منابع مشابه
Interlayer cohesive energy of graphite from thermal desorption of polyaromatic hydrocarbons
We have studied the interaction of polyaromatic hydrocarbons ~PAHs! with the basal plane of graphite using thermal desorption spectroscopy. Desorption kinetics of benzene, naphthalene, coronene, and ovalene at submonolayer coverages yield activation energies of 0.50 eV, 0.85 eV, 1.40 eV, and 2.1 eV, respectively. Benzene and naphthalene follow simple first order desorption kinetics while corone...
متن کاملApparatus for low temperature thermal desorption spectroscopy of portable samples.
An experimental setup for low temperature thermal desorption spectroscopy (TDS) integrated in an ultrahigh vacuum-chamber housing a high-end scanning probe microscope for comprehensive multi-tool surface science analysis is described. This setup enables the characterization with TDS at low temperatures (T > 22 K) of portable sample designs, as is the case for scanning probe optimized setups or ...
متن کاملEnergetic cluster induced desorption from a graphite surface
Using molecular dynamics computer simulation it has been shown how a large cluster such as fullerene can create an acoustic wave with sufficient energy to gently eject molecules which have been adsorbed to a surface. In a preliminary study we demonstrated how this acoustic wave can be engineered to increase in power by using a larger cluster. It is shown that ejection/ desorption of adsorbate m...
متن کاملThermal Desorption in Pure Hexane and Hexane/Butane Mixtures on Graphite
The results of an extensive study of desorption in hexane (monolayer and submonolayer) and hexane/butane mixtures initially adsorbed onto the graphite basal plane is presented. Molecular dynamics (MD) simulations are utilized to carry out atomistic simulations at temperatures 300≤T≤700 for all three cases studied. Results from submonolayer and monolayer hexane indicate that the desorption energ...
متن کاملAnalysis of human breath samples using a modi ed thermal desorption: gas chromatography electrospray ionization interface
A two-stage thermal desorption/secondary electrospray ionisation/time-of-flight mass spectrometry for faster targeted breath profiling has been studied. A new secondary electrospray ionisation (SESI) source was devised to constrain the thermal desorption plume and promote efficient mixing in the ionization region. Further a chromatographic pre-separation stage was introduced to suppress interfe...
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ژورنال
عنوان ژورنال: SHINKU
سال: 1986
ISSN: 0559-8516,1880-9413
DOI: 10.3131/jvsj.29.266