Electrolytic spray deposition was used to pattern surfaces with 2D metallic nanostructures. Spots that contain silver nanoparticles (AgNP) were created by landing solvated silver ions at desired locations using electrically floated masks
to focus the metal ions to an area as little as 20 mm in diameter. The AgNPs formed are unprotected and their aggregates can be used for surface-enhanced Raman spectroscopy (SERS). The morphology and SERS activity of the NP structures were
controlled by the surface coverage of landed silver ions. The NP structures created could be used as substrates onto which SERS samples were deposited or prepared directly on top of predeposited samples of interest. The evenly distributed hot
spots in the micron-sized aggregates had an average SERS enhancement factor of 108. The surfaces showed SERS activity when using lasers of different wavelengths (532, 633, and 785 nm) and were stable in air.
Revised: September 29, 2015 |
Published: November 10, 2014
Citation
Li A., Z. Baird, S. Bag, D. Sarkar, A. Prabhath, T. Pradeep, and R.G. Cooks. 2014.Using Ambient Ion Beams to Write Nanostructured Patterns for Surface Enhanced Raman Spectroscopy.Angewandte Chemie International Edition 53, no. 46:12528-12531. doi:10.1002/anie.201406660