偏光角度 (AOP) 属性用于交联聚合物的光学分类
Siti Nurainie Tukimin1, Salmah Binti Karman1, Wan Safwani Wan Kamarul Zaman2
1Department of Biomedical Engineering, Faculty of Engineering, Universiti Malaya, Federal Territory of Kuala Lumpur, Kuala Lumpur 50603 Malaysia.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|January 22, 2025
概括
本研究介绍了一种简单的方法,通过测量极化光 (AOP) 的角度来分类聚合物,而无需标签. 该技术为材料分析和光学分类提供了低成本,直接的方法.
科学领域:
- 光学和光子学 在光学和光子学.
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
背景情况:
- 光-物质相互作用对于材料分类至关重要.
- 使用偏光光的光学分类是未经探索的,通常仅限于强度测量.
- 测量极化光的角度 (AOP) 提供了直接的,无标签的分类方法.
研究的目的:
- 要确定交联聚合物的极化光 (AOP) 角度属性.
- 为材料分类提出一种新的,低成本的极化测量技术.
- 探索AOP作为基于强度的光学分类的替代方案.
主要方法:
- 开发了一种利用分散角度 (90°,100°,110°,120°) 的极化测量技术.
- 通过结合聚合物的吸收,传递和散射特性来测量AOP.
- 根据其AOP值将聚合物分为两组.
主要成果:
- 与正常样本 (n=3.0%) 相比,成功测量了不同聚合物样本的AOP (t1 = 3.1-3.3%,t2 = 3.4-3.7%).
- 在没有复杂的配方或标签的情况下,展示了一种直接,简单的方法来确定极化程度.
- 根据AOP. 实现了将聚合物分为两个不同的组的分类.
结论:
- 拟议的方法提供了一种简单而直接的方式来确定用于材料分类的聚合物AOP.
- 该技术可应用于用于生物材料分类的光学成像和传感平台.
- 未来的工作可能涉及对基于agarose的组织模仿幽灵的光学性质的研究,用于生物样本模拟.
相关概念视频
Polymer Classification: Stereospecificity
2.4K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.4K
Polymer Classification: Crystallinity
2.8K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.8K
Polymer Classification: Architecture
2.6K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.6K
Properties of Enantiomers and Optical Activity
16.7K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
16.7K
Measuring Reaction Rates
24.4K
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...
24.4K
Polymers: Molecular Weight Distribution
3.2K
For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
3.2K


