This is the syndication feed for photonics.com: Photonics Showcase. https://www.photonics.com/Photonics_Showcase/p15 Mon, 09 Oct 2023 21:46:06 GMT Tue, 13 Jan 2015 00:00:00 GMT 1800
A laser biosensor has demonstrated a simpler way to identify DNA and biomarker proteins via changes in a solution’s surface charge density or pH.

A team from Yokohama National University developed the GaInAsP photonic crystal nanolaser biosensor, which can detect the absorption of biomolecules based on the laser’s wavelength shift and intensity. This method is potentially less expensive to perform than fluorescent tagging or spectroscopy techniques.

The researchers deposited a protective film of zirconium dioxide (ZrO2) over the device using atomic layer deposition, and then tried sensing in liquids of high or low pH and liquids containing charged polymers. The coating protects the nanolaser from damage and unwanted...]]> https://www.photonics.com/Articles/Nanolaser_Detects_Biomolecules/a57072 A57072 Tue, 13 Jan 2015 00:00:00 GMT