Study of Carbon and Silicon Radical Reactions by Means of Pulsed seed Jet Method

脉冲种子喷射法研究碳硅自由基反应

• 批准号: 01470077
• 负责人: KODA Seiichiro
• 金额: $ 4.29万
• 依托单位: Tokyo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01470077/
• 关键词: Laser Vaporization; Laser Ablation; Seed Jet; Carbon Cluster; Silicon Cluster; Photoionization Mass-spectroscopy; シ-ドジェット法; 炭素・ケイ素ラジカル; ケイ素ラジカル

An pulsed jet apparatus was devised for preparing clusters and radicals via Nd : Yag laser (532 nm) induced vaporization from solid surfaces of carbon and/or silicon rods. The products were detected and measured by ArF excimer laser photoionization (193 nm) TOF mass-spectroscopy. In addition, laser-induced incandescence experiments were carried out.A variety of carbon, silicon, and carbon-silicon mixed clusters were formed via the laser vaporization of a silicon rod in the presence of hydrocarbon gases such as ethane. The effects of the light intensity of the vaporization laser and of the partial pressure of the added hydrocarbon gas were investigated. At the same time, the laser-induced incandescence experiments clearly showed the existence of particulate products in the ejected pulsed seed jet.Thus the present apparatus is proved to be suitable for preparation of clusters and radicals, and also for the study of their reactions to yield larger clusters and partilulate products. It is desirable that the apparatus is improved by employing a system of higher vacuum and larger pumping speed, in order to study various different kinds of clusters and radicals in more detail.

设计了一种脉冲喷射装置，用于从碳和/或硅棒的固体表面通过激光(532 Nm)诱导蒸发制备团簇和自由基。用ArF准分子激光光解离(193 Nm)飞行时间质谱仪对产物进行了检测。此外，还进行了激光诱导白炽光实验，在乙烷等烃类气体存在的情况下，通过激光蒸发硅棒，形成了各种碳、硅和碳-硅混合团簇。研究了蒸发激光的光强和添加的碳氢气体分压的影响。同时，激光诱导白炽光实验清楚地表明，在所发射的脉冲种子射流中存在颗粒产物，因此，本装置适用于团簇和自由基的制备，也适用于研究它们产生更大团簇和颗粒状产物的反应。为了更详细地研究各种不同类型的团簇和自由基团，人们希望通过采用更高真空和更大抽气速度的系统来改进装置。

项目成果

Azuchi Harano, Jin Kinoshita, and Seiichiro Koda: "Decomposition of Gaseous Hydrocarbons in a Laserーinduced Plasma as a Novel Carbonaceous Source for Cluster Formation" Chem. Phys. Letters. 172. 219-223 (1990)

Azuchi Harano、Jin Kinoshita 和 Seiichiro Koda：“激光诱导等离子体中气态碳氢化合物的分解作为团簇形成的新型碳源”，《化学快报》172。219-223 (1990)

Azuchi Harano, Jin Kinoshita, and Seiichiro Koda: "Decomposition of Gaseous Hydrocarbons in a Laser-induced Plasma as a Novel Carbonaceous Source for Cluster Formation" Chem. Phys. Letters,. 172. 219-223 (1990)

Azuchi Harano、Jin Kinoshita 和 Seiichiro Koda：“激光诱导等离子体中气态碳氢化合物的分解作为簇形成的新型碳源” Chem。

Azuchi Harano,jin Kinoshita,and Seiichiro Koda: "Decomposition of Gaseous Hydrocarbons in a Laserーinduced Plasma as a Novel Carbonaceous Source for Cluster Formation" Chem.Phys.Letters. 172. 219-223 (1990)

Azuchi Harano、Jin Kinoshita 和 Seiichiro Koda：“激光诱导等离子体中气态碳氢化合物的分解作为团簇形成的新型碳源”Chem.Phys.Letters 172. 219-223 (1990)

原野安土: "レ-ザ-蒸発法による炭素・ケイ素クラスタ-類の生成" 日本化学会第59春季年会. (1990)

Azuchi Harano：“利用激光蒸发法生成碳和硅簇”，第 59 届日本化学会春季年会（1990 年）。