The intention of this research was to investigate
the ink diffusion that takes place in
dip-pen nanolithography in order to better
understand how to enhance the possibilities
of nano fountain probes. Varying concentrations
of 16-mercaptohexadecanoic acid in
ethanol were used as ink in dip-pen nanolithography,
and the relationships between
contact...
Monolayers on H-Si(111) were formed thermally
using decene and 10-bromodecene.
Samples were subjected to 100 percent
humidity in order to induce oxidation for
upwards of three weeks. The ability of
bromine to bind to the Si(111) and inhibit
oxidation through steric hindrance was
intended to be analyzed. Atomic force
microscopy...
In this study liquid-phase nanolithography
(LPN) techniques using conductive atomic
force microscopy are investigated in order
to study properties of nano-patterned
organic molecules covalently bound to a
silicon substrate. Previous work has shown
that LPN in the inert organic solvent hexadecane
forms patterned features on
hydrogen-passivated Si(111). Due to hexadecane’s...
The purpose of this study was to select an
alloy with a low driving force for nucleation
for a more in-depth study of the nucleation
of γ’-precipitates. To do this, three Ni-Cr-Al
alloys were chosen close to the solvus line
of a Ni-Cr-Al phase diagram, ensuring low
supersaturation and therefore...
In this study attention was focused on a
templated fabrication of Au nanotubular
structures that could carry a highly magnetic
entity such as cobalt. In brief, experimentation
was performed to create Co@Au
core-shell nanorods of different lengths. The
preliminary core-shell structures were first
characterized using x-ray diffraction (XRD),
scanning electron...
This project focused on the growth of Cu2O
nanocubes in microwells from nanoparticle
“seeds.” The seeds were first formed by the
reduction of copper sulfate with ascorbic
acid in the presence of the surfactant
poly(ethylene glycol) (PEG). Upon reaction
within the microwell, the seed solution
formed a larger single crystal....
The performance of mixed-phase TiO2 was observed in an effort to test its practical use as
a semiconductor photocatalyst. Synthesis of mixed-phase TiO2, characterization using xray
diffraction analysis, monitoring testing using the gas chromatography-FID, and
testing gas phase reactor were four techniques used in this research to evaluate mixedphase
TiO2....
Chemical vapor deposition was used to
synthesize CdS nanowires via the vaporliquid-solid
growth mechanism. After Ti/Au
contacts were patterned to the nanowires
using electron beam lithography, photoresponse
studies were conducted. A significant
response was observed when the
wires were exposed to visible light; this
occurred as electrons in the nanowires...
This paper explores the various approaches
to time-resolved single nanoparticle spectroscopy.
Due to the novelty of these types
of experiments, several difficulties arise in
creating a feasible physical setup capable
of imaging single nanoparticles less than
100 nm in size. The various difficulties in
setup and their attempted resolutions will...
The optical properties of spherical gold
nanoparticles are calculated using classical
electrodynamics. The wavelength corresponding
to maximum extinction shifts to
longer wavelengths as the size of the
nanoparticle is increased. The influence of
higher-order multipoles is evident for large
nanoparticles, making the spectra more
complex. When the shell thickness of...