Work

Self-assembly of hard anions around cationic gold nanorods: potential structures for SERS

Year: 2024

Type: article

Abstract: in colloidal solution. The enhancement mechanism was examined first by comparison to gold nanorods stabilized by a cetyltriethylammonium bromide bilayer, cationic thiol bound polyoxometalate, and polyelectrolyte coating. Next, composites made using polyoxometalates of different atomic composition and charge were examined. It was concluded that the polyoxometalate charge had a noticeable effect on the enhancement while the atomic composition did not. Furthermore, high enhancement is observed mainly in cases where the nanorod monolayer allows the sequestration of the dye molecule into the nanoparticle's ligand layer. The proposed mechanism therefore involves the negative charge of the polyoxometalate attracting the positively charged dye, and facilitating the sequestration of the dye within the ligand bilayer, closer to the nanorod's surface.

Source: Nanoscale Advances

DOI: 10.1039/d4na00654b

Authors: Offer Zeiri, Katherine M. Hatzis, Maurea Gomez, Emily A. Cook, Maegen Kincanon, Catherine J. Murphy

Institutions: University of Illinois Urbana-Champaign, Shimon Peres Negev Nuclear Research Center

Language: English

Topic: Gold and Silver Nanoparticles Synthesis and Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,962

Funders: National Science Foundation, University of Illinois at Urbana-Champaign, Division of Materials Research, National Science Foundation Graduate Research Fellowship Program