Size-controlled Ag nanoparticle modified WO3 composite films for adjustment of electrochromic properties

Abstract Size-controllable Ag nanoparticle ultrathin films, which were fabricated by vacuum deposition method from high purity Ag wire onto cleaned indium tin oxide conducting glass, have different color fabricated by variation of preparation conditions. The UV/Vis spectra showed that optical absorption peak of these Ag nanoparticle films can be tuned in a range from 457 nm to >650 nm. Scanning electron microscopy images showed that with increasing film thickness Ag particle size was larger. Ag/WO 3 composite films were prepared by cathodic electrodeposition of WO 3 onto the surface of Ag nanoparticle films. Spectroelectrochemistry and electrochromic properties of the resulting composite films were characterized. It was found that the electrochemical and electrochromatic properties of the composite films were adjustable with change the size of Ag nanoparticles in the composite films. Compared with a single component system of WO 3 , a substantial enhancement in the electroactive and electrochromic performance for the Ag embedded WO 3 composite system was clearly observed.

[1]  Hiroki Habazaki,et al.  Characterization of electrodeposited WO3 films and its application to electrochemical wastewater treatment , 2002 .

[2]  M. Giulio,et al.  Physical and structural characterization of tungsten oxide thin films for NO gas detection , 1998 .

[3]  Y. Nah,et al.  Enhanced electrochromic absorption in Ag nanoparticle embedded conjugated polymer composite films , 2007 .

[4]  M. Fantini,et al.  Multilayered composite Au-NiOx electrochromic films , 2004 .

[5]  Dunbar P. Birnie,et al.  Microstructure of laser-fired, sol-gel-derived tungsten oxide films , 1996 .

[6]  V. Sandoghdar,et al.  A single gold particle as a probe for apertureless scanning near‐field optical microscopy , 2001, Journal of microscopy.

[7]  M. Beard,et al.  Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots. , 2005, Nano letters.

[8]  Klaus Bange,et al.  Electrochromic Materials for optical switching devices , 1990 .

[9]  R. Ganeev,et al.  Pulsed laser deposition of metal films and nanoparticles in vacuum using subnanosecond laser pulses. , 2007, Applied optics.

[10]  T. He,et al.  Enhanced electrochromism of WO3 thin film by gold nanoparticles , 2001 .

[11]  D. Ganguli,et al.  Optical and electrochromic properties of sol–gel WO3 films on conducting glass , 2003 .

[12]  Stéphane Berciaud,et al.  Observation of intrinsic size effects in the optical response of individual gold nanoparticles. , 2005, Nano letters.

[13]  P. Somani,et al.  Electrochromic materials and devices: present and future , 2003, Materials Chemistry and Physics.

[14]  S. A. Agnihotry,et al.  Influence of Organic Additive on the Morphological, Electrical and Electrochromic Properties of Sol-Gel Derived WO3 Coatings , 2000 .

[15]  K. Colbow,et al.  Spray deposition and properties of electrochromic tungsten oxide films , 1986 .

[16]  P. Alsing,et al.  Electric field tuning of plasmonic response of nanodot array in liquid crystal matrix. , 2005, Nano letters.

[17]  George Chumanov,et al.  WO3 Sol–Gel Modified Ag Nanoparticle Arrays for Electrochemical Modulation of Surface Plasmon Resonance , 2003 .

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

[19]  Y. Kanno,et al.  Stable free-standing aramid resin film containing vanadium pentoxide and new colour electrochromism of the film by electrodeposition of gold , 2001 .

[20]  S. A. Agnihotry,et al.  Electrodeposited tungsten oxide films: annealing effects on structure and electrochromic performance , 2004 .

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

[22]  Igor Nabiev,et al.  Enhanced Luminescence of CdSe Quantum Dots on Gold Colloids , 2002 .

[23]  P. Yianoulis,et al.  Development of electrodeposited WO3 films with modified surface morphology and improved electrochromic properties , 2008 .

[24]  Anoop Agrawal,et al.  Microstructure and properties of sol-gel deposited WO3 coatings for large area electrochromic windows , 1993 .

[25]  Stephen R. Forrest,et al.  Long-range absorption enhancement in organic tandem thin-film solar cells containing silver nanoclusters , 2004 .

[26]  Marc D Porter,et al.  Labeled gold nanoparticles immobilized at smooth metallic substrates: systematic investigation of surface plasmon resonance and surface-enhanced Raman scattering. , 2006, The journal of physical chemistry. B.

[27]  A. Alivisatos.  Semiconductor Clusters, Nanocrystals, and Quantum Dots , 1996, Science.