微观压痕的模型，以构建两步和三步分级函数，其中过渡区域考虑了层之间的可变梯度。这种“分级”方法透明地考虑了层之间机械性能的梯度。介绍了该模型在纳米级聚合物层上的最新应用的几个例子。我们考虑了在干燥状态和溶剂化状态下具有不同结构的弹性模量为0.05到3000 MPa的聚合物层。在这种方法中，厚度为20-50 nm的三层聚合物薄膜最复杂的情​​况也得到了成功的处理。在所有情况下，通过分级函数拟合具有从实验数据中获得的相应载荷曲线和弹性模量深度分布图的复杂形状，其中纳米力学参数（弹性模量和过渡区宽度）接近于独立确定的微观结构参数（厚度和层组成）分层材料。

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  • 来源
    《Journal of Materials Research》 |2004年第3期|p.716-728|共13页
  • 作者

    A. Kovalev; H. Shulha; M. Lemieux;

  • 作者单位

    Metal-Polymer Institute, National Academy of Sciences, 246050 Gomel, Belarus;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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