用于大剪切应变下纳米流变学研究的表面力仪

Surface force apparatus for nanorheology under large shear strain.

作者信息

Bureau Lionel

机构信息

Institut des Nanosciences de Paris, UMR 7588 CNRS-Université Paris 6, 140 Rue de Lourmel, 75015 Paris, France.

出版信息

Rev Sci Instrum. 2007 Jun;78(6):065110. doi: 10.1063/1.2748362.

DOI:10.1063/1.2748362

PMID:17614641

Abstract

We describe a surface force apparatus designed to probe the rheology of a nanoconfined medium under large shear amplitudes (up to 500 microm). The instrument can be operated in closed loop, controlling either the applied normal load or the thickness of the medium during shear experiments. Feedback control allows us to greatly extend the range of confinement/shear strain attainable with the surface force apparatus. The performances of the instrument are illustrated using hexadecane as the confined medium.

摘要

我们描述了一种表面力装置，该装置旨在探测在大剪切幅度（高达500微米）下纳米受限介质的流变学。该仪器可以闭环操作，在剪切实验期间控制施加的法向载荷或介质的厚度。反馈控制使我们能够大大扩展表面力装置可实现的限制/剪切应变范围。以十六烷作为受限介质来说明该仪器的性能。