Fabrication of 3D wax/silica/Ag(Au) colloidosomes as surface-enhanced Raman spectroscopy substrates based on Pickering emulsion and seed-mediated growth method of noble metal nanoparticles

As surface-enhanced Raman spectroscopy (SERS) continues developing to be a powerful analytical tool for several probes, four important aspects to make it more accessible have to be addressed: low-cost, reproducibility, high sensibility, and recyclability. Titanium dioxide nanotubes (TiO2 NTs) prepared by anodization have attracted interest in this field because they can be used as safe solid supports to deposit metal nanoparticles to build SERS substrate nanoplatforms that meet these four desired aspects. TiO2 NTs can be easily prepared and, by varying different synthesis parameters, their dimensions and specific features of their morphology can be tuned allowing them to support metal nanoparticles of different sizes that can achieve a regular dispersion on their surface promoting high enhancement factors (EF) and reproducibility. Besides, the TiO2 photocatalytic properties enable the substrate’s self-cleaning property for recyclability. In this review, we discuss the different methodological strategies that have been tested to achieve a high performance of the SERS substrates based on TiO2 NTs as solid support for the three main noble metal nanoparticles mainly studied for this purpose: Ag, Au, and Pt.

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Combined Photothermal and Surface-Enhanced Raman Spectroscopy Effect from Spiky Noble Metal Nanoparticles Wrapped within Graphene-Polymer Layers: Using Layer-by-layer Modified Reduced Graphene Oxide as Reactive Precursors

ACS Applied Materials & Interfaces ◽

10.1021/acsami.5b05463 ◽

2015 ◽

Vol 7 (34) ◽

pp. 19353-19361 ◽

Cited By ~ 27

Author(s):

Xiangming Li ◽

Yihe Zhang ◽

Yaling Wu ◽

Yang Duan ◽

Xinglong Luan ◽

...

Keyword(s):

Raman Spectroscopy ◽

Graphene Oxide ◽

Metal Nanoparticles ◽

Reduced Graphene Oxide ◽

Surface Enhanced Raman Spectroscopy ◽

Noble Metal Nanoparticles ◽

Layer By Layer ◽

Reduced Graphene ◽

Surface Enhanced ◽

Surface Enhanced Raman

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Surface-enhanced Raman scattering imaging using noble metal nanoparticles

Wiley Interdisciplinary Reviews Nanomedicine and Nanobiotechnology ◽

10.1002/wnan.1208 ◽

2013 ◽

Vol 5 (2) ◽

pp. 180-189 ◽

Cited By ~ 21

Author(s):

Andrew J. Wilson ◽

Katherine A. Willets

Keyword(s):

Raman Scattering ◽

Metal Nanoparticles ◽

Noble Metal ◽

Surface Enhanced Raman Scattering ◽

Noble Metal Nanoparticles ◽

Surface Enhanced ◽

Surface Enhanced Raman ◽

Enhanced Raman Scattering

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Finite-Size Effects and Surface-Enhanced Raman Scattering in Noble-Metal Nanoparticles

MRS Proceedings ◽

10.1557/proc-818-m5.42.1 ◽

2004 ◽

Vol 818 ◽

Author(s):

Vitaliy N. Pustovit ◽

Tigran V. Shahbazyan

Keyword(s):

Raman Scattering ◽

Metal Nanoparticles ◽

Noble Metal ◽

Finite Size ◽

Surface Enhanced Raman Scattering ◽

Noble Metal Nanoparticles ◽

Raman Signal ◽

Surface Enhanced ◽

Surface Enhanced Raman ◽

Enhanced Raman Scattering

AbstractWe study the role of a strong electron confinement on the surface-enhanced Raman scattering from molecules adsorbed on small noble-metal nanoparticles. We describe a novel enhancement mechanism which originates from the different effect that confining potential has on s-band and d-band electrons. We demonstrate that the interplay between finite-size and screening efects in the nanoparticle surface layer leads to an enhancement of the surface plasmon local field acting on a molecule located in a close proximity to the metal surface. Our calculations show that the additional enhancement of the Raman signal is especially strong for small nanometer-sized nanoparticles.

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