Transient Absorption Studies of Single Silver Nanocubes

Single silver nanocubes have been studied by transient absorption spectroscopy. The traces show clear modulations due to coherently excited vibrational modes. The average period measured in the experiments was 18.6 ± 1.7 ps, which is in excellent agreement with the calculated period for the breathing mode of the cubes. The distribution of the periods was also in a good agreement with that expected from the size distribution of the sample. The average damping time was 57.6 ± 7.4 ps, which is approximately 2 times longer than the damping time measured in ensemble studies. There is only a weak correlation between the damping times and the periods. This implies that damping is affected by the particle’s local environment and that there is significant heterogeneity in the environment.

[1]  T. Itoh,et al.  Femtosecond light scattering spectroscopy of single gold nanoparticles , 2001 .

[2]  Orla M. Wilson,et al.  Colloidal metal particles as probes of nanoscale thermal transport in fluids , 2002 .

[3]  M. Maillard,et al.  Electron-phonon scattering in metal clusters. , 2003, Physical review letters.

[4]  Younan Xia,et al.  Polyol Synthesis of Silver Nanoparticles: Use of Chloride and Oxygen to Promote the Formation of Single-Crystal, Truncated Cubes and Tetrahedrons , 2004 .

[5]  Ultrafast resonant optical scattering from single gold nanorods: Large nonlinearities and plasmon saturation , 2006 .

[6]  David R. Smith,et al.  Shape effects in plasmon resonance of individual colloidal silver nanoparticles , 2002 .

[7]  Gregory V Hartland,et al.  Coherent excitation of vibrational modes in metallic nanoparticles. , 2006, Annual review of physical chemistry.

[8]  Gregory V. Hartland,et al.  Heat Dissipation for Au Particles in Aqueous Solution: Relaxation Time versus Size , 2002 .

[9]  Younan Xia,et al.  Maneuvering the surface plasmon resonance of silver nanostructures through shape-controlled synthesis. , 2006, The journal of physical chemistry. B.

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

[11]  Younan Xia,et al.  Localized surface plasmon resonance spectroscopy of single silver nanocubes. , 2005, Nano letters.

[12]  Gregory V. Hartland,et al.  Measurements of the material properties of metal nanoparticles by time-resolved spectroscopy , 2004 .

[13]  C. Voisin,et al.  Time-resolved investigation of the vibrational dynamics of metal nanoparticles , 2000 .

[14]  Michel Orrit,et al.  A common-path interferometer for time-resolved and shot-noise-limited detection of single nanoparticles. , 2006, Optics express.

[15]  Christophe Voisin,et al.  Ultrafast Electron Dynamics and Optical Nonlinearities in Metal Nanoparticles , 2001 .

[16]  Michel Orrit,et al.  Detection of acoustic oscillations of single gold nanospheres by time-resolved interferometry. , 2005, Physical review letters.

[17]  M. Broyer,et al.  Ultrafast electron-electron scattering and energy exchanges in noble-metal nanoparticles , 2004 .

[18]  Laurent Cognet,et al.  Photothermal heterodyne imaging of individual metallic nanoparticles: Theory versus experiment , 2006 .

[19]  M. El-Sayed,et al.  Spectral Properties and Relaxation Dynamics of Surface Plasmon Electronic Oscillations in Gold and Silver Nanodots and Nanorods , 1999 .

[20]  N. Scherer,et al.  Ultrafast Resonant Dynamics of Surface Plasmons in Gold Nanorods , 2007 .

[21]  Younan Xia,et al.  Correlated Rayleigh Scattering Spectroscopy and Scanning Electron Microscopy Studies of Au-Ag Bimetallic Nanoboxes and Nanocages. , 2007, The journal of physical chemistry. C, Nanomaterials and interfaces.

[22]  Natalia Del Fatti,et al.  Femtosecond response of a single metal nanoparticle. , 2006, Nano letters.

[23]  Joseph M. McLellan,et al.  Time-resolved spectroscopy of silver nanocubes: observation and assignment of coherently excited vibrational modes. , 2007, The Journal of chemical physics.