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 45 for “"graphene nanoribbons"”.
-
Characterization, stability, and transport through defects in graphene nanoribbons
Graphene nanoribbons (GNRs) constitute a new class of nanostructured materials with unique properties and significant potential for applications. During production of GNRs, defects are generally introduced within the lattice. Assessment of defects' stability and characterization of their effects on …
-
Properties of graphene nanoribbons obtained by chemical vapor deposition
… chemical vapor deposition (CVD) to synthesize graphene films on copper foil. After transferring the graphene to SiO2/Si substrates, we pattern the film into graphene nanoribbons (GNRs) of width < ~50 nm and length < ~ 700 nm with Ti/Au contacts. We perform low-bias, high-bias, and …
-
Scanning tunneling microscopy investigation of atomically precise graphene nanoribbons
… the dry contact transfer of atomically precise graphene nanoribbons onto H:Si(100) under ultra-high vacuum, detailed electronic characterization, and electron-mediated polymerization of graphene nanoribbon precursors into polyanthrylene. Detailed scanning tunneling microscopy (STM) and scanning …
-
A study on the properties of graphene nanoribbons for electronics
Graphene has the potential to lead the construction of next-generation electronics due to its high mobility, high thermal conductivity, and atomically thin two-dimensional structure. However, graphene’s intrinsic zero bandgap property restricts its use in a wide range of applications. Thus, the …
-
Electronic characterization of solution-synthesized graphene nanoribbons using scanning tunneling microscopy
… synthesis to fabricate atomically precise graphene nanoribbons (GNRs). Previous works of on-surface heterojunction GNRs and the dry contact transfer method for solution-synthesized GNRs are presented to show the current status of GNR fabrication. The electronic characterizations of the …
-
The Electrical Transport Study Of Graphene Nanoribbons And 2d Materials Beyond Graphene
… measurements on a suspended ultra-low-disorder graphene nanoribbon (GNR) with nearly atomically smooth edges that reveal a high mobility exceeding 3000 cm2 V-1 s-1 and an intrinsic bandgap was reported in this study. The experimentally derived bandgap is in quantitative agreement with the …
-
Scanning tunneling microscopy characterization and metallic nanocontacts for atomically precise graphene nanoribbons
… semiconducting material, atomically precise graphene nanoribbons (GNRs) have been predicted to show very interesting electronic properties based on their geometries and their underlying substrates. Once the ribbons are synthesized, confirmation of their geometries and investigating their …
-
Scanning tunneling microscopy and spectroscopy of wet chemical synthesized porous graphene nanoribbons in ultra-high vacuum
The student, Kaitlyn Parsons, accepted the attached license on 2018-06-29 at 12:21.
-
Scanning tunneling microscopy and spectroscopy of wet chemically synthesized porous graphene nanoribbons on hydrogen passivated silicon (100)
… synthesized atomically precise porous graphene nanoribbons (GNRs) exfoliated onto hydrogen passivated silicon H:Si(100) substrates using a dry contact transfer (DCT) method under ultrahigh-vacuum (UHV) conditions. The porous GNRs are characterized in UHV using scanning tunneling …
-
Scanning tunneling microscopy and spectroscopy of metallic features and nanocontacts for atomically precise graphene nanoribbons on silicon surface
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
-
Scanning tunneling microscopy investigations of transition metal dichalcogenide 1t-tantalum disulfide and zigzag-shape graphene nanoribbons in ultra-high vacuum
… and wet-chemically synthesized zigzag-shape graphene nanoribbons (GNRs) on hydrogen passivated silicon substrate through scanning tunneling microscopy (STM). Dry contact transfer allows unperturbed transfer and exfoliation of desired two-dimensional (2D) layered materials onto a desired …
-
Simulation of graphene electronic devices
… mid-1980s describing the formation of freeform graphene there has been an enormous growth in interest in the material. Graphene is of interest to the semiconductor industry because of the high electron mobility exhibited by the material and, as it is planar, it is compatible with silicon …
-
Experiments in Graphene and Plasmonics
Graphene nanoribbons, graphene based optical sensors, and grating based plasmonics are explored experimentally. Graphene nanoribbons exhibit highly insulating states that may allow for graphene based digital applications. We investigate the sensitivity of these states to local charged impurities in …
-
The Edge States of Epitaxial Graphene on SiC
… transport was observed in sidewall epitaxial graphene nanoribbons on SiC (SWGNRs) at room temperature. These objects are of fundamental interest as they provide a direct access to charge neutral graphene with excellent transport properties. In this thesis, beyond sidewalls, we fabricate …
-
Nanosoldering carbon nanotube fibers and graphene nanoribbon thin film transistors
… of carbon. We work with carbon nanotubes and graphene nanoribbons. The first part involves using carbon nanotubes (CNTs) to build composite structures such as fibers. In the past, our group developed the “nanosoldering” technique to solder carbon nanotube junctions which significantly improved …
-
Size Effects on Transport in Graphene
Graphene, being the first 2D material available to us, has triggered tremendous interests across a broad range of areas. For every successful demonstration of a novel graphene-based device, a question often asked is what would be changed if the dimensions of graphene are reduced? In an effort to …
-
Synthesis and chemical modification of carbon nanostructures for materials applications
… carbon nanotubes (MWCNTs), graphite, and graphene nanoribbons (GNRs). Efficient production and modification of these unique structures, each with their own distinct properties, will make them more accessible for applications in electronics, materials, and biology. A method is reported for …
-
Scanning tunneling microscopy and spectroscopy of tip-induced direct writing of nanometallization in ultra-high vacuum
… HfB2 and MgB2. We first give an introduction to graphene nanoribbons (GNRs) along with STM and the techniques therein. We found that with STM, self-standing nanoscale features including dots, wires, and 3D structures can be made. The steps required in STM nanometallization are reduced compared …
-
Interlayer Defect Effects on the Phonon Properties of Bilayer Graphene and its Nanoribbon
Phonon properties of AB (Bernal) stacked bilayer graphene (BLG) with various types of defects have been investigated theoretically. Forced Vibrational (FV) method has been employed to compute the phonon modes of disordered BLG. A downward linear shift of E2g mode frequencies has been observed with …
Page 1 of 3