The ability to track labeled cancer cells in vivo would allow researchers to study their distribution, growth and metastatic potential within the intact organism. Magnetic Resonance (MR) imaging is invaluable for tracking cancer cells in vivo as it benefits from high spatial resolution and absence of ionizing radiation. However, many...
Metal and bimetallic nanoparticles are of interest and are widely used in various applications because of their unique optical, electronic, and catalytic properties, which differ from those of their bulk counterparts. Better understanding of the thermodynamic and kinetic properties of nanoparticles and their underlying growth mechanisms can serve as a...
Novel materials and nanostructures with superior electro-mechanical properties are emerging in the development of novel devices. Engineering application of these materials requires accurate electro-mechanical characterization, which in turn requires development of novel experimental techniques. This dissertation outlines the investigation of the mechanical and electrical properties of one-dimensional nanomaterials.
One-dimensional nanomaterials...
Nanoscale materials are demonstrating new properties and promising applications with each passing day. The fabrication of ever more complex and precise nanomaterials represents a continuing drive in the fields of physics, chemistry, and biology. Template-based approaches provide an attractive method of producing new inaccessible materials by modifying and confining older...
X-ray Fluorescence Microscopy (XFM) is a useful technique for study of biological samples. XFM was used to map and quantify endogenous biological elements as well as exogenous materials in biological samples, such as the distribution of titanium dioxide (TiO2) nanoparticles. TiO2 nanoparticles are produced for many different purposes, including development...
Spinal cord injury occurs with a worldwide incidence of 13-33 cases per million per year, and more than 2.5 million patients worldwide suffer from spinal cord injury (SCI)-related disability (1, 2). Different methods have been attempted to promote axonal regeneration, including neurotrophin injection, hydrogel injection, olfactory ensheathing cells implantation and...
Plasmonic nanostructures are capable of trapping and confining light at the nanoscale, leading to interesting optical phenomena involving enhanced light-matter interactions. These responses arise in two forms: surface plasmon polaritons propagating on the surface of metal films and localized surface plasmons confined to the surface of metal nanoparticles. Plasmonic modes...
The projected increase in the use of nanomaterials raises concerns about adverse impacts new technologies utilizing these materials may have on the environment. These concerns can be addressed from a chemical perspective by studying how emerging nanomaterials interact with biological systems. Fundamentally, the key interactions for nanomaterial uptake into a...
The assembly of nanoscale building blocks into larger ensembles with well-defined architecture has the potential to create entirely new classes of designer photonic and plasmonic metamaterials with unique properties not found in nature. Electromagnetic metasurfaces, or 2D metamaterials, operating at optical wavelengths are of particular interest due to ease of...
Graphene oxide (GO), a product of oxidative exfoliation of graphite powders, has received significant attention due to its excellent solution dispersibility, rich functionality, and ease of conversion to chemically modified graphene (also known as œreduced graphene oxide or œr-GO). These properties make GO an attractive building block for constructing various...