2001
DOI: 10.1016/s0039-6028(00)01003-7
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Fragmentation and charge-neutralization pathways depending on molecular orientation at surfaces

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Cited by 12 publications
(6 citation statements)
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“…The dependence of fragment ion yields on photon incidence angles was measured using the rotatable TOF-MS developed in our laboratory. 7 TOF measurements were performed using pulsed soft X-rays during the single bunched operation. NEXAFS spectra were measured by recording partial electron yields (PEYs), including fluorine-KVV Auger electrons, in which case a retarding potential of 400 V was applied.…”
Section: Methodsmentioning
confidence: 99%
“…The dependence of fragment ion yields on photon incidence angles was measured using the rotatable TOF-MS developed in our laboratory. 7 TOF measurements were performed using pulsed soft X-rays during the single bunched operation. NEXAFS spectra were measured by recording partial electron yields (PEYs), including fluorine-KVV Auger electrons, in which case a retarding potential of 400 V was applied.…”
Section: Methodsmentioning
confidence: 99%
“…The above numbers are an average of six different measurements and are statistically significant in indicating that the large agglomerates break up preferentially on neutralization. Studies have shown that bipolar charging is effective in breaking covalent bonds (Fisher et al 1999;Sekiguchi et al 2000Sekiguchi et al , 2001, and therefore can disrupt hydrophobic interactions by acting as a source of activation energy to fragment and add or remove charge from agglomerated particles. Virus particles are typically transported on large carrier agglomerates (which do not consist entirely of virus particles), and bipolar charging may be able to fragment virus particles from large carriers.…”
Section: Size Distribution Of Ms2 Virion Particles and Breakup Of Aggmentioning
confidence: 99%
“…It is noteworthy that Cl + desorption probabilities in resonances ''A'' and ''B'' are highly enhanced at normal incidence and moderately enhanced at grazing incidence. In our systems studied so far [13][14][15][16][17], the resonance enhancement effect was more efficiently caused by smaller incidence angles and was observed only at the K-edges. There were slight suspicions that small angle values might be a cause of the enhancement and/or that K-shell excitation might have something to do with the enhancement effect.…”
Section: Chlorine 2s-edge D + - Cl + - and Tey-nexafs Spectramentioning
confidence: 66%
“…Such molecules, however, have only a single kind of bond, and the mechanism of state-or site-specific PSID is not yet fully understood for complicated molecules that involve plural kinds of chemical bonds and multi-elements. Only recently have complicated molecules been investigated, including condensed HCOOH [13], C 6 H 6 [14], and HCOND 2 [15]; self-assembled mono-molecular layer (SAM) films of HS(CH 2 ) 15 COOCH 3 /Au/SiO 2 [16,17], and ion-irradiated highly oriented pyrolytic graphite (HOPG) surfaces.…”
Section: Introductionmentioning
confidence: 99%