Langmuir-Blodgett film characterization in air using MP-SPR

Application Note #109

Langmuir-blodgett


Figure 2
. Complete measured (dots) and fitted (lines) SPR curves from left to right clean gold surface, 1, 3, and 5 SACd LB layers.

Multi-Parametric Surface Plasmon Resonance (MP-SPR) was utilized to characterize Langmuir-Blodgett (LB) deposited mono- and multilayers of stearic acid. Thickness of one LB layer was determined to be 2.45 nm.

The ability to assemble ordered molecular films with tailored functionality over macroscopic lateral dimensions provides exciting and unique opportunities in many practical and commercial applications. Sensors, detectors, displays and electronic circuit components are just a few examples.

This well-known technique is referred to as Langmuir-Blodgett (LB) deposition, where films of functional molecules, nanoparticles, nanowires or microparticles are spread at the air-water interface, compressed and transferred to a solid substrate.

Recommended instrument for this application:

200_otso_small.jpg 400_KONTIO_LOGO_24012019_cropped.jpg 210_vasa_small.jpg 410A_KAURIS_instrument.jpg  220A_naali_small.jpg 420_ilves_small.jpg
200 OTSO 400 KONTIO 210A VASA  410A KAURIS  220A NAALI 420A ILVES 
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Further reading

  • If you are interested in the measurement principle of in situ and ex situ deposited layers to enable not only interaction and thickness calculations but also layer refractive index, we recommend AN#128 for further reading.

  • Do you want to find out how to calculate thickness out of MP-SPR measurements? Click here.

  • Do you want to see how MP-SPR instruments range? Click here.

  • Click here to take a look at MP-SPR publications. 

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