Surface Enhanced Fluorescent Nanotags
NanoComposixâs fluorescent nanotags are made up of a plasmonic silver or gold nanoparticle surrounded by a silica shell containing a fluorophore. Tuning the optical properties of the metal core and the fluorophore and engineering the placement of the dye within the silica shell significantly increases the brightness of the nanotags through a process known as surface enhanced fluorescence (SEF). The SEF nanotags can be engineered to provide bright, stable fluorescence throughout the visible and near-IR spectrum, and the silica shell can be functionalized to provide compatibility with different solvents and composites, or for biological targeting applications. Our SEF nanotags are approximately the same size as other commercial particles, but generate between 6Ã and 30Ã the brightness!
See our Knowledge Base article for more information on Surface Enhanced Fluorescence, our custom fabrication capabilities, and to compare our SEF nanotags with other commercially available fluorescent colloidal particles.
NanoComposix SEF nanotags are optimized for green and red emission.
- Green-emitting fluorescent nanotags use 70 nm diameter silver cores with a silica shell containing Fluorescein (488 nm excitation/515 nm emission), and have an overall diameter of approximately 100 nm.
- Red-emitting fluorescent nanotags use 80 nm diameter silver cores with a silica shell containing Rhodamine (555 nm excitation/578 nm emission), and have an overall diameter of approximately 120 nm.
Particles are available with bare (hydroxyl-terminated) silica or an amine-functionalized silica surface. Contact us for more information about our ability to customize size, emission properties and surface functionality for your application.