Atoussa Tehrani

Atoussa Tehrani
Florida International University | FIU · Department of Electrical and Computer Engineering

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11
Publications
317
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137
Citations

Publications

Publications (11)
Article
Full-text available
The early efforts to form nanoparticles beams were characterized by unsuccessful nanoparticle formation, synthesis for only a few ''high vapor pressure'' solids, or prohibitively low deposition rates. A new type of deposition system described here overcomes these impediments and is demonstrated to produce at high rates nanostructured films of diver...
Article
While interest in nanophase films deposited in vacuum from nanoparticle beams dates back to the early 1970s, difficulties in producing such films has delayed their development and investigation of their interesting, new properties predicted. A new type of high-rate deposition system here and at a few other laboratories has overcome these impediment...
Article
We report magnetic studies on nickel nanoparticle films of average particle size of 10 nm. Magnetization as a function of field and temperature show that the system behaves like a random magnet with a strongly field-dependent irreversible temperature, below which the magnetization relax logarithmically with time. The effective barrier extrapolated...
Article
Only a few films have been deposited from nanoparticle beams in spite of interest dating back to the early 1970s. Early attempts did not condense, could only condense a few high vapor pressure solids, or were so low rate as to make growth too slow to be of use. A new type of high-rate deposition system overcomes these impediments. Deposits have bee...
Article
Full-text available
Although thin films formed from beams of nanoparticles or clusters have been discussed since the early 1970s, the question of the usefulness of this method has remained open as few films of any significant thickness have been formed to date. Early attempts did not condense, could only condense a few “high vapor pressure” solids, or were so low rate...
Article
The original idea of the ionized cluster beam thin film deposition technique was based upon producing, ionizing and accelerating beams of atoms clusters from vaporized material onto a substrate in a vacuum environment using a supersonic jet source. However, the conditions and nozzles for this cluster synthesis found so far require rather high stagn...
Article
Clusters are aggregations of atoms or molecules, generally intermediate in size between individual atoms and aggregates that are large enough to be called bulk matter. Clusters can also be called nanoparticles, because their size is on the order of nanometers or tens of nanometers. A new field has begun to take shape called nanostructured materials...
Article
Thin film deposition from beams of atomic clusters, some of which are ionized and accelerated to the growing surface, was first proposed in 1972 but suffered from controversy over cluster formation conditions during the 1980s. Development of suitable cluster sources has been difficult and large clusters of zinc (about 2 000 atoms per cluster) have...
Article
Shrinkage of ultralarge scale integrated circuit design rules to below 0.5 μm is placing new demands upon thin-film interconnect, especially for filling vias in insulating material to conductors lying below. Selective area deposition which will lead to enhanced via filling is investigated here using cluster beams, with a distribution peaking at 220...
Article
We report magnetic measurements on several Cobalt nanoparticle films. At ambient temperature, the magnetization displays a well defined hystersis behavior with a coercivity field of about 100 Oe. With decreasing temperature, the nanoparticles are increasingly pinned and the magnetization substantially reduced. The blocking temperature defined from...

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