The gyromagnetic activity of gold nanostars (NSTs) with magnetic cores can becontrolled by chemical signals, using a supramolecular approach. NSTs were functionalized with methyl viologen dication (MV2 +), then tethered onto a naphthol (Np)-coated surface using cucurbit[8]uril (CB[8]), a macrocyclic 'handcuff' that forms a stable ternary inclusion complex with MV2 + and Np in water. Increasing the C B[8] concentration causes the NSTs to become fully immobilized, but treating the bound NSTs with neurotransmitters such as dopamine restores their ability to generate gyromagnetic signals. This chemionic system provides a unique example of synthetic neurotransmission, with potential applications in the design of chemically triggered nano-mechanical devices.

Supramolecular control over the gyromagnetic activity of gold nanostars

248th National Meeting (2014)

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