Controllable colours and shapes of silver nanostructures based on pH: application to surface-enhanced Raman scattering

This paper reports for the first time that the shape of silver nanostructures on quartz slides, from a nanoprism to a nanodisc, can be easily realized within a few minutes simply by adjusting the pH value of the immersion solution. Different colours of the quartz slide covered with Ag nanostructures appeared, from deep blue to yellow, corresponding to the shapes of Ag nanostructures changing from nanoprisms to nanodiscs. Surface-enhanced Raman scattering (SERS) activities of the silver nanoprisms and nanodiscs (obtained through adjusting the pH values) were checked using p-aminothiophenol (p-ATP) as a probe molecule at both near-infrared (1064 nm) and visible light (514.5 nm) excitation. The results obtained further confirmed the enhancement mechanism of SERS based on the coupling between the surface plasmon resonance (SPR) of the substrates and the laser excitation wavelength. This work will be of great significance in understanding the SERS enhancement mechanism and in the fabrication of nanoparticle films for biosensing.

[1]  M. Tsuji,et al.  Rapid synthesis of silver nanostructures by using microwave-polyol method with the assistance of Pt seeds and polyvinylpyrrolidone , 2007 .

[2]  Dingsheng Wang,et al.  Shape-dependent catalytic activity of silver nanoparticles for the oxidation of styrene. , 2006, Chemistry, an Asian journal.

[3]  Joseph M. McLellan,et al.  Facile synthesis of gold-silver nanocages with controllable pores on the surface. , 2006, Journal of the American Chemical Society.

[4]  E. Wang,et al.  Surface-enhanced Raman scattering of silver-gold bimetallic nanostructures with hollow interiors. , 2006, The Journal of chemical physics.

[5]  Luis M. Liz-Marzán,et al.  Silica-Coating and Hydrophobation of CTAB-Stabilized Gold Nanorods , 2006 .

[6]  E. Wang,et al.  Surface enhanced Raman scattering of p-aminothiophenol self-assembled monolayers in sandwich structure fabricated on glass. , 2006, The Journal of chemical physics.

[7]  X. Gu,et al.  Shape controlled growth of gold nanoparticles by a solution synthesis. , 2005, Chemical communications.

[8]  Luis M Liz-Marzán,et al.  Aligning Au nanorods by using carbon nanotubes as templates. , 2005, Angewandte Chemie.

[9]  Yadong Li,et al.  Surface enhanced Raman scattering effects of silver colloids with different shapes. , 2005, The journal of physical chemistry. B.

[10]  Can Xue,et al.  Large-scale assembly of single-crystal silver nanoprism monolayers. , 2005, Small.

[11]  Shiyuan Ding,et al.  Preparation of silver nanoparticles by chemical reduction method , 2005 .

[12]  Anand Gole,et al.  Surface-enhanced Raman spectroscopy of self-assembled monolayers: sandwich architecture and nanoparticle shape dependence. , 2005, Analytical chemistry.

[13]  Chad A. Mirkin,et al.  Rapid Thermal Synthesis of Silver Nanoprisms with Chemically Tailorable Thickness , 2005 .

[14]  P. He,et al.  Electrochemical deposition of silver in room-temperature ionic liquids and its surface-enhanced Raman scattering effect. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[15]  M. Pileni,et al.  Collections of copper nanocrystals characterized by different sizes and shapes: Optical response of these nanoobjects , 2004 .

[16]  D. Roy,et al.  Reflection and Absorption Techniques for Optical Characterization of Chemically Assembled Nanomaterials , 2004 .

[17]  Younan Xia,et al.  Mechanistic study on the replacement reaction between silver nanostructures and chloroauric acid in aqueous medium. , 2004, Journal of the American Chemical Society.

[18]  Zhilin Yang,et al.  Surface-enhanced Raman scattering in the ultraviolet spectral region: UV-SERS on rhodium and ruthenium electrodes. , 2003, Journal of the American Chemical Society.

[19]  M. Ishikawa,et al.  Local electric field and scattering cross section of Ag nanoparticles under surface plasmon resonance by finite difference time domain method , 2003 .

[20]  Younan Xia,et al.  One‐Dimensional Nanostructures: Synthesis, Characterization, and Applications , 2003 .

[21]  C. Murphy.  Nanocubes and Nanoboxes , 2002, Science.

[22]  Younan Xia,et al.  Shape-Controlled Synthesis of Gold and Silver Nanoparticles , 2002, Science.

[23]  Thomas E Mallouk,et al.  Nanowires as building blocks for self-assembling logic and memory circuits. , 2002, Chemistry.

[24]  C. Mirkin,et al.  Nanoparticles with Raman spectroscopic fingerprints for DNA and RNA detection. , 2002, Science.

[25]  R. V. Van Duyne,et al.  A nanoscale optical biosensor: sensitivity and selectivity of an approach based on the localized surface plasmon resonance spectroscopy of triangular silver nanoparticles. , 2002, Journal of the American Chemical Society.

[26]  Latha A. Gearheart,et al.  Anisotropic Chemical Reactivity of Gold Spheroids and Nanorods , 2002 .

[27]  Catherine J. Murphy,et al.  CONTROLLING THE ASPECT RATIO OF INORGANIC NANORODS AND NANOWIRES , 2002 .

[28]  David R. Smith,et al.  Plasmon resonances of silver nanowires with a nonregular cross section , 2001 .

[29]  Yiying Wu,et al.  Superconducting MgB2 Nanowires , 2001 .

[30]  Xu,et al.  Electromagnetic contributions to single-molecule sensitivity in surface-enhanced raman scattering , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[31]  Edgar Voges,et al.  Analysis of plasmon resonance and surface-enhanced Raman scattering on periodic silver structures , 2000 .

[32]  Masayuki Nogami,et al.  Field enhancement effect of small Ag particles on the fluorescence from Eu3+-doped SiO2 glass , 1999 .

[33]  A. Campion,et al.  Surface-enhanced Raman scattering , 1998 .