Surface-Enhanced Raman Spectroscopy (SERS) Study Using Oblique Angle Deposition of Ag Using Different Substrates

Abstract

The oblique angle deposition of Ag with different deposition rates and substrates was studied for surface-enhanced Raman spectroscopy (SERS) efficiency. The deposition rate for the Ag substrate with maximum SERS efficiency was optimized to 2.4 Å/s. We also analyzed the morphology of Ag nanorods deposited at the same rate on various substrates and compared their SERS intensities. Ag deposited on SiO2, sapphire, and tungsten showed straight nanorods shape and showed relatively high SERS efficiency. However, Ag deposited on graphene or plasma-treated SiO2 substrate was slightly or more aggregated (due to high surface energy) and showed low SERS efficiency.

Conversion of WO3 thin films into self-crosslinked nanorods for large-scale ultraviolet detection

“…The absorption of light or electromagnetic waves by the plasmon effect and its application are well known. 36 From the ESI S2 † displaying the UV detection performance of the amorphous thin lm, comparing the nanorods, we infer that the amorphous thin lm has a limitation in the response time and recovery. This late response time and slow recovery make it impossible to measure in real time during UV sensing.…”

Indirect Quantification of Glyphosate by SERS Using an Incubation Process With Hemin as the Reporter Molecule: A Contribution to Signal Amplification Mechanism

“…A mixture of particles of different sizes can be observed through the sample. In most of the reports of SERS substrates, the authors try to obtain monodisperse particles (Lee et al, 2019;Chen et al, 2020), but the techniques are more complicated than ours. The great advantage of the substrates of the present work is their simplicity and low fabrication cost.…”

Designed growth of porous 2D Nb2O5 with Ag nano-particles for differential detection of UV-A and UV-C

“…This is because the amount of UV light absorbed by the Ag-coated area is substantially reduced. On the other hand, the UV-A region shows a slight decrease, because UV-absorption loss is relatively low due to similar wavelength region where the plasmonic resonance of the Ag nano-particles appears [29]. Rise time is defined to be the interval for increasing from 10% to 90% of the peak current value and vice versa is defined as the decay time (See the supplementary information figure S2).…”