Motion of small gold clusters in the electron microscope

Williams, Peter
June 1987
Applied Physics Letters;6/15/1987, Vol. 50 Issue 24, p1760
Academic Journal
The rapid motion of small (∼1000 atom) gold clusters observed with atomic resolution in the electron microscope is argued to be the result of brief melting events, triggered by the Auger decay of an M-shell vacancy created in a gold atom within the cluster. Each molten episode lasts ∼10 ps, too short for noticeable evaporation. The observed frequency of motion events is shown to be consistent with ionization cross sections for the gold M shell and the electron current densities employed. It is argued from the lack of observable evaporation that the steady-state temperature of the clusters is ≤1100 K, well below the melting point. The model correctly predicts the cessation of motion at a particle diameter ∼8 nm, when a single Auger decay can no longer melt the cluster.


Related Articles

  • Fabrication of Gold Nanostructures and Studies of Their Morphological and Surface Plasmonic Properties. Naorem, B.; Roy, S.; Malhotra, Y.; Srivastava, M. // Plasmonics;Jun2013, Vol. 8 Issue 2, p1273 

    We report fabrication of gold nanostructures on glass and indium tin oxide (ITO)-coated glass substrates using high fluence and highly energetic gold ions generated by hot, dense, and strongly non-equilibrium plasma. Nanodots and nanorods are observed in scanning electron microscopy (SEM) of...

  • Morphology of gold films thinned by argon ion sputter etching. Hodgkinson, Ian J.; Lemmon, Joan // Journal of Applied Physics;6/1/1990, Vol. 67 Issue 11, p6876 

    Deals with the results of a transmission electron microscope study of the morphology of gold films formed by evaporation and reported the etched by argon ion-beam sputtering. Experimental details; Results and discussion; Conclusions.

  • Direct imaging of core-shell structure in silver-gold bimetallic nanoparticles. Li, Z. Y.; Yuan, J.; Chen, Y.; Palmer, R. E.; Wilcoxon, J. P. // Applied Physics Letters;12/12/2005, Vol. 87 Issue 24, p243103 

    High-angle annular dark field imaging in the electron microscope has been exploited to reveal the internal structure of monodispersed, bimetallic gold (Au) - silver (Ag) nanoparticles of ∼4 nm diameter, prepared using a seed-growth wet chemical method and passivated with an organic layer....

  • Observation of the atomic structure of a crystal without a high-resolution electron microscope. Indenbom, V. L. // JETP Letters;9/25/97, Vol. 66 Issue 6, p448 

    It is demonstrated for the example of tetragonal tungsten bronze that it is possible, as was indicated in a previous paper [V. L. Indenbom and S. B. Tochilin, JETP Lett. 65, 252 (1995)], to resolve to within 0.2–0.3 Å the atomic columns along which electrons are channeled. The...

  • Dynamics of the tunneling contact in a tunneling microscope during a pulsed increase in the voltage between the tip and sample. Dorofeev, I. A.; Kosyev, V. Ya.; Petrukhin, A. A. // Technical Physics;Feb98, Vol. 43 Issue 2, p229 

    The current flow regime between the tip and the sample during the supply of voltage pulses of various duration, amplitude, shape, and polarity is investigated experimentally. Solid silver and films of other materials of nanometer thickness are employed as samples. It is shown that the tunneling...

  • Rate of energy dissipation of the thermal fluctuation field of the sample at the tip of a tunneling microscope. Dorofeev, I. A. // Technical Physics Letters;Feb97, Vol. 23 Issue 2, p109 

    It is shown that the rate of energy dissipation of the thermal field of a sample at the tip of a microscope is inversely proportional to the cube of the distance between tip and sample.

  • TEM and HAADF-STEM study of the structure of Au nano-particles on CeO2. Akita, Tomoki; Tanaka, Koji; Kohyama, Masanori // Journal of Materials Science;Jun2008, Vol. 43 Issue 11, p3917 

    The structure and growth process of Au particles on CeO2 were observed by the transmission electron microscope (TEM) equipped with the high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) system. The growth of Au particles on CeO2 was shown to be mainly Ostwald...

  • Friction and Shear Strength at the Nanowire–Substrate Interfaces. Yong Zhu; Qingquan Qin; Yi Gu; Zhong Wang // Nanoscale Research Letters;Feb2010, Vol. 5 Issue 2, p291 

    The friction and shear strength of nanowire (NW)–substrate interfaces critically influences the electrical/mechanical performance and life time of NW-based nanodevices. Yet, very few reports on this subject are available in the literature because of the experimental challenges involved...

  • Note: Direct measurement of the point-to-point resolution for microns-thick specimens in the ultrahigh-voltage electron microscope. Wang, Fang; Cao, Meng; Zhang, Hai-Bo; Nishi, Ryuji; Takaoka, Akio // Review of Scientific Instruments;Jun2011, Vol. 82 Issue 6, p066101 

    We report on a direct measurement method and results of the point-to-point resolution for microns-thick amorphous specimens in the ultrahigh-voltage electron microscope (ultra-HVEM). We first obtain the ultra-HVEM images of nanometer gold particles with different sizes on the top surfaces of the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics