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 20 of 27 for “"Nanopatterns"”.
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Molecular Crystallization Directed By Nanoparticles And Nanopatterns
<p>This dissertation focuses on nanoparticle/nanopattern-induced molecular self-assembly and crystallization. We propose a universal strategy to synthesize organic/inorganic hybrid nanostructures using inorganic nanoparticles and nanoparticle arrays to induce organic crystalline compound nucleation …
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Insertion of metal oxides into block copolymer nanopatterns as robust etch masks for nanolithography
Directed self-assembly (DSA) of block copolymers (BCPs) is a prime candidate to further extend dimensional scaling of silicon integrated circuit features for the nanoelectronic industry. Top-down optical techniques employed for photoresist patterning are predicted to reach an endpoint due to …
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Designing surface chemistries for in situ AFM investigations of biomolecular reactions with proteins at the nanoscale
… was used to fabricate regular arrays of nanopatterns of ù-functionalized n-alkanethiols with designated terminal chemistries. After writing nanopatterns, protein binding occurs selectively on carboxylate-terminated nanopatterns via covalent bonds that are formed using …
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Biological Adhesion on Nanopatterned Substrates Studied with Force Spectroscopy and Microinterferometry
… are required. In this work, biofunctional nanopatterns were employed, which allow molecules to be positioned in a quasi-hexagonal lattice. For such an arrangement of streptavidin molecules the surface energy was analysed microinterferometrically. Furthermore, nanopatterns were used to …
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Nano-electro-mechanical systems fabricated by tip-based nanofabrication
… we experimentally found out that polystyrene nanopatterns deposited by a heated AFM tip can serve directly as etch mask and transfer the nanopatterns to solid-state materials such as silicon and silicon oxide through one step of etching, solving the first challenge for NEMS device fabrication …
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Fabrication of nanostructured surfaces with well-defined chemistry using particle lithography
… of mixing, centrifuging, evaporation and drying. Nanopatterns of bovine serum albumin and staphylococcal protein A were produced with particle lithography. The immobilized proteins remain attached to the surface and form nanopatterns over micron areas corresponding to the thickness of a single …
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Investigations of Structure / Property Interrelationships of Organic Thin Films Using Scanning Probe Microscopy and Nanolithography
… on Au(111), which can be used for inscribing nanopatterns of n-alkanethiols. Arrays of DPP nanopatterns with precise geometries and alignment were fabricated within n-alkanethiols by nanografting, demonstrating nanoscale lithography with pyridyl porphyrins can be accomplished to produce an …
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Scanning Probe Investigations of Magnetic Nanoparticles, Protein Binding and the Synthesis of Rare Earth Oxide Nanoparticles Using Nanoscale Lithography
… masks. The surface platforms of well-defined nanopatterns are ideal for high resolution investigations using scanning probe microscopy (SPM). Local measurements of surface properties combined with visualization of the steps of chemical reactions at the molecular level were accomplished. …
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Novel analytical method for investigating compositional driven ion-induced nanopatterning of multicomponent materials
… of GaSb produces hexagonally ordered nanopatterns with cone-shaped nanofeatures, where experimental investigations have shown that these nanopatterns form under a wide variety of ion parameters – including ion energy and ion species. Several theoretical works have developed models to …
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Molecular-Level Investigations Combining Nanoscale Lithography and Atomic Force Microscopy
… mask to define the periodicity and size of nanopatterns using processes of self-assembly. A close-packed arrangement of mesospheres is produced spontaneously when monodisperse solutions of latex or silica are dried on a flat surface. Organosilanes attach to surfaces by successive steps of …
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Nanoscale Manipulation of Surfaces and Interfaces: Engineering Electrical Properties Through Nanofabrication
… conductive AFM tip as a tiny electrode to write nanopatterns into surfaces by very localized electrochemical oxidation. These nanopatterns are then exposed to an electroless copper plating solution, which selectively plates copper right onto those nanopatterns, to form copper nanofeatures. These …
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Dual-Colour STED-microscopy on the Nanoscale
… The method proved to resolve hitherto uncovered nanopatterns of vesicle proteins on endosomes, as well as localized different proteins in mammalian mitochondria.
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Ion Irradiation Induced Roughening and Smoothing of Metal Films on Dielectric Substrates
… ion bombardment. The films roughen and form nanopatterns which coarsen in a certain dose range. The microstructure evolution is characterized using AFM, SEM and RBS. The results are explained using a novel irradiation induced dewetting mechanism involving local melting and viscous flow. The …
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Design of 3D Complex Nanostructures Using Block Copolymer Self-Assembly
… approach for the fabrication of various nanopatterns. By implementing external guidance and modifying molecular architectures, long-range ordered BCP microdomains can be oriented and registered in specific locations during the annealing process. Over the past few decades, BCP …
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Nanotemplate creation and self-assembly on the (111) surface of gold
… for growing highly ordered, multi-functional nanopatterns. I performed a series of studies in UHV to investigate the processes of ordered growth and self-assembly on Au(111). I did a combined AES/STM study of the formation of ordered networks of Co islands on Au(111) and obtained the …
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Surface wetting methods compatible with solid SERS substrates
… techniques that can promote complete wetting on nanopatterns without sacrificing SERS efficiency are introduced and discussed in detail. They are: (1) addition of ethanol; (2) addition of surfactants; (3) mild oxygen plasma cleaning; and (4) hydrophilic monolayers. The first two methods modify …
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Studies of ion beam nanopatterning on silicon and polymer thin film
… lead to a spontaneous formation of a range of nanopatterns on surfaces, including nanodots, nanoscale ripples, and nanoscale pits or holes. Research in this thesis is mainly focused on the behavior of ripple patterns on silicon surfaces as a function of the ion incidence angle. A preliminary …
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Surface studies of organic thin films using scanning probe microscopy and nanofabrication
… to prepare regular arrangements of well-defined nanopatterns of porphyrin nanocrystals on conductive substrates. Nanopatterned SAMs of alkanethiols and organosilanes were used successfully to direct the nanocrystals of porphyrins on the surface and characterized with contact and tapping mode …
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High-throughput plasma nanomanufacturing and its applications
… and high-throughput printing of 3D metallic nanopatterns, which significantly improved the feasibility of tip-based nanomanufacturing as a next-generation nanolithography technology.
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Progress in coherent lithography using table-top extreme ultraviolet lasers
… which is capable of printing 50nm half pitch nanopatterns will be illustrated in chapter III. A detailed discussion of its resolution limit will be presented followed by the development of X-Y-Z positioning stage, the fabrication protocol for diffractive EUV mask, and the pattern transfer …
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