Nanoparticles and thin films made from nanoparticles are gaining recognition and use in various products and applications including displays, sensors and energy storage. These types of products often require well-controlled particle organization, density and film thickness to achieve optimal performance and efficiency.
Langmuir Blodgett Deposition Method
Techniques that enable such control and precision during thin film formation are critically important in the development of new nanoparticle-based materials. The Langmuir-Blodgett deposition method offers a combination of controlled deposition, a wide range of substrates and usability in ambient conditions. In an LB deposition process, a nanoparticle suspension is first deposited at the air/water interface, then, the resulting film is compressed to the desired surface pressure and particle density and then transferred onto a solid substrate by dipping the substrate into and through the particle layer. The deposition can then be repeated to fabricate alternating layer structures or performed at different speeds and temperatures.
Main benefits of the Langmuir-Blodgett technology
Precise control of the monolayer (thin film) thickness and packing density
Homogeneous deposition over large areas
Enables multilayer structures with varying layer composition
Deposition can be made on any kind of solid substrate
Anti-microbial coating is an example of a smart coating that uses silver nanoparticles. Silver nanoparticles are known for their anti-microbial properties and can be incorporated in many types of surface layers and coatings.
Watch a recorded webinar to learn more about:
How to reliably prepare for a Langmuir-Blodgett deposition
How to trap nanoparticles suspended in a subphase-miscible solvent at the air-water interface
How to compress and deposit high quality nanosphere monolayers
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Nanoparticle thin film-based sensors offer several advantages over traditional sensor types, especially in electrochemical sensing. The main challenge has been the fabrication of the nanoparticle sensing layer. Two main methods have been used; layer-by-layer (LbL) and Langmuir-Blodgett (LB).