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Full-Text Articles in Nanoscience and Nanotechnology

Molecular Simulations Of Assembly Of Functionalized Spherical Nanoparticles, Arezou Seifpour Jan 2013

Molecular Simulations Of Assembly Of Functionalized Spherical Nanoparticles, Arezou Seifpour

Chemical & Biological Engineering Graduate Theses & Dissertations

Precise assembly of nanoparticles is crucial for creating spatially engineered materials that can be used for photonics, photovoltaic, and metamaterials applications. One way to control nanoparticle assembly is by functionalizing the nanoparticle with ligands, such as polymers, DNA, and proteins, that can manipulate the interactions between the nanoparticles in the medium the particles are placed in. This thesis research aims to design ligands to provide a new route to the programmable assembly of nanoparticles.

We first investigate using Monte Carlo simulation the effect of copolymer ligands on nanoparticle assembly. We first study a single nanoparticle grafted with many copolymer chains ...


Morphological Control Of Copper And Cuprous Oxide Nanoparticles Via Synthesis And Oxidation/Reduction Reactions, Ryan William Mowbray Jan 2013

Morphological Control Of Copper And Cuprous Oxide Nanoparticles Via Synthesis And Oxidation/Reduction Reactions, Ryan William Mowbray

Chemical & Biological Engineering Graduate Theses & Dissertations

Morphological structure at the nanoscale dictates material properties due to size and shape dependent effects which are not present in bulk materials. In this work, novel synthetic routes are presented for the synthesis of copper nanoparticles including cubes, octahedra and platelets which could find applications in catalysis and sensing applications. In addition, intermediate morphology of copper/cuprous oxide nanoparticles during reduction by hydrogen gas are characterized by UV-Vis spectroscopy and TEM imaging. The results of the UV-Vis characterization show that nanoparticle oxide reduction occurs by a different mechanism than reduction in the bulk due to short diffusion lengths and high ...


Galvanic Porous Silicon: Processing And Characterization For Nanoenergetics, Collin R. Becker Jan 2010

Galvanic Porous Silicon: Processing And Characterization For Nanoenergetics, Collin R. Becker

Mechanical Engineering Graduate Theses & Dissertations

Porous silicon (PS) is a silicon (Si) based material composed of pores with diameters ranging from several nanometers to several micrometers. Typically PS is formed by electrochemically etching a Si wafer in a hydrofluoric acid (HF) based electrolyte. This route requires a custom built etch cell and a power supply and is difficult to integrate with the batch processing techniques of conventional Microsystems fabrication. In the first part of this work, a galvanic etching approach is used to fabricate PS in which neither a power supply nor custom etch cell are required. Galvanic etching methods are developed to fabricate thick ...