Femtosecond laser near-field ablation from gold nanoparticles

Short-pulse laser ablation is promising owing to the low threshold for material removal from surfaces. In the laser-ablation process, solid material transforms into a volatile phase initiated by a rapid deposition of energy. Explosive boiling can be one of the mechanisms in which matter is heated close to the critical point. Other pathways of non-thermal excitation will be present for very short laser pulses1. Here we observe a different channel of ablation from gold nanoparticles, which takes place below the particle melting point. This process is induced by the optical near-field, a subwavelength field enhancement close to curved surfaces, in particular. Using picosecond X-ray scattering, we can track the temporal and energetic structural dynamics during material ejection from the nanoparticles. This effect will limit any high-power laser manipulation of nanostructured surfaces, such as surface-enhanced Raman measurements2 or plasmonics with femtosecond pulses.

[1]  Roger Kelly,et al.  Critical assessment of thermal models for laser sputtering at high fluences , 1995 .

[2]  H. Padmore,et al.  Metal-insulator transitions in an expanding metallic fluid: particle formation kinetics. , 2003, Physical review letters.

[3]  J. K. Chen,et al.  Modelling of ultrashort laser ablation of gold films in vacuum , 2003 .

[4]  G. Fournet,et al.  Small‐Angle Scattering of X‐Rays , 1956 .

[5]  Amin Abdolvand,et al.  Femtosecond laser assisted production of dichroitic 3D structures in composite glass containing Ag nanoparticles , 2005 .

[6]  M. Tsuji,et al.  Preparation of nano-size particles of silver with femtosecond laser ablation in water , 2003 .

[7]  G. Seifert,et al.  Ultrashort laser pulse induced deformation of silver nanoparticles in glass , 1999 .

[8]  A. Henglein,et al.  Size dependent properties of Au particles: Coherent excitation and dephasing of acoustic vibrational modes , 1999 .

[9]  A. Miotello,et al.  Laser-induced phase explosion: new physical problems when a condensed phase approaches the thermodynamic critical temperature , 1999 .

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

[11]  R. Stafford,et al.  Nanoshell-mediated near-infrared thermal therapy of tumors under magnetic resonance guidance , 2003, Proceedings of the National Academy of Sciences of the United States of America.

[12]  G. Mie.  Beiträge zur Optik trüber Medien, speziell kolloidaler Metallösungen , 1908 .

[13]  Chang,et al.  Field evaporation between a gold tip and a gold surface in the scanning tunneling microscope configuration. , 1994, Physical review letters.

[14]  Brent C. Stuart,et al.  Optical ablation by high-power short-pulse lasers , 1996 .

[15]  Christian Dahmen,et al.  Laser-induced heating and melting of gold nanoparticles studied by time-resolved x-ray scattering , 2004 .

[16]  C. Haynes,et al.  Plasmonic Materials for Surface-Enhanced Sensing and Spectroscopy , 2005 .

[17]  M. El-Sayed,et al.  Shape and size dependence of radiative, non-radiative and photothermal properties of gold nanocrystals , 2000 .

[18]  J. Hillier,et al.  A study of the nucleation and growth processes in the synthesis of colloidal gold , 1951 .

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

[20]  Klaus Sokolowski-Tinten,et al.  Transient States of Matter during Short Pulse Laser Ablation , 1998 .

[21]  Baptiste Gault,et al.  Estimation of the tip field enhancement on a field emitter under laser illumination , 2005 .

[22]  Anton Plech,et al.  Thermal dynamics in laser excited metal nanoparticles , 2005 .

[23]  L. Zhigilei,et al.  Limit of overheating and the threshold behavior in laser ablation. , 2003, Physical review. E, Statistical, nonlinear, and soft matter physics.

[24]  Johannes Boneberg,et al.  Imaging optical near-fields of nanostructures , 2004 .

[25]  C. Voisin,et al.  Coherent acoustic mode oscillation and damping in silver nanoparticles , 1999 .

[26]  S. Techert,et al.  Laser-Induced Ferroelectric Structural Order in an Organic Charge-Transfer Crystal , 2003, Science.

[27]  S. Fourmaux,et al.  Non-thermal melting in semiconductors measured at femtosecond resolution , 2001, Nature.

[28]  Xunbin Wei,et al.  Selective cell targeting with light-absorbing microparticles and nanoparticles. , 2003, Biophysical journal.