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Measuring Reaction Rates

Measuring Reaction Rates

Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical field in...

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Updated: Jul 11, 2026

$Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2$

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Published on: December 8, 2016

线性反转三角仪用于软物质的现场中子反射计.

Kathryn E Shaffer¹, Brendan Louie Bagorio², Ahmed Al Kindi²

¹Materials Department, University of California, Santa Barbara, Santa Barbara, CA 93106, USA.

Tribology letters

|September 17, 2025

概括

我们设计了一种新的线性反向三角计,用于现场中子反射计. 这种仪器允许详细研究软材料.

关键词:

中子反射计中子反射计.软物质是一种柔软的物质.Tribometer 的设计设计.

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科学领域:

软物质物理学软物质物理学
部落学 (tribology) 是一个学科.
中子散射是一种中子散射.

背景情况:

中子反射计是一种强大的技术,用于界面上的软材料的特征.
由于实验的局限性,以前的方法在将软材料结构与tribological特性相关联方面遇到了挑战.
了解界面结构对于预测部落学行为至关重要.

研究的目的:

设计和委托一个新的线性反转式三角计用于现场中子反射计.
克服以前仪器在研究软物质 Tribology 的局限性.
为了能够同时测量界面结构和tribological属性.

主要方法:

为中子束线操作开发定制的线性反转三角计.
将三角计与中子反射测量功能的整合.
调试试验涉及压缩软和水合材料与盘.

主要成果:

成功设计和实施适用于中子反射计的试管计.
证明仪器控制正常力和滑动速度的能力.
验证关键设计考虑因素:安全性,中子传导和样品定位.

结论:

开发的线性反转式三角计可在现场进行软物质三角学的研究.
这种仪器提升了将接口结构与宏观 Tribological 现象联系起来的能力.
未来的研究可以利用这种设计来探索在剪切下复杂的软材料接口.