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Fig. 4 | Journal of Nanobiotechnology

Fig. 4

From: Temporally and spatially resolved molecular profiling in fingerprint analysis using indium vanadate nanosheets-assisted laser desorption ionization mass spectrometry

Fig. 4

(a) SEM image of a fingerprint sprayed with IVONSs:Sm and corresponding EDS mapping of In and V elements. (b) EDS spectra of circular regions (ridge and valley in a fingerprint) in the SEM image. (c) IVONSs:Sm-assisted LDI-MS spectra of a fingerprint in negative-ion mode. (d) MS images of the fingerprints collected from different substrates in negative-ion mode. IVONSs:Sm-assisted LDI-MS analysis for (e) SDBS and (f) RA on fingerprints. (g) IVONSs:Sm-assisted LDI-MS spectra of fresh and aged fingerprints in negative-ion mode. Proposed oxidation pathway of (h) OA and (i) AA during fingerprint storage. Scale bars in (d)~(f) represent 1 mm

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Journal of Nanobiotechnology

ISSN: 1477-3155

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