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Investigation on infrared laser desorption of solid matrix using scanning electron microscope and fast photography
Author(s) -
Fan Xing,
Wang ShouZe,
Zheng AiLi,
Wei XianYong,
Zhao YunPeng,
Zong ZhiMin,
Zhao Wei
Publication year - 2013
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.22225
Subject(s) - scanning electron microscope , materials science , optics , infrared , electron microscope , laser , photography , matrix (chemical analysis) , microscope , analytical chemistry (journal) , chemistry , physics , art , chromatography , composite material , visual arts
ABSTRACT Infrared light from a pulsed optical parametric oscillator laser system was used to irradiate succinic acid (SA), a usual solid matrix used in matrix‐assisted laser desorption ionization, under vacuum. Ablated SA particles were trapped using a silica plate mounted 3.0 mm above and parallel to the sample surface. The morphology and particle size of ablated particles at different laser fluences were investigated using a scanning electron microscope (SEM). The dynamics of plume propagation for SA desorption process was studied with fast photography at atmospheric pressure. Plume expanding at 1.12 J/cm 2 laser fluence was recorded using a high‐speed CMOS camera and corresponding propagation distance was measured. The solid matrix desorption was driven by phase explosion according to plume model fitting, which was consistent with the results of SEM. Microsc. Res. Tech. 76:744–750, 2013 . © 2013 Wiley Periodicals, Inc.