Medindia

X

New Contact Lens May Help In Non-Invasive Testing of Glucose Levels

by Bidita Debnath on  October 5, 2016 at 12:53 AM Research News   - G J E 4
A new technology is being developed by researchers that could allow non-invasive testing of glucose levels, via a contact lens that samples glucose levels in tears.
 New Contact Lens May Help In Non-Invasive Testing of Glucose Levels
New Contact Lens May Help In Non-Invasive Testing of Glucose Levels
Advertisement

Current method to monitor glucose levels involve a medication process along with a painful fingerpick blood test. Glucose is a good target for optical sensing, and can be used as an alternative approach, the study said.

‘Accurate monitoring of the glucose level in human tears by employing a contact-lens-type sensor can be an alternative approach for non-invasive glucose monitoring.’
Advertisement
"It should be noted that glucose is present not only in the blood but also in tears, and thus accurate monitoring of the glucose level in human tears by employing a contact-lens-type sensor can be an alternative approach for non-invasive glucose monitoring," said Wei-Chuan Shih, Associate Professor at University of Houston in Texas, US.

The researchers developed a tiny device built with multiple layers of gold nanowires and gold film that was produced, using solvent assisted nanotransfer printing.

This component strengthens a technique called surface-enhanced Raman scattering -- named after Indian physicist C.V. Raman, who discovered the effect first in 1928 -- which gauges how light interacts with a material to determine its molecular composition, the researchers stated.

Further, the device enhances the sensing properties of the technique by creating "hot spots" or narrow gaps within the nanostructure which intensified the Raman signal.

Traditional nanofabrication techniques rely on a hard substrate -- usually glass or a silicon wafer -- but researchers wanted a flexible nanostructure which would be more suited to wearable electronics, Shih said. The layered nanoarray was produced on a hard substrate but lifted off and printed onto a soft contact, Shih said in the paper published in the journal Advanced Materials.

Although non-invasive glucose sensing is just one potential application of the technology, it provided a good way to prove the technology, he said. Moreover, the device is also an effective mechanism for using surface-enhanced Raman scattering spectroscopy.

Source: IANS
Advertisement

Post your Comments

Comments should be on the topic and should not be abusive. The editorial team reserves the right to review and moderate the comments posted on the site.
User Avatar
* Your comment can be maximum of 2500 characters
Notify me when reply is posted I agree to the terms and conditions

You May Also Like

Advertisement
View All