机械对声光发光和声化学光发光的影响
Atiyeh Aghelmaleki1, Hossein Afarideh2, Carlos Cairós3
1Department of Energy Engineering and Physics, Amirkabir University of Technology, 424 Hafez Avenue, 15875-4413 Tehran, Iran; Third Institute of Physics, Georg-August-University Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
Ultrasonics sonochemistry
|November 16, 2024
概括
机械显著改变液体中的声光发光 (SL) 和声化学发光 (SCL). 动可以放大排放,但会灭醇SCL,影响泡动力学和光辐射特性.
科学领域:
- 物理化学 物理化学
- 声学 声学 在声学上
- 化学物理 化学物理
背景情况:
- 音色发光 (SL) 和音色化学发光 (SCL) 是来自化液体的光辐射.
- 这些排放提供了对化学活动和泡动态的洞察.
- 了解影响这些排放的因素对于它们作为诊断工具的应用至关重要.
研究的目的:
- 为了研究机械对音色发光和音色化学发光的影响.
- 分析如何影响光辐射的空间分布和强度.
- 阐明液体流在空洞化系统中的作用.
主要方法:
- 用溶解的气体 (,,) 和盐或醇对液体 (水,乙烯基醇,酸) 进行超声波处理.
- 在20-40 kHz频率范围内应用机械.
- 分析SL和SCL排放的空间分布和强度.
- 高速视频录制化动态.
主要成果:
- 动改变了蓝色/白色宽带SL和色D线排放的空间分布和强度.
- 排放通常通过来放大,但有显著的例外.
- 来自明醇的 Sonochemiluminescence 通常通过机械动来灭.
- 在时观察到增强的气体扩散和气泡分离/脱.
- 在的酸中出现了呈现明亮SL闪光的大型气泡.
结论:
- 机械动显著改变了化诱导的光辐射.
- 动对SL和SCL的影响是复杂的,并取决于系统参数.
- 由引起的大量液体流动会影响泡动态,影响气体扩散和泡大小分布.
- 可以从大气泡中增强SL,特别是在特定的介质中,如酸.
相关概念视频
Photoluminescence: Fluorescence and Phosphorescence
1.6K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
1.6K
Photoluminescence: Applications
379
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
379
Variables Affecting Phosphorescence and Fluorescence
489
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
489


