Ion beam nanoengineering of surfaces for molecular detection using surface enhanced Raman scattering

Abstract

Ion beam nano engineering of surfaces is a promising way to tailor the surface properties for variety of technological applications. One of the unique applications of ion beam is to...

Nanomaterial-based surface-enhanced Raman scattering spectroscopy for sensing and diagnostics of gas molecules in environment and healthcare

“…It is based on the enhancement of Raman scattering signals of the molecules adsorbed on the surface of nanostructured SERS active substrates when the plasmon frequency is in resonance with that of the probe radiation used in the Raman spectrophotometer. 8,38,40,48,80 It could be explained by electromagnetic and chemical mechanisms, whereas electromagnetic SERS enhancement has been the most effective and highly acceptable. 38,40,42,48,80 The electromagnetic SERS mechanism is mainly due to the LSPR of noble metals, which shows a high EF due to their ease of fabrication and biocompatibility; however, there are some drawbacks when used as sole nanostructured materials in the form of powder or solutions.…”

“…8,38,40,48,80 It could be explained by electromagnetic and chemical mechanisms, whereas electromagnetic SERS enhancement has been the most effective and highly acceptable. 38,40,42,48,80 The electromagnetic SERS mechanism is mainly due to the LSPR of noble metals, which shows a high EF due to their ease of fabrication and biocompatibility; however, there are some drawbacks when used as sole nanostructured materials in the form of powder or solutions. 79,81 Recent developments demonstrate that surface nanoengineering of noble metal-based SERS active substrates and their composites with semiconductors provide better morphology with 'hot spot' nanoarchitectures that are suitable for higher Raman signals due to the synergetic effect of electromagnetic and chemical enhancement.…”

“…It is based on the enhancement of Raman scattering signals of the molecules adsorbed on the surface of nanostructured SERS active substrates when the plasmon frequency is in resonance with that of the probe radiation used in the Raman spectrophotometer. 8,38,40,48,80 It could be explained by electromagnetic and chemical mechanisms, whereas electromagnetic SERS enhancement has been the most effective and highly acceptable. 38,40,42,48,80…”

“…8,38,40,48,80 It could be explained by electromagnetic and chemical mechanisms, whereas electromagnetic SERS enhancement has been the most effective and highly acceptable. 38,40,42,48,80…”

Tailoring of the Distribution of SERS-Active Silver Nanoparticles by Post-Deposition Low-Energy Ion Beam Irradiation

“…Low-energy techniques are favorable for the formation of the structures on various substrates, owing to the reduction of the substrate heating during the synthesis, allowing the modification of the structures deposited on the substrates vulnerable to heat, such as polymers and fabrics. The modification of the plasmonic structures via low-energy ion irradiation is of recent interest [ 29 , 30 , 31 ], as this technique allows altering the structure without the amorphization or ion-beam mixing [ 28 ].…”