High precision attachment of silver nanoparticles on AFM tips by dielectrophoresis.

Leiterer, Christian; Wünsche, Erik; Singh, Prabha; Albert, Jens; Köhler, Johann; Deckert, Volker; Fritzsche, Wolfgang

AFM tips are modified with silver nanoparticles using an AC electrical field. The used technique works with sub-micron precision and also does not require chemical modification of the tip. Based on the electrical parameters applied in the process, particle density and particle position on the apex of the tip can be adjusted. The feasibility of the method is proven by subsequent tip-enhanced Raman spectroscopy (TERS) measurements using the fabricated tips as a measurement probe. Since this modification process itself does not require any lithographic processing, the technique can be easily adapted to modify AFM tips with a variety of nanostructures with pre-defined properties, while being parallelizable for a potential commercial application. [Figure not available: see fulltext.]

NANOPARTICLES manufacturing; NANOMANUFACTURING; NANOSTRUCTURED material manufacturing; NANOCRYSTALS manufacturing; MICROSPHERES; MICROFABRICATION

Analytical & Bioanalytical Chemistry, 2016, Vol 408, Issue 13, p3625

1618-2642

Academic Journal

10.1007/s00216-016-9447-6