Dissociative Electron Attachment to Polyatomic Molecules - IV : Methane

Dissociative Electron Attachment to Polyatomic Molecules - II : Hydrogen Sulphide

In the present paper, we report the details of the kinetic energy and angular distributions of the H^{-}, S^{-}/SH^{-} fragment ions produced due to dissociative electron attachment in H_{2}S molecules at resonances peaking at 2.2 eV, 5.2 eV, 7.5 eV and 10 eV.

Dissociative Electron Attachment to Polyatomic Molecules - III : Ammonia

In this paper, we discuss the dissociative electron attachment process in Ammonia. Kinetic energy and angular distributions of H^{-} and NH_{2}^{-} fragment anions across the two well known resonances at 5.5 eV and 10.5 eV are reported. The angular distributions show deviation of axial recoil approximation akin to that observed in water.

Dissociative Electron Attachment to Polyatomic Molecules - V : Formic Acid and Propyl Amine

In this paper, we discuss the dissociative electron attachment process in Formic Acid and Propyl Amine. These are molecules containing more than one functional group and have low symmetry (Cs group). We measured the kinetic energy and angular distributions of fragment H^{-} ions from the resonances observed in these molecules and compared with that in the precursor molecules, namely - Water, Ammonia and Methane. Measurements suggest that the dissociation dynamics in bigger molecules are independent of overall symmetry of the molecule, rather depend only on the local symmetry of functional grou…

Dissociative Electron Attachment to Polyatomic Molecules - I : Water

Using the velocity map imaging technique, we studied and characterized the process of Dissociative Electron Attachment (DEA) in polyatomic molecules like Water, Hydrogen Sulphide, Ammonia, Methane, Formic Acid and Propyl Amine. We present the details of these studies in a series of 5 articles. In the first article here, we discuss the DEA process in gas phase water ($H_{2}O$ and $D_{2}O$) molecules. Electrons of 6.5 eV, 8.5 eV and 12 eV are captured by water molecules in neutral ground state to form $H_{2}O^{-*}$ ($D_{2}O^{-*}$) resonant states which dissociate into an anion fragment and one o…

Dissociative adsorption of methane on surface oxide structures of Pd-Pt alloys

The dissociative adsorption of methane on variously oxidized Pd, Pt and Pd-Pt surfaces is investigated using density-functional theory, as a step towards understanding the combustion of methane on these materials. For Pd-Pt alloys, models of surface oxide structures are built on the basis of known oxides on Pd and Pt. The methane adsorption energy presents large variations depending on the oxide structure and composition. Adsorption is endothermic on the bare Pd(111) metal surface as well as on stable thin layer oxide structures such as the ($\sqrt{5}\times\sqrt{5}$) surface oxide on Pd(100) a…

氙中间层对铂基底上氘代甲烷解离电子附着的影响

Influence of a Xenon interlayer on dissociative electron attachment to deuterated methane on a platinum substrate

本研究探讨铂基底与CD4薄膜间氙中间层对解离电子附着的影响，结合DFT计算揭示氙膜厚度对结合能的作用，发现6 ML氙可减弱表面效应、20 ML使D-解吸饱和，且氙层能增强DEA并抑制电子返回金属。