Browsing Graduate Program in Materials Science and Nanotechnology - Master's degree by Issue Date
Now showing items 1-20 of 135
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Size and composition modulated superlattices of silicon based nanowires
(Bilkent University, 2008)Mechanical properties, atomic and energy band structures of bare and hydrogen passivated SinGen nanowire superlattices have been investigated by using firstprinciples pseudopotential plane wave method. Undoped, tetrahedral ... -
Size modulation and defects in graphene based ribbons : magnetism and charge confinement
(Bilkent University, 2008)In this thesis, we investigated the effects of vacancy and heterojunction formation on electronic and magnetic properties of graphene nanoribbons (GNRs) by using first principles pseudopotential plane wave method within ... -
Micro and nanostructured devices for thermal analysis
(Bilkent University, 2008)The recent advent of micro and nano devices increased the interest in small scale material properties, such as elasticity, conductivity or heat capacity, which are considerably different from their bulk counterparts due ... -
Light harvesting and efficient energy transfer in boron dipyrrin dyads and derivatization for potential utility in dye-sensitized solar cells
(Bilkent University, 2008)In bichromophoric supramolecular systems light is harvested by antenna components and excitation energy is channeled into an acceptor component. We have designed and synthesized novel energy transfer cassettes which are ... -
Coupled surface plasmon structures and applications
(Bilkent University, 2009)Surface plasmons have attracted great interest during past decades due to their unique physical properties. In this thesis, we study grating-coupled surface plasmons for sensing and filtering applications. We first present ... -
A first-principles study of defects and adatoms on silicon carbide honetcomb structures
(Bilkent University, 2009)In this thesis a study of electronic and magnetic properties of two dimensional (2D), single layer of silicon carbide (SiC) in hexagonal structure and its quasi 1D armchair nanoribbons are presented by using first-principles ... -
Design, fabrication and characterization of surface plasmon resonance based MEMS displacement sensors
(Bilkent University, 2009)Strong dependence of surface plasmon resonance (SPR) on coupling parameters offers new varieties of sensing mechanisms in nano and micro-scale engineering fields. In this study, design, fabrication and characterization ... -
Novel techniques in multi-frequency atomic force microscopy and spectroscopy
(Bilkent University, 2009)The capability of measuring material properties of nanostructures simultaneously with their size and shape is very desirable for characterization of novel materials and devices at the nanoscale Here we present two novel ... -
Applications of plasmon enhanced emission and absorption
(Bilkent University, 2009)The term plasmon-polariton is used to describe coupled modes of electromagnetic waves with electronic plasma oscillations in conductors. Surface plasmon resonances have found profound interest over the last few decades ... -
Fluorescent aerogel films for TNT sensing
(Bilkent University, 2009)Silica aerogels are unique materials with extraordinary properties such as, high porosity, large surface area and low refractive indices. Due to these properties, they can be applied to a wide range of areas including, ... -
Lasing action and supercontinuum generation in nano- and micro-structures
(Bilkent University, 2009)Supercontinuum generation is the substantial broadening of electromagnetic radiation due to nonlinear interactions with the transporting medium. It nds application in a wide range of areas, including spectroscopy, ... -
Microfluidics for plasmonic sensors
(Bilkent University, 2009)In this thesis, we integrate microfluidics with grating-coupled surface plasmon configurations for sensing applications. First, in order to observe optimal excitations, we introduce procedures for modification of the ... -
Self-nanoparticle forming immunostimulatory DNA : structure-function relationship studies
(Bilkent University, 2009)Toll-like receptors (TLRs) are one the most critical and widely studied members of the family of pattern recognition receptors expressed on innate immune cells. They recognize microbial signatures, such as bacterial/viral ... -
Non-covalently functionalized SWNTs as potential delivery agents for novel BODIPY*based PDT sensitizers & the design and synthesis of dendritic light harvesters
(Bilkent University, 2009)Photodynamic therapy (PDT) is a non-invasive method used for the treatment of a number of diseases including certain cancers and some cardiovascular diseases. Photodynamic action depends on absorbance of photosensitizer ... -
Chemically specific dynamic characterization of photovoltaic and photoconductivity effects of nanostructures by X-ray photoelectron spectroscopy
(Bilkent University, 2010)X-Ray Photoelectron Spectroscopy is a widely used characterization method for chemical analysis of surfaces. In this thesis, We report characterization of photovoltaic and photoconductivity effects on nanostructured ... -
Electrostatic effects on the self-assembly mechanism of peptide amphiphiles
(Bilkent University, 2010)Self-assembling peptide amphiphiles, synthesized through solid phase peptide synthesis – a bottom-up approach, have been used with various tissue engineering purposes. Peptide amphiphile molecules self-assemble into nanofibers, ... -
Scanning probe microscopy for optoelectronic characterization at the nanoscale
(Bilkent University, 2010)In this work, we propose methods for electrical characterization of nanostructured surfaces using electrostatic force and tunneling current measurements in scanning probe microscopy. Resolution smaller than 10 nm in ... -
Resonant optical nanoantennas and applications
(Bilkent University, 2010)Being one of the fundamentals of electrical engineering, an antenna is a metallic shape structured to transmit or receive electromagnetic waves. Thanks to the recent advances in nano fabrication and nano imaging, metallic ... -
Solid state emissive bodipy dyes with bulky substituents as spacers and a sensitive and selective ratiometric near IR fluorescent probe for zinc ions based on the distyryl-bodipy fluorophore
(Bilkent University, 2010)Dyes having solid state fluorescence are playing an important role for organic light emitting devices (OLED), optoelectronic devices and photoelectric conversion. However, emissive solids are not common because of the ... -
Enhancing light extraction efficiency of InGaN/GaN multi quantum well light emitting diodes with embedded two dimensional photonic crystal structures
(Bilkent University, 2010-08)Advance in the growth methods of III-Nitrides and researches in order to eliminate doping problems of gallium nitride (GaN) resulted in high band gap materials with increased crystal quality which have led to tremendous ...
