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14 Jun 1999

Volume 74, Issue 24, pp. 3595-3737

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Graphite lattice synthesis catalyzed by chromium-containing crystallites

Fumio Okuyama, Tatsuji Hayashi, and Yasutaka Fujimoto

Appl. Phys. Lett. 74, 3726 (1999); http://dx.doi.org/10.1063/1.123234 (3 pages) | Cited 4 times

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The encapsulation of chromium-containing crystallites in carbon nanocages is shown to occur on glow-discharge anodes in the presence of an ac magnetic field. These encapsulants catalytically promote the synthesis of nanodimensional graphite lattices in their nearby free space as well as on their surface. The minimum unit of graphite crystals thus synthesized is “rail-like,” with a spacing somewhat larger than the (002) spacing of graphite. © 1999 American Institute of Physics.
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61.48.-c Structure of fullerenes and related hollow and planar molecular structures
81.05.ub Fullerenes and related materials
82.65.+r Surface and interface chemistry; heterogeneous catalysis at surfaces

Imposed layer-by-layer growth by pulsed laser interval deposition

Gertjan Koster, Guus J. H. M. Rijnders, Dave H. A. Blank, and Horst Rogalla

Appl. Phys. Lett. 74, 3729 (1999); http://dx.doi.org/10.1063/1.123235 (3 pages) | Cited 57 times

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Pulsed laser deposition has become an important technique to fabricate novel materials. Although there is the general impression that, due to the pulsed deposition, the growth mechanism differs partially from continuous physical and chemical deposition techniques, it has hardly been used. Here, we will introduce a growth method, based on a periodic sequence: fast deposition of the amount of material needed to complete one monolayer followed by an interval in which no deposition takes place and the film can reorganize. This makes it possible to grow in a layer-by-layer fashion in a growth regime (temperature, pressure) where otherwise island formation would dominate the growth. © 1999 American Institute of Physics.
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81.15.Fg Pulsed laser ablation deposition
68.55.-a Thin film structure and morphology
81.05.Je Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)

Control of morphology changes in self-assembled Mn-based nanostructures overgrown with mismatched material

A. Bonanni, H. Seyringer, H. Sitter, D. Stifter, and K. Hingerl

Appl. Phys. Lett. 74, 3732 (1999); http://dx.doi.org/10.1063/1.123236 (3 pages) | Cited 4 times

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Reproducibility of size and shape for epitaxially grown self-assembling Mn-based nanostructures was achieved by tracing the formation process via reflectance difference spectroscopy. Pure Mn crystallites were at first fabricated on a CdTe(001) Te-terminated surface and, in a second stage, a variety of well-controlled strain-induced island morphologies was obtained with the deposition of semiconducting materials on the magnetic precursors. © 1999 American Institute of Physics.
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81.07.-b Nanoscale materials and structures: fabrication and characterization
61.46.-w Structure of nanoscale materials
78.66.Bz Metals and metallic alloys

Detection of ultrasound using an apertureless near-field scanning optical microscope

David W. Blodgett and James B. Spicer

Appl. Phys. Lett. 74, 3735 (1999); http://dx.doi.org/10.1063/1.123237 (3 pages) | Cited 1 time

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A method for the detection of ultrasonic vibrations using the apertureless near-field scanning optical microscope (ANSOM) is presented. Due to the changes in tip-sample separation, ultrasonic vibrations are seen as perturbations on the near-field signal. Both contact transducer (5 MHz) and laser-generated ultrasound have been successfully transduced. The linear dependence of the near-field signal on tip-sample separation makes the interpretation of these wave forms similar to that for conventional ultrasonic techniques. © 1999 American Institute of Physics.
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43.35.Yb Ultrasonic instrumentation and measurement techniques
43.58.-e Acoustical measurements and instrumentation
07.79.Fc Near-field scanning optical microscopes
43.38.Zp Acoustooptic and photoacoustic transducers
43.35.Ud Thermoacoustics, high temperature acoustics, photoacoustic effect
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