Premium
Using Ambient Ion Beams to Write Nanostructured Patterns for Surface Enhanced Raman Spectroscopy
Author(s) -
Li Anyin,
Baird Zane,
Bag Soumabha,
Sarkar Depanjan,
Prabhath Anupama,
Pradeep Thalappil,
Cooks R. Graham
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201406660
Subject(s) - surface enhanced raman spectroscopy , raman spectroscopy , materials science , silver nanoparticle , ion , deposition (geology) , nanostructure , metal , spectroscopy , nanotechnology , wavelength , nanoparticle , electrolyte , metal ions in aqueous solution , analytical chemistry (journal) , chemical engineering , optoelectronics , raman scattering , chemistry , optics , electrode , metallurgy , engineering , biology , paleontology , chromatography , quantum mechanics , physics , organic chemistry , sediment
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 μm 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 10 8 . The surfaces showed SERS activity when using lasers of different wavelengths (532, 633, and 785 nm) and were stable in air.