Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Chemical Imaging: potential new crime busting tool

A new fingerprinting technique could potentially detect the diet, race and sex of a suspected criminal, according to new research published in the August edition of the journal Analytical Chemistry.

The team, led by Professor Sergei Kazarian from Imperial College London’s Department of Chemical Engineering, has devised a technique which collects fingerprints along with their chemical residue and keeps them intact for future reference.

Chemical residues contain a few millionths of a gram of fluid and can be found on all fingerprints. Conventional fingerprinting techniques often distort or destroy vital chemical information with no easy way of lifting residues for chemical imaging, until now.

Imperial scientists found that the use of gel tapes, commercial gelatine based tape, provides a simple method for collection and transportation of prints for chemical imaging analysis.

The prints, once lifted, are analysed in a spectroscopic microscope. The sample is irradiated with infrared rays to identify individual molecules within the print to give a detailed chemical composition.

The information is then processed by an infrared array detector, originally developed by the U.S. military in smart missile technology. The array detector chemically maps the residue. This process builds up a picture, or chemical photograph, and allows for the most comprehensive information obtained from a fingerprint.

“The combined operational advantages and benefits for forensic scientists of tape lifting prints and spectroscopic imaging really maximises the amount of information one can obtain from fingerprints. Our trials show that this technique could play a significant role in the fight against crime,” said Professor Kazarian.

In many cases, this information is enough to determine valuable clues about a person beyond the fingerprint itself. It could potentially identify traces of items people came in contact with, such as gunpowder, narcotics and biological or chemical weapons.

Chemical clues could also highlight specific traits in a person. A strong trace of urea, a chemical found in urine, could indicate a male. Weak traces of urea in a chemical sample could indicate a female. Specific amino acids could potentially indicate whether the suspect was a vegetarian or meat-eater.

Professor Kazarian believes that this technique could allow forensic scientists to observe how fingerprints change in time and within different environments.

“By focussing on what is left in a fingerprint after periods of time, scientists could potentially gauge how old a crime scene is. Studying what happens to prints, when they are exposed to high temperatures, could also be particularly significant, especially in arson cases where lifting prints has been notoriously hard,” he said.

Speculating about the possible future benefits of this process, Professor Sergei Kazarian said:

“In the courtroom of the near future, chemical images could feature as key evidence. I hope our work assists law enforcement authorities to bring dangerous criminals to justice.”

Colin Smith | alfa
Further information:

More articles from Information Technology:

nachricht Fraunhofer FIT joins Facebook's Telecom Infra Project
25.10.2016 | Fraunhofer-Institut für Angewandte Informationstechnik FIT

nachricht Stanford researchers create new special-purpose computer that may someday save us billions
21.10.2016 | Stanford University

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Ice shelf vibrations cause unusual waves in Antarctic atmosphere

25.10.2016 | Earth Sciences

Fluorescent holography: Upending the world of biological imaging

25.10.2016 | Power and Electrical Engineering

Etching Microstructures with Lasers

25.10.2016 | Process Engineering

More VideoLinks >>>