Silver Nanoparticles Deposited on Porous Silicon as a Surface-Enhanced Raman Scattering (SERS) Active Substrate

Silver nanoparticles were deposited spontaneously from their aqueous solution on a porous silicon (PS) layer. The PS acts both as a reducing agent and as the substrate on which the nanoparticles nucleate. At higher silver ion concentrations, layers of nanoparticle aggregates were formed on the PS surface. The morphology of the metallic layers and their SERS activity were influenced by the concentrations of the silver ion solutions used for deposition. Raman measurements of rhodamine 6G (R6G) and crystal violet (CV) adsorbed on these surfaces showed remarkable enhancement of up to about 10 orders of magnitude.

[1]  Andreas Otto,et al.  What is observed in single molecule SERS, and why? , 2002 .

[2]  Robert C. Maher,et al.  New limits in ultrasensitive trace detection by surface enhanced Raman scattering (SERS) , 2003 .

[3]  K. Kholostov,et al.  Formation of SERS-active silver structures on the surface of mesoporous silicon , 2009 .

[4]  Fabrizio Giorgis,et al.  SERS‐active substrates based on silvered porous silicon , 2009 .

[5]  L. Liz‐Marzán,et al.  Modulation of Localized Surface Plasmons and SERS Response in Gold Dumbbells through Silver Coating , 2010 .

[6]  R. Mathies,et al.  Resonance Raman cross-sections and vibronic analysis of rhodamine 6G from broadband stimulated Raman spectroscopy. , 2008, Chemphyschem : a European journal of chemical physics and physical chemistry.

[7]  F. A. Harraz,et al.  Metal Deposition onto a Porous Silicon Layer by Immersion Plating from Aqueous and Nonaqueous Solutions , 2002 .

[8]  Ying-Jie Zhu,et al.  Gold nanoclusters reductively deposited on porous silicon: morphology and electronic structures , 1998 .

[9]  Lasse Jensen,et al.  Understanding the molecule-surface chemical coupling in SERS. , 2009, Journal of the American Chemical Society.

[10]  L. Tay,et al.  SERS and the Single Molecule , 2002 .

[11]  G. Bazan,et al.  Chemically patterned microspheres for controlled nanoparticle assembly in the construction of SERS hot spots. , 2007, Journal of the American Chemical Society.

[12]  Dan Cojoc,et al.  Optimization of porous silicon preparation technology for SERS applications , 2010 .

[13]  Luke P. Lee,et al.  Surface‐Enhanced Raman Scattering of Small Molecules from Silver‐Coated Silicon Nanopores , 2003 .

[14]  Gang Wei,et al.  Synthesis of Palladium Nanoparticles and Their Applications for Surface-Enhanced Raman Scattering and Electrocatalysis , 2010 .

[15]  Steven R. Emory,et al.  Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering , 1997, Science.

[16]  Louis E. Brus,et al.  Ag Nanocrystal Junctions as the Site for Surface-Enhanced Raman Scattering of Single Rhodamine 6G Molecules , 2000 .

[17]  Nam-Jung Kim.  Physical Origins of Chemical Enhancement of Surface-Enhanced Raman Spectroscopy on a Gold Nanoparticle-Coated Polymer , 2010 .

[18]  R. V. Van Duyne,et al.  Probing the structure of single-molecule surface-enhanced Raman scattering hot spots. , 2008, Journal of the American Chemical Society.

[19]  M. Ishikawa,et al.  Microscopic morphology and SERS activity of Ag colloidal particles , 2002 .

[20]  R. Birke,et al.  A unified view of surface-enhanced Raman scattering. , 2009, Accounts of chemical research.

[21]  A. Berg,et al.  High-Density Periodic Arrays of Self-Aligned Subwavelength Nanopyramids for Surface-Enhanced Raman Spectroscopy , 2010 .

[22]  Brian E. Conway,et al.  Modern Aspects of Electrochemistry , 1974 .

[23]  Gilad Haran,et al.  Time-Dependent Single-Molecule Raman Scattering as a Probe of Surface Dynamics , 2001 .

[24]  Min Qiu,et al.  Optical Properties of Nanostructures , 2011 .

[25]  M. Moskovits.  Surface‐enhanced Raman spectroscopy: a brief retrospective , 2005 .

[26]  S. Nie,et al.  Single-Molecule and Single-Nanoparticle SERS: Examining the Roles of Surface Active Sites and Chemical Enhancement , 2002 .

[27]  A. Chiodoni,et al.  Porous silicon as efficient surface enhanced Raman scattering (SERS) substrate , 2008 .

[28]  L. Brus.  Noble metal nanocrystals: plasmon electron transfer photochemistry and single-molecule Raman spectroscopy. , 2008, Accounts of chemical research.

[29]  Louis E. Brus,et al.  Single Molecule Raman Spectroscopy at the Junctions of Large Ag Nanocrystals , 2003 .

[30]  David R. Smith,et al.  Surface-Enhanced Raman Scattering from Silver-Plated Porous Silicon , 2004 .

[31]  R. Dasari,et al.  Near‐infrared surface‐enhanced Raman scattering can detect single molecules and observe ‘hot’ vibrational transitions , 1998 .

[32]  R. Dasari,et al.  Single Molecule Detection Using Surface-Enhanced Raman Scattering (SERS) , 1997 .

[33]  N. Pesika,et al.  Use of electrochemical deposition to create randomly rough surfaces and roughness gradients. , 2011, Langmuir : the ACS journal of surfaces and colloids.

[34]  B. Pettinger,et al.  Single-molecule surface- and tip-enhanced raman spectroscopy , 2010 .

[35]  O. Seitz,et al.  Controlled Deposition of Gold Nanoparticles on Well-Defined Organic Monolayer Grafted on Silicon Surfaces , 2010 .