Flash desorption
WebDesorption from homogeneous, flat samples such as single crystals of metals results in "flash desorption" in which there is very little holdup between the surface and the …
Flash desorption
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WebThermal desorption is described by the Polanyi–Wigner equation derived from the Arrhenius equation. r ( σ ) = − d σ d t = v ( σ ) σ n e − E act ( σ ) / R T , {\displaystyle r(\sigma )= … WebMar 3, 1994 · Cambridge University Press, Mar 3, 1994 - Science - 586 pages 3 Reviews The book describes the physical basis of all of the principal and the majority of the more specialized techniques used today...
WebSep 8, 2003 · The (β + x)‐nitrogen structure was synthesized, so far as can be judged from its flash‐desorption spectrum, by dosing with pure nitrogen activated by electron bombardment. These results strongly suggest that the catalytic decomposition of ammonia on tungsten has as its limiting step the desorption of x‐nitrogen; ... WebFlash desorption, although still dependent upon macroscopic wire samples, has made it possible to quantitatively measure rate processes involving the transfer of molecules …
WebJun 13, 1997 · The flash desorption results show that at low coverage, the surface is enriched in I compared to Cl by a factor of 2.1 ± 0.3, and the AES results gave a ratio of 2.8 ± 0.6. These ratios confirm that the Si(111)-(7×7) surface selectively abstracts I atoms from ICl molecules and ejects Cl atoms into the gas phase. Webdesorption processes. Key words: Flash desorption, Pyrolysis, Dielectric barrier discharge ion source, Pharmaceutical, Drugs, Polymers, Explosives, Thermal decomposition, …
WebSep 27, 2006 · Flash desorption has been used to determine the values of these binding energies by heating a surface after exposure to a gas and observing the temperature at …
WebJan 1, 2013 · Flash desorption was mainly applied for the investigations of low-surface area substances such as metals. The method was later adapted for the investigations of high-surface area materials, under carrier gas … custom made gold watchWebAug 22, 2003 · Flash desorption experiments revealed for Ni(111) and Ni(100) the existence of β 1 and β 2 states, the former being only filled after completion of the β 2 … custom made glossy kitchen cabinet doorsWebThe flash-thermal desorption could reach 290 °C in 2.5 s, which could achieve efficient vaporization of nonvolatile noscapine with boiling point at 565 °C. ITMS using discontinuous atmospheric pressure interface (DAPI) has an ion utilization ratio of less than 1%, the synchronized purging for flash-thermal desorption and ion injection with ... chaucer manuscriptsWeb19 hours ago · By using a Vitrobot Mark IV (FEI), the grids were blotted for 2.5 s at 8 °C and 100% humidity, and then flash-frozen in liquid ethane cooled by liquid nitrogen after waiting for 10 s. custom made glass shower screensWebSep 8, 2003 · x‐Nitrogen flash desorption can be resolved from β‐nitrogen desorption and is found to be second order in x‐nitrogen with activation energy about 47.6 kcal/mole. When a β 15 N predose is followed by an activated 14 N dose extensive isotopic mixing occurs in both x‐ and β‐nitrogen flash desorption peaks. custom made gold jewelleryWebIn the case of flash desorption of an adsorbate from a surface obeying second order kinetics, a plot of Log ( θ o T 2 p ) vs. 1/Tp (where θ o is the initial surface coverage and Tp is the temperature of the maximum desorption rate, i.e., the “desorption temperature”) will yield a straight line, the slope of which is determined by the … chaucer meadowsWebAug 28, 2013 · In this paper, the important issue of the desorption of less- and nonvolatile compounds with minimal sample decomposition in ambient mass spectrometry is … custom made golf iron sets