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- W2206610678 abstract "The main scope of this thesis is the creation of functional surfaces with hard-core/soft-shell plasmonic colloidal building blocks in respect of optical surface functionalization. With the focus on bottom up surface modification using self-assembly and template assisted self-assembly techniques. The optical functionalities are introduced by plasmonic nanoparticles and tailored either via the deposition or via chemical post-modification.The colloid types, which are used in this framework, are hard-core/soft-shell colloids. An advantage of such hybrid particles is the plurality in functionalities. The optical properties are introduced by the usage of either silver or gold nanoparticles as core material encapsulated in a micro gel. Silver and gold show a so-called localized surface plasmon (LSPR). This resonance is also present if such particles are deposited on surfaces. This makes them interesting for sensing applications, for instance surface enhanced Raman spectroscopy (SERS) and refractive index sensing or other applications like wave guiding, light harvesting in photovoltaic or monitoring catalysis. The soft polymeric poly(N-isopropylacrylamide) shell contributes a multitude of other advantages. The shell prevents the plasmonic cores from aggregation and is stimuli responsive to changes in temperature, pH, or ionic strength. Additionally it acts as a spacer for the plasmonic cores to keep their individual optical properties. The deformable shell allows surface modifications inaccessible for hard sphere systems. The permeability of the gel network supports a chemical post-modification of the pre-assembled cores. This thesis will demonstrate how glass surfaces can be altered with these colloidal building blocks for a variety of purposes.%%%%Der Fokus dieser Dissertation liegt in der Funktionalisierung von Oberflachen mit Hilfe von kolloidalen Kern-Schale Bausteinen mit Schwerpunkt auf masgeschneiderten optischen Eigenschaften.Um die Oberflachen zu modifizieren werden Selbst- und templatgestutze Assemblierungsmethoden verwendet. Die optischen Eigenschaften werden durch die Verwendung von plasmonischen Nanopartikeln erzielt. Uber die Art der Anordnung und durch chemische Postmodifizierung konnen diese Eigenschaften eingestellt werden.Die verwendeten Kolloide bestehen aus einem harten Kern und einer weichen, den Kern umgebenden Schale. Der Vorteil solcher Hybridpartikel liegt in der Vielfaltigkeit ihrer Einsatzmoglichkeiten begrundet. So kann die optische Funktionalitat uber die Art des Kernmaterials, entweder Silber oder Gold, eingestellt werden, da beide Metalle eine so genannte lokalisierte Oberflachen Plasmon (LSPR) zeigen. Diese Resonanz kann erhalten bleiben, wenn solche Nanopartikel auf Oberflachen abgeschieden werden. Dies macht sie interessant fur Anwendung in der Sensorik, beispielsweise fur oberflachenverstarkte Raman Spektroskopie (SERS) und Brechungsindexmessungen oder fur den Einsatz in Photovoltaik, Katalyse oder als Wellenleiter. Das weiche Polymernetzwerk…" @default.
- W2206610678 created "2016-06-24" @default.
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- W2206610678 date "2015-01-01" @default.
- W2206610678 modified "2023-09-23" @default.
- W2206610678 title "Plasmonic Surface Modifications with Hard-Core/Soft-Shell Nanoparticles" @default.
- W2206610678 hasPublicationYear "2015" @default.
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