India, Sept. 12 -- Scientists have uncovered how gold nanoparticles-the tiny particles that give rise to powerful optical technologies-change their behaviour when exposed to certain every day molecules like Amino Acids & Salts, paving the way towards smarter biosensors, better diagnostic tools, and even more reliable drug delivery systems.
Gold nanoparticles are special because they interact with light in unique ways. Their colour and optical response depend on whether they are alone or clustered together. When they aggregate, their optical properties modulate, which is why they are widely used in biosensors and imaging. But this property is a double-edged sword-uncontrolled aggregation can make these systems unreliable. Understanding how ...