Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 24 for “"Hafnium Oxide"”.
-
Graphene supported hafnium oxide nanopores for DNA sensing
… a new solid-state nanopore sensor consisting of hafnium oxide suspended by functionalized graphene is reported along with DNA transport properties and dielectric characterization of the film in solution.
-
Ferroelectric doped hafnium oxide and its application on electronic devices
… on the ferroelectric material. Recently, doped hafnium oxide (HfO2) has garnered attention with its excellent scalability, reliability, and compatibility with the current CMOS process. This thesis introduces two research projects aimed at improving the electrical properties of …
-
High-performance metallo-dielectric photonic crystals: Design, fabrication, and testing of a practical emitter for portable thermophotovoltaic generators
… made of tantalum and conformally coated with hafnium oxide can achieve in-band emissivities up to 0.6, allowing for prototype systems with 4.4% fuel-to-electricity efficiency. Even higher in-band emissivities of 0.8-0.9 are theoretically possible using a metallo-dielectric, or filled, photonic …
-
Spectroscopic characterisation of high dielectric constant materials on semiconducting surfaces
… On silicon substrates, an in-situ analysis of hafnium oxide grown by micro e-beam deposition in an oxygen atmosphere on an ultra-thin SiO2 buffer layer was carried out using XPS and synchrotron radiation. The self-limiting growth of an interfacial hafnium silicate layer was observed and the …
-
Investigation Of High-k Gate Dielectrics And Metals For Mosfet Devices.
… high-k dielectric materials like Tantalum pent oxide (Ta2O5), Hafnium oxide (HfO2), Zirconium oxide (ZrO2) and Aluminum oxide (Al2O3) gate oxides. Higher dielectric constant may lead to high oxide capacitance (Cox), which affects the threshold voltage (VT) of the device. The working potential of …
-
Hafnium Dioxide Nanoparticle Thin Film Morphology and Reactivity with Dimethyl Methylphosphonate
… reactions that occur on the surface of hafnium dioxide. Metal oxide and metal-oxide nanoparticles have been shown to decompose organophosphonate molecules. In this study, high surface area hafnium oxide nanoparticles are synthesized via laser ablation. This creates nanoparticles that are …
-
A comparison of electrical performance analysis between nanoscale double-gate and gate-all-around nanowire mosfet
… candidates to pursue Complementary-Metal-Oxide Semiconductor scaling. When the device is scaled down, several problems arise such as the short-channel effect, excessive transistor gate leakage and power consumption. The purpose of this simulation work is to compare the performance of …
-
Environmental behavior of hafnium : the impact on the disposition of weapons-grade plutonium
… to examine the environmental behavior of hafnium and its utility as a neutron poison for the disposition of weapons-grade plutonium in Yucca Mountain. The hydrolysis of hafnium was investigated by potentiometric titration in solutions of varying ionic strength to determine the stability …
-
2D material devices for low power logic and memory applications
… with MoS2 as the channel material and doped Hafnium Oxide (HfO2) as the ferroelectric gate dielectrics were explored. The electrical characteristics revealed a ferroelectric memory window, and effects associated with ferroelectric materials such as the wake-up effect and polarization fatigue …
-
Nanolaminate coatings to improve long-term stability of plasmonic structures in physiological environments
… measurements. Accelerated in-situ tests of Hafnium Oxide/Aluminum Oxide nanolaminate shells in a mildly pH environment with temperatures akin to physiological environments emulated using PBS show greatly enhanced endurance, with stable structures that last for more than one year.
-
A drug-free theranostic approach for localized and systemic diseases via nanoparticles
… These nanoparticles are based on carbon dots and hafnium oxide which can be imaged with fluorescent imaging and CT imaging as two major imaging modalities in the clinic. The surface-modified nanoparticles were utilized in this thesis to work out the localized diseases (dental biofilm, bone …
-
Deposition and characterization of HfO₂ thin films
Hafnium Dioxide(HfO₂) thin films were deposited on glass, metal, and silicon wafer substrates using magnetron RF reactive sputtering techniques. Structure and morphology of the thin films were investigated by x-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron …
-
Characterization of Novel Pyroelectrics
… and aluminum nitride and thin films of doped hafnium oxide, as reliable data for these materials is still missing in the literature. Here, the nitride-based semiconductors show a comparable small p and temperature dependency, which is only slightly affected by the incorporated dopant, compared …
-
Tissue-equivalent and nanoparticle doped resin dosimeters
… seen in the presence of nanoparticles (gold and hafnium oxide). The spatial resolution was found to be at least 40 µm. <br/><br/>The methodologies presented here were developed in as much detail as possible so that they can be followed by radiotherapy facilities staff as well as scientists in …
-
In-situ plasmon-enhanced characterization of optically accessible ultra-thin film ferroelectric devices
… This thesis majorly concentrates on Hafnium oxide based ferroelectric and memristive materials due to their significant advantages in power consumption, high read-write speed and a well-established CMOS-compatibility compared to other non-volatile memories (NVMs). This thesis also …
-
Exploring Zirconia as a Column Packing Material
… is also focused on a proteomics study. Zirconia, hafnium oxide and titanium oxide which are some of the more promising materials currently available, can be used for the separation and analysis of phosphorylated proteins. Adenosine triphosphate, Adenosine diphosphate and Adenosine monophosphate …
-
Measurement and analysis of the resolved resonance cross sections of the natural hafnium isotopes
Hafnium is a ductile metallic element with a large neutron absorption cross section. It can be used in reactor control rods to regulate the fission process. The NEA High Priority Request List for nuclear data presents a need for improved characterisation of the hafnium cross section in the resolved …
-
Nanoporous monolayer graphene membranes for water purification : from concept to realization
… by covering intrinsic graphene defects with hafnium oxide via atomic layer deposition and large cracks with an impermeable polymer through interfacial polymerization. We found the resulting graphene membrane to exhibit selective transport behavior consistent with recent theoretical models. At …
-
HfO2 as gate dielectric on Si and Ge substrate
Hafnium oxide HfO_2 has been considered as an alternative to silicon dioxide SiO_2 in future nano-scale complementary metal-oxide-semiconductor (CMOS) devices since it provides the required capacitance at the reduced device size because of its high dielectric constant. HfO_2 films are currently …
-
MICROELECTRODE ARRAY FOR CAPACITIVE TRANSDUCTION OF RETINAL RESPONSES
… device based on capacitive coupling through hafnium oxide encapsulation of a novel 3D device architecture, advancing neural sensing technology toward long-term implantable neural interfaces. The functionalization of biosensors interfaced with neural tissue is important to ensure that the …
Page 1 of 2