通过超雷利散射来确定临界微粒度
Suhrit Ghosh1, Anu Krishnan, Puspendu K Das
1Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India. raman@ipc.iisc.ernet.in
Journal of the American Chemical Society
|February 6, 2003
概括
这项研究使用超雷利散射 (HRS) 确定了含有NLO的表面活性剂的临界微粒度 (CMC). 还开发了一种新的探针分子,用于脂肪酸CMC的确定.
科学领域:
- 物理化学 物理化学
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
背景情况:
- 在各种化学应用中,表面活性剂自组装成粒至关重要.
- 确定关键菌度 (CMC) 对于理解表面活性剂的行为至关重要.
- 非线性光学 (NLO) 染色体可以纳入表面活性剂,以赋予其独特的特性.
研究的目的:
- 使用超雷利散射 (HRS) 来确定具有NLO染色体的表面活性剂的CMC.
- 为了研究NLO染色体位置 (尾部,头部,对面) 对表面活性剂聚合的影响.
- 开发和验证一种用于脂肪酸的CMC测定的新型探针分子.
主要方法:
- 使用超雷利散射 (HRS) 来监测表面活性剂聚合.
- 表面活性剂度的系统变化,以观察HRS信号的变化.
- 开发一种pH敏感探头分子,在质子化后增强HRS强度.
主要成果:
- 对于所有含有NLO的表面活性剂,在CMC附近观察到HRS信号强度的一致,前所未有的下降.
- 这种信号下降归因于前细胞聚合物的形成.
- 开发的探针分子成功确定了简单脂肪酸的CMC.
结论:
- HRS是一种可行的技术,用于确定NLO功能化的表面活性剂的CMC.
- 观察到的信号下降提供了对早期细胞形成的新见解.
- 这种新型探针分子为CMC的确定提供了一种新方法,特别是对于脂肪酸.
相关概念视频
01:37Super-resolution Fluorescence Microscopy
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
01:13Mass Analyzers: Overview
The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...