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.
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Showing 1 to 12 of 12 for “"Dry contact transfer"”.
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Electronic characterization of solution-synthesized graphene nanoribbons using scanning tunneling microscopy
… 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 chevron GNR and new chevron/7A heterojunction GNR with functionalized side chains are also …
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Scanning tunneling microscopy and spectroscopy of wet chemically synthesized porous graphene nanoribbons on hydrogen passivated silicon (100)
… 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 microscopy (STM) and scanning tunneling spectroscopy (STS). A unique electronic feature is observed at the …
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Scanning tunneling microscopy investigations of transition metal dichalcogenide 1t-tantalum disulfide and zigzag-shape graphene nanoribbons in ultra-high vacuum
… through scanning tunneling microscopy (STM). Dry contact transfer allows unperturbed transfer and exfoliation of desired two-dimensional (2D) layered materials onto a desired substrate under ultra-high vacuum (UHV), to largely prevent potential solvent and atmospheric contamination. STM …
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Integration of Single -Walled Carbon Nanotubes With Gallium Arsenide(110) and Indium Arsenide(110) Surfaces: A Scanning Tunneling Microscopy Study
… onto the substrates via an UHV-compatible dry contact transfer procedure. STM images indicate that SWNTs on these III-V(110) surfaces possess a striking orientation-dependent adhesion preference, with nanotubes exhibiting an enhanced stability when aligned along the substrate lattice rows. …
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Scanning tunneling microscopy investigation of atomically precise graphene nanoribbons
This dissertation demonstrates 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 …
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Scanning Tunneling Microscopy and Spectroscopy of Carbon Nanotubes Interfaced With Silicon Surfaces
… Si(100) surface. An approach termed dry contact transfer (DCT) was developed for the UHV deposition of SWNTs with minimal disruption of the atomically flat Si(100)-2x1:H surface. Isolated, rather than bundled, SWNTs could be routinely located on the surface for atomically resolved …
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Synthesis of 1T-Tantalum (IV) Sulfide and observation of charge density wave using scanning tunneling microscopy
… flat, H-passivated silicon substrate using dry contact transfer (DCT), an in-situ deposition technique developed by the Lyding group for clean, UHV-compatible transfer of nano-materials. We managed to directly observe room-temperature CDW on the deposited nano-flakes of 1T-TaS2. The …
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Scanning tunneling microscopy characterization and metallic nanocontacts for atomically precise graphene nanoribbons
… and scanning tunneling spectroscopy (STS). A dry contact transfer (DCT) technique was implemented for depositing GNRs onto various semiconducting substrates. Detailed STM and STS measurements of doublewide GNRs on InAs(110) and InSb(110) confirmed their geometries and revealed a 2 eV bandgap …
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Scanning tunneling microscopy and spectroscopy of graphene on semiconducting surfaces
… graphene features on the surfaces through a dry contact transfer (DCT) technique in the UHV system. The graphene-substrate interaction for the surfaces used in this study varied from quite inert and non-perturbing for the Si(100) – 2×1:H surface to highly disruptive and strongly interacting …
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Large-scale graphene transfer in ultra-high vacuum and design of a low temperature ultra-high vacuum scanning tunneling microscope
This thesis documents a way of transferring large-scale graphene onto clean surfaces in an ultra-high vacuum scanning tunneling microscope chamber via a modified direct contact transfer method. A polyethylene terephthalate (PET) film was chosen as the material for supporting graphene during the …
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Surface glassy dynamics and single-molecule absorption of quantum dots detected by scanning tunneling microscopy
… spectroscopy and intermolecular energy transfer between single quantum dots (QDs) and carbon nanotubes (CNTs). Glass is an exotic state of matter which is not in equilibrium, but can be stable for billions of years. However, the microscopic understanding of glasses, the glass transition …
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Single molecule optical absorption at room temperature detected by scanning tunneling microscopy
… quantum dots and carbon nanotubes deposited by dry contact transfer onto a Pt-Au film, resulted in a strong, phase dependent absorption signal. Results from a collaboration with a theoretical group at the University of Washington aid in the explanation of the observed shapes of excited electron …