Chemical Visualization of Sweat Pores in Fingerprints Using GO-Enhanced TOF-SIMS

Time-of-flight secondary ion mass spectrometry (TOF-SIMS) has been used in imaging of small molecules (600 Da) and controlled drugs, and antibiotics (>700 Da) in fingerprints. Detail features of fingerprints such as the number and distribution of sweat pores in a ridge and even the delicate morph...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2017-08, Vol.89 (16), p.8372-8376
Main Authors: Cai, Lesi, Xia, Meng-Chan, Wang, Zhaoying, Zhao, Ya-Bin, Li, Zhanping, Zhang, Sichun, Zhang, Xinrong
Format: Article
Language:English
Subjects:
Alkaloids
Antibiotics
Chemistry
Crime
Drugs
Fingerprints
Firearm discharge residue
Image detection
Image enhancement
Ions
Mass spectrometry
Mass spectroscopy
Molecular ions
Molecules
Morphology
Pores
Secondary ion mass spectrometry
Spatial discrimination
Spatial resolution
Sweat
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Summary:Time-of-flight secondary ion mass spectrometry (TOF-SIMS) has been used in imaging of small molecules (600 Da) and controlled drugs, and antibiotics (>700 Da) in fingerprints. Detail features of fingerprints such as the number and distribution of sweat pores in a ridge and even the delicate morphology of one pore were clearly revealed in SIMS images of relatively high mass molecules. The detail features combining with identified chemical composition were sufficient to establish a human identity and link the suspect to a crime scene. The wide detectable mass range and high spatial resolution make GO-enhanced TOF-SIMS a promising tool in accurate and fast analysis of fingerprints, especially in fragmental fingerprint analysis.
ISSN:0003-2700
1520-6882
DOI:10.1021/acs.analchem.7b01629