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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 42 for “"Directed self assembly"”.
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Multi-frequency Ultrasound Directed Self-assembly
Ultrasound directed self-assembly (DSA) relies on the acoustic radiation force associated with a standing ultrasound wave to organize particles dispersed in a fluid medium into specific patterns. State-of-the-art ultrasound DSA methods can only organize particles into (quasi-)periodic patterns, …
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Directed Self-Assembly of Polymer-Decorated Nanoparticles
… method to organize the nanoparticles using self-assembly. The consistent and reproducible organization of the nanoparticles has tremendous value in all industries using nanoparticles in lowering production and processing costs and time.The surface reactivity of the nanoparticles is found to …
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INTERFACE DIRECTED SELF-ASSEMBLY OF LIQUID CRYSTAL-NANOPARTICLE HYBRID MATERIALS
The self-assembly of nanoparticles (NPs) has broad applications. This process is controlled by the NP cores and the molecular interactions at the interfaces between ligands and their environments, which impart dynamics to the assembled superlattices (SLs) with temperature changes. Designing and …
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Simulation and control of dynamic directed self-assembly of nanostructures
Self-assembled nanoscale structures are the basis for various technological advancements in functional materials, sensors, and molecular circuits and factories. With significant progress in self-assembly of periodic nanostructures (such as monolayers), the focus is now shifting towards non-periodic …
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Three-dimensional nanofabrication by electron-beam lithography and directed self-assembly
… lithography (EBL), block copolymer (BCP) self-assembly, and capillary force-induced self-assembly. We first developed new processes for fabricating 3D nanostructures using a hydrogen silsesquioxane (HSQ) and poly(methylmeth-acrylate) (PMMA) bilayer resist stack. We demonstrated …
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Designing and Fabricating 3D Nanostructures through Directed Self-Assembly of Block Copolymers
… methods such as ‘top-down’ lithography, self-assembly of block copolymer (BCP) provides a promising avenue to fabricate 3D nanostructures in a ‘bottom-up’ way. By applying an external field, the BCP self-assembly process is biased, and single-crystalline nanostructures with …
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Chirality directed self-assembly: in situ construction of recyclable and reusable Janus dendrimers
… we successfully demonstrate a novel metal-ligand self-assembly approach with a high level of chiral discrimination to construct Janus dendrimers in situ. As far as we are aware, this is the first such example utilizing metal-ligand interaction for the construction of Janus dendrimers. Using this …
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Magnetic field directed self-assembly of gold Pickering emulsion for preparing patterned film.
… by applying a magnetic and spin coating directed self-assembly (MSCDS) to prepare optically sensitive dipole-dipole chain-like ordered arrays of the gold nanoparticle Pickering ferrofluid in polyvinyl alcohol (PVA) emulsion, in the form of a thin film on glass and silicon substrate. …
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Coarse grained molecular dynamic of block copolymer directed self assembly on topographic substrate
Directed self-assembly (DSA) of block copolymer (BCP) is a promising and economic method of manufacturing periodic lamellar patterns on wafer that is widely used in semi-conductor and electronic fields. In BCP DSA lithography, same as issues in achieving defective free patterns and smooth edges, an …
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Investigation into obstacles to the implementation of the directed-self assembly of block copolymers
… have been suggested. Among these options is the directed self-assembly (DSA) of block copolymers (BCPs) which have the ability to microphase separate into features with spacings as low as sub-10 nm. The DSA of these features are typically achieved by graphoepitaxy or chemoepitaxy which use either …
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Modeling and theoretical design methods for directed self-assembly of thin film block copolymer systems
… applications due to their ability to self-assemble into complex periodic patterns with feature resolutions ranging from a few to 100s nm. BCPs form a wide variety of patterns due the combination of their enthalpic interactions promoting immiscibility between the blocks and the bonding …
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Mesoscale simulation of block copolymer phase separation and directed self-assembly processes: Applications for semiconductor manufacturing
… (BCP) model was developed and used to studied directed self-assembly (DSA), especially in regards to applications for semiconductor manufacturing. Most of the thesis is spent investigating the effect that guiding layer properties and block copolymer properties have on line roughness and defect …
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Directed self-assembly of block copolymers with functional materials : a study of nanocomposite thin film fabrication on graphoepitaxial templates
… consequently a variety of highly controllable self-assembly patterns. Directed self-assembly (DSA) of BCPs has therefore emerged as one of the most promising technologies to fabricate functional nanostructures and is able to produce patterns with ultra-small resolution (sub-10 nm) while …
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Experimental and numerical investigation of steady-state and transient ultrasound directed self-assembly of spherical particles in a viscous medium
Ultrasound directed self-assembly (DSA) utilizes the acoustic radiation force associated with a standing ultrasound wave field to organize particles dispersed in a fluid medium into specific patterns. The ability to tailor the organization and packing density of spherical particles using ultrasound …
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Creating selective directional interactions with defects caused by subnanometre-ordered ligand domains on the surface of colloidal metal nanoparticles for the purpose of directed self-assembly
Introduction: The ability to utilize directional, specific bonds are a fundamental property of atoms which has allowed us to predictably create molecules of consistent geometry and composition for centuries. One fundamental difference between a true atom and a nanoparticle is that to date, …
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Computation by block copolymer self-assembly
… In this thesis, we use block copolymer self-assembly, a well-studied phenomenon in polymer science, to develop a new approach to computing by applying directed self-assembly to implement Ising-model-based computing systems in materials. In the first part of the thesis, we investigate …
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Templated self-assembly of novel block copolymers
Self-assembly of block copolymers (BCPs) is emerging as a promising route for numerous technological applications to fabricate a variety of nanoscopic structures. The resulting feature sizes range from a few to several hundred nanometers, and are readily tunable by varying the molecular weights of …
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Synthesis and Self-Assembly of Novel ABC Miktoarm Star Terpolymers
… for ABC miktoarm star terpolymers and their self-assembly into complex superstructures in aqueous solution are described within this thesis. To this aim a modular route for such materials was developed, combining anionic polymerization and copper-catalyzed azide-alkyne cycloaddition. At the …
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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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Block copolymer self-assembly - a computational approach towards novel morphologies
Spontaneous self-assembly of materials is a phenomenon exhibited by different molecular systems. Among many, Block copolymers (BCPs) proved to be particularly interesting due to their ability to microphase separate into periodic domains. Nonetheless, the rising need for arbitrary, complex, 3D …
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