Journal Article10.1021/LA971336Y
Oriented Bacteriorhodopsin/Polycation Multilayers by Electrostatic Layer-by-Layer Assembly
154
TL;DR: In this article, the spontaneous alternating adsorption of polycationic poly(dimethyldiallylammonium chloride) (PDAC) and PM fragments was used to construct multilayers of the purple membrane.
read more
Abstract: The purple membrane (PM) containing bacteriorhodopsin (BR) is a promising biomaterial for many potential optical and optoelectronic device applications. Organized, heterogeneous assemblies using polycationic poly(dimethyldiallylammonium chloride) (PDAC) and PM fragments have been successfully constructed by the spontaneous alternating adsorption of PDAC and PM. The fabrication process of the multilayers was followed by UV-vis absorption spectroscopy and ellipsometry. The results indicate that the deposition process is linear and highly reproducible from layer to layer and that a monomolecular film of PM may be obtained in each PDAC/PM bilayer by controlling the adsorption time. Second harmonic generation measurements from the composite films gave a second-order susceptibility x 121 of 8.1 x 10 -9 esu and confirm that the PM fragments are arrayed with a high degree of orientation and acentric polar order in the films. Atomic force microscopy images provided the surface morphology of sequential layers of PDAC and PM fragments. Relative PDAC/PM bilayer thicknesses of 55 A were observed, and the homogeneity of the layers was found to improve as the number of layers increased.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Chitosan-based biomaterials for tissue engineering
TL;DR: The preparation and properties of innovative chitosan-based biomaterials, with respect to their future applications, are highlighted, with a special focus on wound healing application.
2K
Biomedical Applications of Layer‐by‐Layer Assembly: From Biomimetics to Tissue Engineering
TL;DR: In this article, a systematic review of current research on biomedical applications of layer-by-layer assembly is presented, where the structure and bioactivity of biomolecules in thin films fabricated by layer by layer assembly are introduced.
Biomedical applications of electrostatic layer-by-layer nano-assembly of polymers, enzymes, and nanoparticles
Hua Ai,Steven A. Jones,Yuri Lvov +2 more
TL;DR: Electrostatic layer-by-layer (LbL) self-assembly has shown broad biomedical applications in thin film coating, micropatterning, nanobioreactors, artificial cells, and drug delivery systems.
440
Polyoxometalates: formation, structures, principal properties, main deposition methods and application in sensing
TL;DR: In this article, the potential applications of POMs on solid substrates as sensors for the detection and determination of analytes both in liquid and in the gas phase are addressed and compared.
286
Layer-by-layer self-assembly in the development of electrochemical energy conversion and storage devices from fuel cells to supercapacitors.
TL;DR: In this review, the application of LbL self-assembly in the development and synthesis of key materials of PEMFCs including polyelectrolyte multilayered proton-exchange membranes, methanol-blocking Nafion membranes, highly uniform and efficient Pt-based electrocatalysts, self-assembled polyelectronically functionalized carbon nanotubes (CNTs) and graphenes will be reviewed.
273
References
Fuzzy Nanoassemblies: Toward Layered Polymeric Multicomposites
TL;DR: In this article, a general approach for multilayers by consecutive adsorption of polyanions and polycations has been proposed and has been extended to other materials such as proteins or colloids.
10.1K
Rhodopsin-like Protein from the Purple Membrane of Halobacterium halobium
TL;DR: It is shown that the purple colour is due to retinal bound to an opsin-like protein, the only protein present in this membrane fragment, which has been isolated in relatively pure form from Halobacterium halobium.
2.1K
Assembly of multicomponent protein films by means of electrostatic layer-by-layer adsorption
TL;DR: In this article, a multilayer films which contain ordered layers of more than one protein species were assembled by means of electrostatic adsorption mostly with positively charged poly(ethy1enimine) (PEI) or with negatively charged poly (styrenesu1fonate) (PSS).
1.4K
Competing Interactions and Levels of Ordering in Self-Organizing Polymeric Materials
TL;DR: The use of self-organizing materials, such as liquid crystals, block copolymers, hydrogen-and π-bonded complexes, and many natural polymers, may hold the key to developing new structures and devices in many advanced technology industries as mentioned in this paper.
736