Topology, of nanostructures

Automated Extraction of Interference Functions. For the classical synthetic polymer materials it is, in general, possible to strip the interference function from the scattering data by an algorithm that does not require user intervention. Quantitative information on the non-topological parameters is lost (Stribeck [26,153]). The method is particularly useful if extensive data sets from time-resolved experiments of nanostructure evolution must be processed. Background ideas and references are presented in the sequel. 

The analytical structural model for the topology of the nanostructure is defined in Isr (5). For many imaginable topologies such models can be derived by application of scattering theory. Several publications consider layer topologies [9,84,231] and structural entities built from cylindrical particles [240,241], In the following sections let us demonstrate the principle procedure by means of a typical study [84],... 

The electrostatic attraction between oppositely charged molecules is an adjustable driving force for structured material construction. The current synthetic routes of polymer production often offer many variations in size, topology, functionality and polydispersity. An electrostatically driven assembly of nanostructures allows for the controlled incorporation of materials available by synthetic routes. Biological macromolecules, nevertheless, offer superior polyfunctionality compared to synthetic macromolecules. We preferentially use them. 

Nanoparticles fabricated in such a way possess a good adhesion to the surface. Previously it was shown that surface relief strongly affects the topology of gold deposition. A pretextured semiconductor surfaces can be used as templates for ID, 2D ordered nanostructure fabrication [4]. The polished (100) surfaces of n-GaAs single crystal were used for the metal deposition. Typical gold nanoparticle ensembles are shown in Fig. la. Silver nanoparticles (Fig. lb) are of 30 - 60 nm in diameter and uniformly cover the surface. 

Surface nanostructuring by grafting functional polymers to a substrate surface is a surface modification approach that provides the enhancement of the chemical functionality and alters the surface topology of native inorganic and organic materials [182]. 

---