Combination of electrospray deposition technology of TiO2 nanoparticles and MALDI FTICR MSI for identification of fingerprint morphology and latent components

Hui Yang; Shilei Li; Qian Zhang; Zhenpeng Wang; Na Li; Chao Han; Qing Huo; Zhenwen Zhao

doi:10.1016/j.talanta.2019.02.007

Combination of electrospray deposition technology of TiO₂ nanoparticles and MALDI FTICR MSI for identification of fingerprint morphology and latent components

Talanta. 2019 Jun 1:198:310-315. doi: 10.1016/j.talanta.2019.02.007. Epub 2019 Feb 4.

Authors

Hui Yang¹, Shilei Li², Qian Zhang³, Zhenpeng Wang⁴, Na Li¹, Chao Han¹, Qing Huo³, Zhenwen Zhao⁵

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing Mass Spectrum Center, Beijing 100190, China; Graduate School, University of Chinese Academy of Sciences, Beijing, China.
² Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing Mass Spectrum Center, Beijing 100190, China; China Meat Research Center, 100068 Beijing, China.
³ College of Biochemistry Engineering, Beijing Union University, Beijing 100023, China.
⁴ Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing Mass Spectrum Center, Beijing 100190, China.
⁵ Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing Mass Spectrum Center, Beijing 100190, China; Graduate School, University of Chinese Academy of Sciences, Beijing, China. Electronic address: zhenwenzhao@iccas.ac.cn.

PMID: 30876566
DOI: 10.1016/j.talanta.2019.02.007

Abstract

In fingerprint recognition, besides the physical shape information afforded by fingerprint enhancement techniques (FET), in recent years, more and more efforts are focused on researching the chemical composition of a fingerprint residue. In this work, electrospray deposition method was elaborately used to softly and homogenously deposit the physical enhancers of FET, TiO₂ nanoparticles (TiO₂ NPs), onto fingerprints. The results showed that this type of deposition was nondestructive to the fingerprint morphology and provided the physical shape information containing all level features. Concurrently, the TiO₂ NPs demonstrated as a better matrix of matrix-assisted laser desorption ionization mass spectrometry imaging (MALDI MSI) for analysis and imaging of latent components in fingerprint, including endogenous substances like triacylglycerols (TAGs), diacylglycerols (DAGs) and cholesterol esters (CEs), and exogenous substances such as certain ingredients in hand lotion. The chemical compositions in fingerprint are closely related to individual metabolites and individual lifestyles, and identification of these compositions by Fourier transform ion cyclotron resonance (FTICR) MS is extremely beneficial for forensic analysis. The combinations of electrospray deposition technology of TiO₂ NPs and MALDI FTICR MSI for identification of fingerprint morphology and latent components provide dual-modes fingerprint recognition for forensic science.

Keywords: Electrospray deposition; Fingerprint recognition; MALDI FTICR MSI; Physical enhancement; TiO(2) nanoparticles.