title: Optical properties of drug metabolites in latent fingermarks.
abstract: Drug metabolites usually have structures of split-ring resonators (SRRs), which might lead to negative permittivity and permeability in electromagnetic field. As a result, in the UV-vis region, the latent fingermarks images of drug addicts and non drug users are inverse. The optical properties of latent fingermarks are quite different between drug addicts and non-drug users. This is a technic superiority for crime scene investigation to distinguish them. In this paper, we calculate the permittivity and permeability of drug metabolites using tight-binding model. The latent fingermarks of smokers and non-smokers are given as an example.
authors.affiliation: School of Forensic Science, People's Public Security University of China, Beijing 100038, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Shen
authors.affiliation: Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Ai
mesh_terms: D003367:Cotinine / Q000032:analysis; D003878:Dermatoglyphics; D055590:Electromagnetic Phenomena; D005554:Forensic Medicine / Q000379:methods*; D006801:Humans; D004364:Pharmaceutical Preparations / Q000032:analysis*; D013499:Surface Properties
chemical_list: D004364:Pharmaceutical Preparations; D003367:Cotinine
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