Tuning Localized Surface Plasmon Resonance of Nanoporous Gold with a Silica Shell for Surface Enhanced Raman Scattering

We report the tuning of localized surface plasmon resonance (LSPR) of nanoporous gold (NPG) by silica coating, which also affects the surface enhanced Raman scattering (SERS) of NPG. In this study, controllable silica shell is assembled on the NPG surface, and a fully silica thin layer causes more than 50 nm red-shift of LSPR band due to dielectric medium dependence. Additionally, ~1 nm silica coated NPG film shows excellent SERS enhancement, which is due to electromagnetic coupling between ligaments and local surface plasmon field enhancement within pores, and theoretical analysis indicates that silica coating further improves the coupling effect, which demonstrates the electromagnetic origin of the tuning of SERS effect.

[1]  Denis Garoli,et al.  Nanoporous gold—Application to extraordinary optical transmission of light , 2013 .

[2]  F. Romanato,et al.  Nanoporous gold plasmonic structures for sensing applications. , 2011, Optics express.

[3]  Jaebeom Lee,et al.  Metal enhanced fluorescence on nanoporous gold leaf-based assay platform for virus detection. , 2014, Biosensors & bioelectronics.

[4]  Yoshio Kobayashi,et al.  Silica coating of silver nanoparticles using a modified Stober method. , 2005, Journal of colloid and interface science.

[5]  B. Das,et al.  Alumina coating of ultrafine nanoporous gold at room temperature and their optical properties , 2009 .

[6]  Francesco De Angelis,et al.  Fractal-Like Plasmonic Metamaterial with a Tailorable Plasma Frequency in the near-Infrared , 2018, ACS Photonics.

[7]  Takeshi Fujita,et al.  Three-dimensional morphology of nanoporous gold , 2008 .

[8]  Hongkai Wu,et al.  Nanoporous gold based optical sensor for sub-ppt detection of mercury ions. , 2013, ACS nano.

[9]  R. Blaikie,et al.  Surface-plasmon-enhanced light transmission through planar metallic films , 2006 .

[10]  K. Malek,et al.  SERS imaging of silver coated nanostructured Al and Al2O3 substrates. The effect of nanostructure , 2014 .

[11]  Lei Zhang,et al.  Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis. , 2016, Nano letters.

[12]  Jian Zi,et al.  Localized surface plasmon resonance of nanoporous gold , 2011 .

[13]  L. Liz‐Marzán,et al.  Templated Growth of Surface Enhanced Raman Scattering-Active Branched Gold Nanoparticles within Radial Mesoporous Silica Shells , 2015, ACS nano.

[14]  M. Eich,et al.  Effective medium model for the spectral properties of nanoporous gold in the visible , 2014 .

[15]  Takeshi Fujita,et al.  Surface enhanced Raman scattering of nanoporous gold: Smaller pore sizes stronger enhancements , 2007 .

[16]  Francesco De Angelis,et al.  Nanoporous gold leaves: preparation, optical characterization and plasmonic behavior in the visible and mid-infrared spectral regions , 2015 .

[17]  B. Das,et al.  Nanoporous gold–alumina core–shell films with tunable optical properties , 2010, Nanotechnology.

[18]  Akihiko Hirata,et al.  Wrinkled nanoporous gold films with ultrahigh surface-enhanced Raman scattering enhancement. , 2011, ACS nano.

[19]  Matthew C. Dixon,et al.  Preparation, structure, and optical properties of nanoporous gold thin films. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[20]  T. Fujita,et al.  Tailored nanoporous gold for ultrahigh fluorescence enhancement. , 2011, Physical chemistry chemical physics : PCCP.

[21]  Ivan Gorelikov,et al.  Single-step coating of mesoporous silica on cetyltrimethyl ammonium bromide-capped nanoparticles. , 2008, Nano letters.

[22]  Takeshi Fujita,et al.  Size dependence of molecular fluorescence enhancement of nanoporous gold , 2010 .

[23]  Zhong Lin Wang,et al.  Shell-isolated nanoparticle-enhanced Raman spectroscopy , 2010, Nature.

[24]  D. Garoli,et al.  Boosting infrared energy transfer in 3D nanoporous gold antennas. , 2017, Nanoscale.

[25]  P. Guan,et al.  Characteristic Length and Temperature Dependence of Surface Enhanced Raman Scattering of Nanoporous Gold , 2009 .

[26]  Dong Wang,et al.  Plasmonic nanosponges , 2018 .

[27]  Thomas R Huser,et al.  Surface-enhanced Raman scattering on nanoporous Au , 2006 .

[28]  Mingwei Chen,et al.  Single molecule detection from a large-scale SERS-active Au79Ag21 substrate , 2011, Scientific reports.

[29]  Jian-Feng Li,et al.  Core-Shell Nanoparticle-Enhanced Raman Spectroscopy. , 2017, Chemical reviews.

[30]  K. Stine,et al.  Nanoporous metals by alloy corrosion: Bioanalytical and biomedical applications , 2018, MRS bulletin.

[31]  Luyang Chen,et al.  Surface-Enhanced Raman Scattering of Silver@Nanoporous Copper Core−Shell Composites Synthesized by an In Situ Sacrificial Template Approach , 2009 .

[32]  Mingwei Chen,et al.  Single quantum dot fluorescence enhancement by tunable nanoporous gold , 2012, 2012 12th IEEE International Conference on Nanotechnology (IEEE-NANO).

[33]  Tza-Huei Wang,et al.  Large Enhancement of Quantum Dot Fluorescence by Highly Scalable Nanoporous Gold , 2014, Advanced materials.

[34]  Jonah Erlebacher,et al.  Nanoporous Gold Leaf: “Ancient Technology”/Advanced Material , 2004 .