The influence of complexing agent concentration on particle size in the process of SERS active silver colloid synthesis

A one-step chemical reduction route towards silver colloid particles with controllable sizes ranging from 45 to 380 nm is reported in this article. Silver particles, prepared by the reduction of [Ag(NH3)2]+ complex with various reducing sugars, were characterised by means of transmission electron microscopy (TEM), dynamic light scattering (DLS) measurement of particle size distribution, and UV-VIS spectroscopy. The concentration of ammonia in the reaction mixture and the choice of the reducing sugar are the key parameters in the control of particle size. Synthesised silver colloid particles were successfully tested for use in surface-enhanced Raman spectroscopy (SERS) with 1-methyladenine as a testing substance.

[1]  N. Jana,et al.  Growing Small Silver Particle as Redox Catalyst , 1999 .

[2]  L. Liz‐Marzán,et al.  Evidence of an aggregative mechanism during the formation of silver nanowires in N,N-dimethylformamide , 2004 .

[3]  E. Coronado,et al.  The Optical Properties of Metal Nanoparticles: The Influence of Size, Shape, and Dielectric Environment , 2003 .

[4]  Yang Wang,et al.  Approach to Single Molecule Detection Using Surface-Enhanced Resonance Raman Scattering (SERRS): A Study Using Rhodamine 6G on Colloidal Silver , 1995 .

[5]  M. Ishikawa,et al.  Single-Molecule Imaging and Spectroscopy Using Fluorescence and Surface-Enhanced Raman Scattering , 2002, Journal of biological physics.

[6]  P. Debenedetti,et al.  Reversible work of formation of an embryo of a new phase within a uniform macroscopic mother phase , 1998 .

[7]  M. Fleischmann,et al.  Raman spectra of pyridine adsorbed at a silver electrode , 1974 .

[8]  A. Henglein.  Nanoclusters of semiconductors and metals colloidal nano-particles of semiconductors and metals : Electronic structure and processes , 1997 .

[9]  Santiago Sánchez-Cortés,et al.  Growth of Silver Colloidal Particles Obtained by Citrate Reduction To Increase the Raman Enhancement Factor , 2001 .

[10]  Duncan Graham,et al.  Evaluation of surface-enhanced resonance Raman scattering for quantitative DNA analysis. , 2004, Analytical chemistry.

[11]  Shuming Nie,et al.  Direct Observation of Size-Dependent Optical Enhancement in Single Metal Nanoparticles , 1998 .

[12]  George C. Schatz,et al.  Electrodynamics of Noble Metal Nanoparticles and Nanoparticle Clusters , 1999 .

[13]  C. Zukoski,et al.  Silver Nanoparticle Formation: Predictions and Verification of the Aggregative Growth Model , 2001 .

[14]  Egon Matijević,et al.  Preparation of monodispersed metal particles , 1998 .

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

[16]  Younan Xia,et al.  Synthesis and characterization of stable aqueous dispersions of silver nanoparticles through the Tollens process , 2002 .

[17]  S. Schneider,et al.  REPRODUCIBLE PREPARATION OF SILVER SOLS WITH UNIFORM PARTICLE SIZE FOR APPLICATION IN SURFACE‐ENHANCED RAMAN SPECTROSCOPY , 1994 .

[18]  Steven R. Emory,et al.  Screening and Enrichment of Metal Nanoparticles with Novel Optical Properties , 1998 .

[19]  Schneider,et al.  Reproducible Preparation of Silver Sols with Small Particle Size Using Borohydride Reduction: For Use as Nuclei for Preparation of Larger Particles. , 1999, Journal of colloid and interface science.

[20]  A. Blaaderen,et al.  Synthesis and Characterization of Large Colloidal Silver Particles , 2003 .

[21]  D. Meisel,et al.  Adsorption and surface-enhanced Raman of dyes on silver and gold sols , 1982 .

[22]  P. Alivisatos.  The use of nanocrystals in biological detection , 2004, Nature Biotechnology.

[23]  David N. Batchelder,et al.  Simple Chemical Method for Forming Silver Surfaces with Controlled Grain Sizes for Surface Plasmon Experiments , 2003 .

[24]  Yu Wang,et al.  Surface-enhanced Raman scattering of some water insoluble drugs in silver hydrosols. , 2003, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.