Emerging Strategies and Applications of Layer-by-Layer Self-Assembly

Abstract

Layer-by-layer self-assembly is an approach to develop an ultrathin film on solid support by alternate exposure to positive and negative species with spontaneous deposition of the oppositely charged ions. This paper summarizes various approaches used for fabrication of layer-by-layer self-assembly as well as their utility to produce various devices. The layer-by-layer technique is basically used for formation of multilayer films. A variety of nanomaterials use it for the modification of films to enhance their resultant durability as well as strength. Studies have shown that many different types of materials can be used for fabrication of multilayers. Recently the layer-by-layer self-assembly technique has also been used for fabrication of gas sensors, hydrogen sensors and solar-based cells. Various methods, such as spin deposition, calcinations, and dry-transfer printing are being used for fabrication of thin films. In this review, the author summarizes the various interesting properties as well as fabrication strategies of layer-by-layer self-assembly.

Micro‐/Nanostructured Interface for Liquid Manipulation and Its Applications

“…Using this method, they developed a simple approach to alternatively adsorption of variety polyanion and polycation onto the substrate . LBL is compatible with a widely range of materials, such as particles, colloids, polymers and even biomolecules . Electrostatic forces are considered as the main driving force for the LBL assembly, but recently hydrogen and covalent bonding can also be involved in this process.…”

Organic-inorganic hybrid layer-by-layer electrostatic self-assembled film of cationic dye Methylene Blue and a clay mineral: Spectroscopic and Atomic Force microscopic investigations

“…The resultant transition dipole moment will lead to the appearance of more broadened and diffused absorption spectral profile for higher order aggregates. The absorption spectroscopic results of MB aqueous solution with respect to their different ionic form for the pH range studied (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13) here is also summarized in Table 1. Fig.…”

“…It has several advantages such as very facile process of film fabrication, low temperature deposition, no limit of the film thickness, wide variety of substrates etc. [5][6][7]. However, this LbL self-assembly process is not only restricted to simple polyelectrolytes rather extended to cover wide diversity of materials such as many biological molecules, inorganic nanoparticles and semiconductors, smectites (clay mineral) etc.…”

Layer‐by‐layer self‐assembly of collagen and chitosan biomolecules on polyurethane films

“…This process is often reversible, depending on conditions such as pH, solvent polarity, type of molecule, concentration, and other factors. [8,9,10] One of the most common processes of LbL self-assembly occurs through electrostatic forces between particles and molecules. In this case, oppositely charged species are bonded together by a strong ion bond, resulting in a stable, robust, and uniform structure.…”