研究目的
The aim of the present work is to study the effect of laser irradiation on soot particles in term of optical properties, particles nanostructure as well as aggregate morphology.
研究成果
The results indicate that soot nanostructure and optical properties are strongly dependent on the laser energy density when irradiated by a laser source. This is significant for ethylene soot, while for methane soot the degree of variation of such properties is less pronounced, at least in the investigated heating conditions.
研究不足
The study is limited to soot particles generated from ethylene and methane flames under specific conditions. The effects of laser irradiation on soot properties may vary with different fuels or combustion conditions.
1：Experimental Design and Method Selection:
The study involves the irradiation of soot particles with a 1064-nm short laser pulse and the analysis of their optical properties, nanostructure, and aggregate size. Wavelength-resolved extinction measurements in the visible range are used to follow the transformation of soot particles by varying the laser energy density.
2：Sample Selection and Data Sources:
Carbonaceous particles are sampled from nitrogen-quenched diffusion flames of ethylene and methane.
3：List of Experimental Equipment and Materials:
A Nd:YAG laser (Quantel, Big-Sky, CFR 400) for irradiation, a Halogen lamp (400 W) as a light source, a spectrograph (Shamrock 303i) connected to an ICCD camera (iStar 334T, Andor Technology) for extinction measurements, and a Raman microscope (Horiba XploRA) for nanostructure analysis.
4：Experimental Procedures and Operational Workflow:
Soot particles are irradiated with varying laser fluences, and their optical properties are analyzed through extinction measurements. Particle size distributions are measured using an electrical impactor (ELPI, Dekati), and nanostructure is analyzed via Raman spectroscopy.
5：Data Analysis Methods:
The extinction coefficient is analyzed using the Beer-Lambert law, and the optical band gap is evaluated using the Tauc equation. Raman spectra are analyzed to understand changes in soot nanostructure.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
ICCD camera
iStar 334T
Andor Technology
Detection of transmitted light
立即获取同款设备 -
Nd:YAG laser
CFR 400
Quantel, Big-Sky
Irradiation of soot particles
暂无现货
预约到货通知
-
Halogen lamp
Light source for extinction measurements
暂无现货
预约到货通知
-
Spectrograph
Shamrock 303i
Analysis of transmitted light
暂无现货
预约到货通知
-
Raman microscope
XploRA
Horiba
Analysis of soot nanostructure
暂无现货
预约到货通知
-
Electrical low pressure impactor
ELPI
Dekati
Measurement of particle size distributions
暂无现货
预约到货通知
-
登录查看剩余4件设备及参数对照表
查看全部
