DEC 24, 2020 6:00 AM PST

Novel Two-phased Particles are the Ultimate Authenticity Tag

WRITTEN BY: Daniel Duan

Counterfeit goods producers are flooding the global market with low-quality, sometimes dangerous merchandise and ripping off brand-name manufacturers. A new technique developed by a team of researchers at the Korea Advanced Institute of Science and Technology (KAIST) can add an innovative authenticity tag to counter piracy. 

Named after the two-faced Roman god Janus, the term "Janus Particles" often refer to tiny particles that possess two distinct physical properties. Its first appearance in scientific articles was used to describe glass beads with one of a hydrophilic side and a hydrophobic side.

The Korean team created their "Janus Balls" by tinkering with the optical nature of colloidal crystals. Their particles are made out of two photocurable resins by a microfluidic instrument. One of the resins contains magnetic nanoparticles and carbon black, and the other one has silica particles with a high volume fraction. 

Under normal circumstances, the particles would appear as black. When placed in a magnetic environment, their "Janus balls" would align their magnetic moment to the field and exhibit their structural colors, which allow them to act as an anti-counterfeit label.

This research is recently reported in the journal ACS Nano.

Source: ACS via Youtube

About the Author
  • Graduated with a bachelor degree in Pharmaceutical Science and a master degree in neuropharmacology, Daniel is a radiopharmaceutical and radiobiology expert based in Ottawa, Canada. With years of experience in biomedical R&D, Daniel is very into writing. He is constantly fascinated by what's happening in the world of science. He hopes to capture the public's interest and promote scientific literacy with his trending news articles. The recurring topics in his Chemistry & Physics trending news section include alternative energy, material science, theoretical physics, medical imaging, and green chemistry.
You May Also Like
JUN 28, 2021
Chemistry & Physics
A full charge in 5 minutes? Sign me up!
JUN 28, 2021
A full charge in 5 minutes? Sign me up!
A breakthrough study published in Nature describes a novel technique that can be used to peek inside lithium-ion batteri ...
AUG 17, 2021
Earth & The Environment
Air Quality Changes Throughout Lockdowns Prove Optimistic
AUG 17, 2021
Air Quality Changes Throughout Lockdowns Prove Optimistic
COVID-19 lockdowns have reduced human activities and, subsequently, a reduction in air-polluting emissions. Air quality ...
AUG 26, 2021
Chemistry & Physics
The Most Detailed Map of the Andromeda Galaxy taken by Radio Telescope
AUG 26, 2021
The Most Detailed Map of the Andromeda Galaxy taken by Radio Telescope
Sitting at 2.5 million light-years away, the Andromeda Galaxy is the closest galaxy to our own Milky Way. Since it&rsquo ...
SEP 06, 2021
Chemistry & Physics
NASA's James Webb Space Telescope is Ready for Space!
SEP 06, 2021
NASA's James Webb Space Telescope is Ready for Space!
With a long set of rigorous tests behind it, the James Webb Space Telescope (JWST), NASA’s next major space telesc ...
SEP 30, 2021
Microbiology
Malaria Parasite Seems to be Evolving to Evade Diagnostic Tests
SEP 30, 2021
Malaria Parasite Seems to be Evolving to Evade Diagnostic Tests
When health officials are trying to control a disease outbreak, diagnostic tests can be a crucial tool that provides inf ...
OCT 16, 2021
Cell & Molecular Biology
Microtubules Found to Act as Mechanosensors
OCT 16, 2021
Microtubules Found to Act as Mechanosensors
As organisms grow, live, and move through the world, they're subjected to an array of internal and external forces. Biol ...
Loading Comments...