Electron-induced chemistry is relevant to many processes that occur when ionizing radiation interacts with matter. This includes damage, curing of polymers, and nanofabrication but also the formation complex molecules in molecular ices grown on dust particles space. High-energy liberates from such materials an abundance secondary electrons which most have energies below 20 eV. These efficiently...

H.-R. Schulten and W. D. Lehmann Institute of Physical Chemistry, University of Bonn, Wegeierstraße 12, D-5300 Bonn Z. Naturforsch. 83 b, 770-781 (1978); received March 21, 1978 Field Desorption Mass Spectrometry, a-Amino Acid Methionine The fragmentation of methionine in field desorption mass spectrometry has been studied. Decomposition mechanisms are described which are based on stable isotop...

The gas desorption and secondary electron multiplication induced by bombardment tend to induce severe low-pressure discharge effects in space microwave device cavities. Nevertheless, few studies have focused on both emission electron-stimulated (ESD). Although the suppression of electrons graphene was found be better our previous study, it is still unclear whether surface modification graphene,...

In situ analysis of hydrocarbon desorption from hydrogen terminated Si( 100) surfaces was performed in a silicon molecular beam epitaxy system, using reflection electron energy loss spectroscopy, in conjunction with conventional reflection high energy electron diffraction analysis. Measurements of C K edge core loss intensities demonstrate that this method is sufficiently sensitive to enable in...

The quest for femtochemistry provided a guiding motivation for many researchers [1,2] far in advance of the award of the 1999 Nobel Prize in Chemistry to Ahmed Zewail “for his pioneering investigation of fundamental chemical reactions, using ultra short laser flashes, on the time scale on which the reactions actually occur” [3]. The rich array of possibilities that femtochemistry potentially of...

Past efforts to achieve selective bond scission by vibrational excitation have been thwarted by energy thermalization. Here we report resonant photodesorption of hydrogen from a Si(111) surface using tunable infrared radiation. The wavelength dependence of the desorption yield peaks at 0.26 electron volt: the energy of the Si-H vibrational stretch mode. The desorption yield is quadratic in the ...