FORENSICS … Raman microscopy in the field!

• Raman: a critical law enforcement tool for characterizing gunshot residue, inks, paints, fibers, hair, drugs, explosives, fingerprints, contaminants, and other trace evidence

 

• Mobile μRaman: Lab-quality Raman microscope at the crime scene

          - Speeds analysis

          - Maintains the chain of custody

          - Increases the potential to apprehend the criminal sooner.

A

B

C

D

E

a. Crime Scene: dried semen stains on fabric

b. Remove a small section of the material containing

    the stain and place in a vial

c. Extract using water (5μl of water)

d. Place 1μl onto the SERS substrate

e. SERS substrates, ready for analysis

f. Scan (10s/scan x 4-8 scans)

g. Compare to reference library

Summary of SERS Spectra of Body Fluids

Corresponding Principal Component

Analysis

Sample Analysis:  Body Fluids

and