Which technology is used in Langmuir-Blodgett film?
Which technology is used in Langmuir-Blodgett film?
Anti-reflective glass can be produced with successive layers of fluorinated organic film. The glucose biosensor can be made of poly(3-hexyl thiopene) as Langmuir–Blodgett film, which entraps glucose-oxide and transfers it to a coated indium-tin-oxide glass plate.
What is Langmuir-Blodgett method?
Abstract. The Langmuir-Blodgett (LB) technique is a way of making supra-molecular assembly in ultrathin films with a controlled layered structure and crystal parameter, which have many envisioned technological applications for optical and molecular electronic devices as well as signal processing and transformation.
How does a Langmuir trough work?
The LB trough allows investigators to prepare a monolayer of amphiphilic molecules on the surface of a liquid, and then compress or expand these molecules on the surface, thereby modifying the molecular density, or area per molecule.
What is the most common method to create a monolayer of amphiphile on a substrate?
The most common way to transport an amphiphile to the surface is to dissolve it in a volatile non-polar (water-insoluble) solvent and then using a microsyringe to deposit onto the surface. The solution spreads rapidly to cover the available area. As the solvent evaporates, a monolayer is formed.
What are Langmuir monolayers?
A Langmuir monolayer or insoluble monolayer is a one-molecule thick layer of an insoluble organic material spread onto an aqueous subphase in a Langmuir-Blodgett trough. Traditional compounds used to prepare Langmuir monolayers are amphiphilic materials that possess a hydrophilic headgroup and a hydrophobic tail.
What is meant by a surface film?
A layer of the surface of a liquid whose thickness is equal to the range of an intermolecular force is called surface film.
What are Langmuir and Gibbs layers?
A Langmuir monolayer or insoluble monolayer is a one-molecule thick insoluble layer of an organic material spread onto an aqueous subphase. A Gibbs monolayer or soluble monolayer is a monolayer formed by a compound that is soluble in one of the phases separated by the interface on which the monolayer is formed.
What is monomolecular layer?
a layer of a substance or substances that is one molecule thick. From: monomolecular layer in Oxford Dictionary of Biochemistry and Molecular Biology »
What is surface film Shaala?
What is liquid surface film?
Surface film tension is the property of a liquid by which it acts as if its surface is a stretched elastic membrane. Surface film tension is caused by the attraction of water molecules to each other; in addition, the surface molecules are attracted to the underlying molecules. …
What are the technical applications of Sam?
SAMs are an inexpensive and versatile surface coating for applications including control of wetting and adhesion, chemical resistance, bio compatibility, sensitization, and molecular recognition for sensors and nano fabrication.
What is a Langmuir Blodgett film?
Langmuir–Blodgett films are named after Irving Langmuir and Katharine B. Blodgett, who invented this technique while working in Research and Development for General Electric Co. Advances to the discovery of LB and LM films began with Benjamin Franklin in 1773 when he dropped about a teaspoon of oil onto a pond.
What did Langmuir and Blodgett do for the Nobel Prize?
Through this work in surface chemistry and with the help of Blodgett, Langmuir was awarded the Nobel Prize in 1932. In addition, Blodgett used Langmuir–Blodgett film to create 99% transparent anti-reflective glass by coating glass with fluorinated organic compounds, forming a simple anti-reflective coating .
What is the surface pressure of Langmuir film?
The condensed Langmuir films (in surface pressures usually higher than 15 mN/m – typically 30 mN/m) can be subsequently transferred onto a solid substrate to create highly organized thin film coatings. Langmuir–Blodgett troughs
What is liquidlangmuir film?
Langmuir film consisting of complex phospholipids in liquid-condensed state floating on water subphase, imaged with a Brewster Angle Microscope.
