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In This Issue
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Optimizing
Your PC Hardware for DSV Recording Part I
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Optimizing
Your PC Hardware for DSV Recording Part II
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TEM
Sample Preparation of Irradiated GaN on a Sapphire Substrate
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The importance of the specimen support film for cryo
TEM
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3View:
A New Perspective for Cell Biologists
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Phase identification and mapping based on valency loss EELS and ELNS
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.Need-to-KNOW
information on microscopy applications
Issue
15 April 2007
Optimizing
Your PC Hardware for DSV Recording
Part I. Digital Streaming
Video v.s. Analog Video
By Bill Mollon, Digital
Imaging Product Manager, Gatan, Pleasanton,
CA
In our December 2005 issue of KnowHow we introduced
the DigitalMicrograph plug-in called Digital
Streaming Video (DSV). The digital video stream
as it is delivered by the DVCapture module within
DM is intended to be used by another software
program. Digital Micrograph merely acts as the
supplier of the digital stream. It is up to
the end-user to utilize other 3rd party mastering
or authoring programs to capture and create
“movies” from the stream. Movie
creation in itself has many controllable variables
that will affect the final output. Some are
software related and others are highly dependent
on the hardware being used. Namely, the PC and
its components should be carefully considered
when movie recording and creation is part of
your application needs.
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| This article will go over the areas you should be aware of
to optimize your hardware system for DSV recording....
Click here to read on. |
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Optimizing
Your PC Hardware for DSV Recording
Part
II. Recording Parameters Procedure (DigitalMicrograph)
Now that the hardware components
have been identified and optimized you will need
to make sure there is a proper “match”
between the hardware and software settings within
DigitalMicrograph. Use the following steps to
setup your recording session: .... Click here to read
on.
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TEM
Sample Preparation of Irradiated GaN on a Sapphire
Substrate
By Prashanth Prasad,
Materials Applications Engineer, Gatan, Pleasanton,
CA
For much
of the past decade, GaN has been a subject of
extensive research due to very important technological
applications of this material. Current applications
of GaN include light-emitting diodes (LED's),
laser diodes, UV detectors, and microwave power
and ultra-high power switches. In the fabrication
of such GaN-based devices, ion bombardment represents
a very attractive tool for several technological
steps, electrical and optical selective-area
doping, dry etching, electrical isolation, quantum
well intermixing, and ion-cut.
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| Successful applications of ion implantation depend
on understanding the production and annealing
of radiation damage. In this regard, transmission
electron microscopy (TEM) plays a pivotal role.
Consequently, preparation of good TEM samples
is paramount in the detailed studies of ion implantation
damage in GaN. Thus, knowledge of appropriate
TEM sample preparation techniques is not only
important for investigating fundamental defect
processes in solids under ion bombardment but
also essential for the fast developing GaN industry.
... Click here to read on. |
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The
importance of the specimen support film for
cryo TEM
By Linda
Melanson, Life Science Applications Specialist,
Gatan, Pleasanton, CA
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| An important
factor that limits high resolution cryo TEM data
collection is the preparation of the specimen.
An important aspect of specimen preparation is
the carbon support film to which the specimen
is applied prior to plunge freezing in liquid
ethane; surface charge, uniformity in thickness,
planarity, and hole size and spacing all play
a part in successful cryo preparation ... Click here to read on. |
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3View:
A New Perspective for Cell Biologists
By Christel Genoud
and Simon Galloway, Gatan UK
3View is a new product and
technique from Gatan which is set to revolutionize
microscopy in many fields. This is due to the
relative ease with which high spatial resolution
ultrastructure can be obtained from extensive
volumes. The prototype for 3View (SBFSEM, serial
block face imaging in the SEM) developed by
Denk and Horstmann1 at MPI Heidelberg has pushed
the spatial extent, and acquisition speed of
3D ultrastructure at relatively high spatial
resolution. Furthermore, unlike other techniques
the resolution in the Z direction can be close
to the X,Y resolution, and it does not degrade
with depth. As the technique is largely compatible
with accepted EM specimen preparation for biological
sciences, 3View is poised to transform microscopy
in a variety of disciplines. ... Click here to read on.
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Phase
identification and mapping based on valence
loss EELS and ELNES
By Mike Kundmann
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Much of analytical TEM revolves
around elemental analysis based on core-shell
ionization and its role in electron energy-loss
spectroscopy (EELS) and energy-dispersive X-ray
spectroscopy (EDS). In these techniques, integrals
of the primary or secondary ionization signals
(typically over many tens of eV in energy) are
used to measure and map the elemental composition
of probed sample areas.. ... Click here to read on.
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Fax. (925) 463 0204 