Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add more filters










Database
Language
Publication year range
1.
Macromol Biosci ; 11(4): 514-25, 2011 Apr 08.
Article in English | MEDLINE | ID: mdl-21218405

ABSTRACT

An easy route to planar solid-supported polymer membranes by vesicle spreading is described. Pre-organized poly(butadiene)-block-poly(ethylene oxide)(PB-PEO) assemblies were spread on two different supports, i.e. strongly hydrophilic glass surfaces and ultrasmooth gold substrates. Polymer membranes were produced on a hydrophilic support by spreading hydroxyl-functionalized polymer vesicles, while covalently immobilized polymer membranes were obtained by spreading LA-functionalized polymer vesicles on gold substrates. Covalently bound membranes were further incubated with the peptide polymyxin B. Interactions with the polymer membrane were detected by EIS. These systems are of great interest to fundamental membrane science and have potential in technological applications, such as drug screening and (bio)sensing.


Subject(s)
Butadienes/chemistry , Gold/chemistry , Membranes, Artificial , Polyethylene/chemistry , Polymyxin B/chemistry , Biosensing Techniques/methods , Drug Evaluation, Preclinical/methods , Surface Properties
2.
Nano Lett ; 11(2): 446-54, 2011 Feb 09.
Article in English | MEDLINE | ID: mdl-21218827

ABSTRACT

We apply colloidal lithography to construct stacked nanocrescent dimer structures with an exact vertical alignment and a separation distance of approximately 10 nm. Highly ordered, large arrays of these nanostructures are accessible using nonclose-packed colloidal monolayers as masks. Spatially separated nanocrescent dimers are obtained by application of spatially distributed colloids. The polarization dependent optical properties of the nanostructures are investigated in detail and compared to single crescents. The close proximity of the nanocrescents leads to a coupling process that gives rise to new optical resonances which can be described as linear superpositions of the individual crescents' plasmonic modes. We apply a plasmon hybridization model to explain the spectral differences of all polarization dependent resonances and use geometric arguments to explain the respective shifts of the resonances. Theoretical calculations are performed to support the hybridization model and extend it to higher order resonances not resolved experimentally.


Subject(s)
Colloids/chemistry , Models, Chemical , Nanostructures/chemistry , Nanotechnology/instrumentation , Surface Plasmon Resonance/instrumentation , Computer Simulation , Crystallization/methods , Equipment Design , Equipment Failure Analysis , Light , Nanostructures/ultrastructure , Particle Size , Scattering, Radiation
SELECTION OF CITATIONS
SEARCH DETAIL
...