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Home NEWS Science News Chemistry

Coating plastics by porous nanofilm

Bioengineer by Bioengineer
November 9, 2020
in Chemistry
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Credit: Tohoku University

A research team has developed a new method for creating metal-organic framework (MOF) thin films that can be applied to sensors and electric devices.

Like sponges, porous materials contain pores. The pore size affects the property of the material. For example, small pores create more absorbent surface areas. Silica gel, which is often used in food packaging to soak up moisture, is one typical example.

Recent studies on porous materials have led to the development of new materials with designable pores, affording scientists with greater control over the properties of such materials.

MOF is a porous material made up of metal ions coordinated by organic linking molecules. Well-ordered nanopores in MOFs have potential applications in material science and pharmacology.

Despite a growing interest in MOFs, researchers have yet to establish an effective method for forming MOF into thin films. Most studies on MOF preparation focus exclusively on the powdered form. Forming MOF into thin films opens up its use for humidity sensing, gas sensing and resistive switching devices.

Researchers from Tohoku University, Iwate University and the Japan Synchrotron Radiation Research Institute (JASRI) overcame this obstacle by controlling the growth of MOF into films. This involved a simple “layer-by-layer” method, which uses sequential immersing of substrates into ingredient solutions.

The research group chose four types of commonly used plastic materials as a substrate for MOF film growth. They cultivated the growth of MOF films on plastic materials such as nylon and acrylic resin.

“The facile and versatile fabrication techniques used in this study have opened up MOFs to new application fields such as sensors and memory devices,” said Shunsuke Yamamoto, co-author of the study. “We hope our research serves as the starting point for using MOF films with electronic devices.”

Further studies on the film growing mechanism are expected to provide important insights into the coating on flexible and transparent plastic substrates under ambient conditions.

###

Media Contact
Shunsuke Yamamoto
[email protected]

Original Source

https://www.tohoku.ac.jp/en/press/coating_plastic_by_porous_nanofilm.html

Related Journal Article

http://dx.doi.org/10.1021/acsami.0c13016

Tags: Chemistry/Physics/Materials SciencesMaterials
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