Since printed barcode lacks distributability because each barcode associated with sample cannot be divided when multiple copies of the same barcode are needed for forensic analysis, the current article reports a metamorphic barcode with desired distributability to label objects (liquids or solids) in a covert and high-fidelity manner using polymer microdots containing a panel of phase change nanoparticles (low melting point metal or alloy).
The microdots can be made with photolithography at large quantity or serial laser fabrication and have unique serialization numbers based on the melting characteristics of nanoparticles. The microdots can be distributed evenly in liquid or attached on various location of an object and decoded with differential scanning calorimeter. Incorporation of magnetic nanoparticles allows facile collection of polymer microdots with a magnet. The microdots are non-toxic and stable over one year without losing coding information and have higher large labeling capacity than other covert barcode systems. (publisher abstract modified)
Downloads
Similar Publications
- A Systematic Study of Liquid Chromatography in Search of the Best Separation of Cannabinoids for Potency Testing of Hemp-Based Products Using Diode Array Detector and Electrospray Ionization Mass Spectrometry
- Clinical characteristics of patients exposed to medetomidine in the illicit opioid drug supply in Philadelphia – a case series
- Ultrahigh Speed Direct PCR: A Method for Obtaining Y-STR and STR Based Genotypes in Under 20 Minutes