Probing nano-scale viscoelastic response in air and in liquid with dynamic atomic force microscopy

被引：7

作者：

Crippa, Federica ^{[1
]}

Thoren, Per-Anders ^{[2
]}

Forchheimer, Daniel ^{[2
]}

Borgani, Riccardo ^{[2
]}

Rothen-Rutishauser, Barbara ^{[1
]}

Petri-Fink, Alke ^{[1
,3
]}

Haviland, David B. ^{[2
]}

机构：

[1] Univ Fribourg, Adolphe Merkle Inst, BioNanomat Grp, Chemin Verdiers 4, CH-1700 Fribourg, Switzerland

[2] KTH Royal Inst Technol, Nanostruct Phys, SE-10791 Stockholm, Sweden

[3] Univ Fribourg, Dept Chem, Chemin Musee 8, CH-1700 Fribourg, Switzerland

来源：

SOFT MATTER | 2018年 / 14卷 / 19期

基金：

瑞士国家科学基金会;

关键词：

ELASTIC PROPERTIES; STIFFNESS; SURFACES; FLUIDS;

D O I：

10.1039/c8sm00149a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We perform a comparative study of dynamic force measurements using an Atomic Force Microscope (AFM) on the same soft polymer blend samples in both air and liquid environments. Our quantitative analysis starts with calibration of the same cantilever in both environments. Intermodulation AFM (ImAFM) is used to measure dynamic force quadratures on the same sample. We validate the accuracy of the reconstructed dynamic force quadratures by numerical simulation of a realistic model of the cantilever in liquid. In spite of the very low quality factor of this resonance, we find excellent agreement between experiment and simulation. A recently developed moving surface model explains the measured force quadrature curves on the soft polymer, in both air and liquid.

引用

页码：3998 / 4006

页数：9

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