Gold nanorods are well-known nanomaterials which possess plasmon bands whose position is tunable with nanorod aspect ratio and particle size. Upon illumination, the surface plasmon leads to an intense electric field directly at the surface of the nanorod; longitudinal plasmon band excitation then induces strong electric fields at the tips of the nanorods. These results imply that surface-enhanced Raman scattering for molecules that happen to be at the tips of the rods will be far larger than for molecules on the sides of the rods. I will show that using gold nanorod@silica heterostructures with careful placement of the silica on the rod can promote binding of SERS- active analytes to the rod tips selectively, leading to stronger SERS signals in solution at lower analyte concentrations compared to silica all the way around the rods.

Anisotropic porous shells on gold nanorods: Opportunities for directed sensing

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.