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Nanotechnology bears the promise of engineering at an atomic
scale--of assembling atoms in arrangements that are completely
unnatural, thereby creating materials with properties that have
never been seen before. This may sound like science fiction,
but it has been going on for more than 30 years, since the
invention of Molecular Beam Epitaxy (MBE). MBE provides a way
of growing a block of material one sheet of atoms at a time.
By mixing different types of atoms in various combinations,
it is possible to "tune" the properties of the resulting material.
For example, the laser diode in your CD player is probably made
from silicon. It shines a particular wavelength of light
based on the energy gap between the conduction and valence
bands in silicon. That same laser diode could be "tuned" to
emit a different wavelength by building it with a new material
engineered to have a different band gap.
MBE is just one technique for building materials on an atomic
scale. Many other techniques are also under investigation,
including dragging atoms via a Scanning Tunneling Microscope (STM)
tip, and Self-Assembled Monolayers (SAM).
Learn more about material science from the resources available
on this site, listed below.
More information on Material science can be found here.
Boron Nitride Nanotube Structure
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07 Oct 2011 | Publications | Contributor(s): Brian Demczyk
We have used high-resolution transmission electron microscopy to resolve the basal plane structure and chirality relationships in boron nitride nanotubes.
Comparison of strain relaxation in epitaxial Si0.3Ge0.7 films grown on Si(001) and Ge(001)
Surface and interfacial strain have been computed for SiGe thin films grown by UHVCVD,based on measurements via transmission electron microscopy and Raman spectroscopy.
Direct mechanical measurement of the tensile strength and elastic modulus of multiwalled carbon nanotubes
This work represents the first in-situ measurenment of the tensile strength of a carbon nanotuube.
Growth of Cu films on hydrogen terminated Si(lQ0) and Si(lll) surf&es
We have employed reflection high energy electron diffraction (RHEED) and high resolution transmission electron microscopy (HREM) to study Cu films grown on hydrogen terminated Si( 100) and Si( 111) …
In-situ carbon nanotube tensile test
07 Oct 2011 | Animations | Contributor(s): Brian Demczyk
This represents the first in-situ tensile test observed in a transmission electron microscope.
Interface structure and surface morphology of (Co, Fe, Ni)/Cu/Si(100) thin films
We have examined bilayer Co/Cu, Fe/Cu, and Ni/Cu films deposited by molecular-beam epitaxy on hydrogen-terminated @100# silicon substrates. Coauthors: V.M. Naik, A. Lukaszew, R. Naik, G. W. Auner
Lubrication Effects on Head-Disk Spacing Loss
The effects of lubrication thickness on the magnetic recording head-media tribology were investigated in this study.
Magnetic properties of magnetron sputtered Co-Cr thin films
The magnetic properties 01 magnetron sputtered CO-22 at.% Cr films of various thickness deposited on glass have been examined, with particular attention to the various contributions to the film …
Origin of the orientation ratio in sputtered longitudinal media
The surface morphology, thin film microstructure, and crystallography of sputtered longitudinal media were examined by atomic force and transmission electron microscopy. Coauthors: J. N. Zhou, G. …
Oxidation Behavior of CoCr Thin Films
In this work, elemental redistribution of annealed CoCr thin films has been investigated by X-ray photoelectron spectroscopy.
Experiments and Models Regarding Strain Dependent Thermal Conductivity and Strength at the Nanoscale and Microscale
22 Sep 2011 | Online Presentations | Contributor(s): Vikas Tomar
Silicon micro- and nano-structures are essential in today’s integrated circuits and sensors. The functioning and performance of such devices are highly affected by thermal properties. Due to the …
Mesoscopic Simulations of Nitromethane
22 Sep 2011 | Online Presentations | Contributor(s): Jean-Bernard Maillet
We present recent developments on the dissipative particle model that allow simulating the physico-chemical behavior of a molecular material at the mesoscale level. Several ingredients have been …
The Thermal Measurements Database
14 Sep 2011 | Databases | Contributor(s): Timothy S Fisher, Ann Christine Catlin
Experimental data for thermal materials is obtained using various test methods under a set of conditions. A measurement type can be tested using many different methods, and a single method can be …
Development of the ReaxFF reactive force fields and applications to combustion, catalysis and material failure
12 Sep 2011 | Online Presentations | Contributor(s): Adri van Duin
This lecture will describe how the traditional, non-reactive FF-concept can be extended for application including reactive events by introducing bond order/bond distance concepts. Furthermore, it …
Self-assembled Coordination Architectures: Lessons from Nature
12 Jul 2011 | Online Presentations | Contributor(s): Makoto Fujita
This lecture is part of the 28th Annual H.C. Brown Lectures in Organic Chemistry.
How to Turn Graphene into a Robust Topological Insulator Using Adatoms
12 Jul 2011 | Online Presentations | Contributor(s): Jason Alicea
In this talk I will discuss a recent proposal for generating a robust TI state in a more readily available two-dimensional system -- graphene.
CHM 696 Lecture 13: Optical Properties of Metal Nanoparticles and Nanoparticle Assemblies III
02 Jun 2011 | Online Presentations | Contributor(s): Alexander Wei
CHM 696 Lecture 14: Semiconductor Nanoparticles, Nanorods, and Nanowires: Properties and Applications I
CHM 696 Lecture 15: Semiconductor Nanoparticles, Nanorods, and Nanowires: Properties and Applications II
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