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Determination of Condensate Material Properties from Droplet Deformation.
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2020-08-28 , DOI: 10.1021/acs.jpcb.0c06230
Huan-Xiang Zhou 1
Affiliation  

I derive theoretical results that relate the effective spring constant, χ, of protein droplets to their material properties. χ, defined as the ratio between a uniaxial applied force and the extent of the corresponding deformation, can be measured by optical tweezers. When the deformation is static, where the applied force is balanced by the interfacial tension of the droplet, the spring constant allows for the determination of the surface tension (γ). When a sinusoidal force is applied (at frequency ω), the dynamic spring constant χ(ω) is related to both γ and the complex shear modulus, G*(ω), of the droplet. The results derived here enable accurate extraction of γ and G*(ω) from χ(ω) data.

中文翻译:

从液滴变形确定冷凝物材料特性。

我推导出将蛋白质液滴的有效弹簧常数 χ 与其材料特性相关联的理论结果。χ,定义为单轴施加的力与相应变形程度之间的比率,可以通过光镊测量。当变形为静态时,施加的力由液滴的界面张力平衡,弹簧常数允许确定表面张力 (γ)。当施加正弦力时(频率为 ω),动态弹簧常数 χ(ω) 与 γ 和液滴的复剪切模量G *(ω) 相关。此处得出的结果能够从 χ(ω) 数据中准确提取 γ 和G *(ω)。
更新日期:2020-09-24
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