Secondary ion emission from solutions: time dependence and surface phenomena.
Secondary ion emission from solutions: time dependence and surface phenomena.
复制标题
溶液中的二次离子发射：时间依赖性和表面现象。
DOI：
10.1021/ac00047a030
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发表时间：
1992
影响因子：
7.4
通讯作者：
Todd,PJ
中科院分区：
文献类型：
--
作者：
Kriger,MS;Cook,KD;Short,RT;Todd,PJ
N（CH_3）_3Br，TTAB）和四乙基碘化铵（TEAI）。TTAB溶液的FAB光谱显示TTA+随时间连续减少。从TEAI溶液获得的光谱最初在几分钟内不变，然后显示TEA+的相对丰度逐渐增加到最大值，随后离子强度急剧下降。TTAB溶液液滴的二次离子图像显示TTA+和甘油二次离子的发射在整个样品中是均匀的。TEAI溶液液滴的二次离子图像显示TEA+和质子化甘油的不均匀和分离发射。从FAB光谱和二级公里图像的结果进行了相关和合理化的基础上，表面张力引起的质量传输和基质蒸发。
N (CH3) 3Br, TTAB) and tetraethylammonium Iodide (TEAI) was Investigated. FAB spectra of the TTAB solution displayed a continuous decrease In TTA+ with time. Spectra obtained from the TEAI solution were initially invariant for several minutes and then displayed a gradual Increase In the relative abundance of TEA+ to a maximum, followed by a precipitous drop In Ion Intensity. Secondary Ion images of droplets of TTAB solution showed that emission of both TTA+ and glycerol secondary Ions was homogeneous across the sample. Secondary Ion Images of droplets of TEAI solution showed heterogeneous and segregated emission of both TEA+ and protonated glycerol. Results from the FAB spectra and the secondary km Images were correlated and rationalized on the basis of surface tension-induced mass transport and matrix evaporation.