Properties of graphene change in humid conditions

phys.org | 1/21/2019 | Staff
ali11 (Posted by) Level 3
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Graphene exhibits very different properties in humid conditions, according to researchers from Queen Mary University of London.

Graphene, which is made from carbon and was discovered in 2004, is hailed for many of its extraordinary characteristics including being stronger than steel, more conductive than copper, light, flexible and transparent.

Study - Physical - Review - B - Graphene

This study, published in the journal Physical Review B, shows that in bi-layer graphene, which is two sheets of one atom thick carbon stacked together, water seeps between the layers in a humid environment.

The properties of graphene significantly depend on how these carbon layers interact with each other and when water enters in between it can modify the interaction.

Researchers - Water - Layer - Cent - Humidity

The researchers found the water forms an atomically thin layer at 22 per cent relative humidity and separates graphene layers at over 50 per cent relative humidity.

This suggests that layered graphene could exhibit very different properties in a humid place such as Manchester, UK, where average relative humidity is over 80 per cent every month of the year, compared to a dry place such as Tucson, Arizona, where relative humidity is 13 per cent on afternoons in May but rises to 65 per cent on January mornings. So, in Tucson the properties will vary according to the time of the year.

Graphene - Layer - Number - Uses - Results

Graphene, both layered and single layer, potentially has a huge number of uses but the results of this study could impact how the material...
(Excerpt) Read more at: phys.org
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