Ag nanorod arrays tailored for surface-enhanced Raman imaging in the near-infrared region

Abstract

Using a dynamic oblique angle deposition technique, we demonstrate the direct formation of Ag nanorods with quasi-parallel major axes on a template layer of oxide having a strongly anisotropic surface morphology. The optical properties of the nanorods are tuned by varying the deposition conditions without any pre- or post-treatment, and the resulting Ag nanorod arrays exhibit high surface-enhanced Raman scattering (SERS) activity. In addition to high macroscopic uniformity over a large area, our nanorod arrays contain a high density of isolated nanorods. Using the optimum Ag nanorod arrays, the SERS imaging of the microdroplets of a rhodamine 6G solution is successfully demonstrated. The space resolution of the imaging is of the order of at least a few µm. These features are suitable for the SERS imaging of biomaterials.

Morphology control of tungsten nanorods grown by glancing angle RF magnetron sputtering under variable argon pressure and flow rate

“…One-dimensional nanostructural thin films, such as nanorods, fabricated by the glancing angle deposition technique (GLAD) [1][2][3][4] have shown potential applications in a wide range of technological disciplines: in the enhancement of field ionization in pyroelectric crystal D-D nuclear fusion [5], field emission [6], superhydrophobic coatings [7], photonic crystals [8], surface enhancement Raman spectroscopy SERS [9], humidity sensors [10], thermal barrier coatings [11], and solar cells [12]. The wide range of suggested applications of these nanorods is due to their high aspect ratio of surface area to volume, anisotropy, controlled porosity, and tunable morphology.…”

Display; mainly from IDW'10: Low-reflective Wire-grid Polarizers with an Absorptive Layer Formed by Glancing Angle Deposition

“…We employed glancing angle deposition technique (GLAD) to deposit the absorptive layers 8) on the wire grids. In this study, an ion beam sputtering system (IBS) was used as the source of GLAD, because IBS has a wide selectivity for deposition materials, such as composites and materials with high melting points.…”

Antibacterial effect, structural characterization, and some applications of silver chiral nano-flower sculptured thin films

“…Oblique silver nanocolumns grown using OAD method without rotation of substrate have shown surface-enhanced Raman spectra (SERS) [53] and surface-enhanced fluorescence (SEF) [54] which can give useful and desired results in detection of minute amount of chemicals and viruses. Silver chiral nano-flowers with different symmetries have also shown a high degree of enhancement in obtaining surface Raman Spectra [11].…”