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Dr Radha Boya

Dr Radha Boya

‘Selective Sieving by Atomically Thin van der Waals Capillaries’

Dr Radha Boya, University of Manchester

The proposal is to produce atomically narrow channels through layers of two-dimensional materials such as graphene and MoS2. The founding work was published in Nature in 2016. The method works well and the sieves can be used for periods of months using water. However, it was found in their published work that the sieves become blocked after several days using air. How much does the proposed method for filtration depend on the use of water as the main component? Water in nano-confined spaces is known to become structured with variable reports of the size of the hydration layer. Thus, the viscosity increases in these regions. What is the relationship between liquid meniscus area and the channels? It is possible that use of solutions containing other substances than water would change the properties of the interaction with the channel and lead to more rapid clogging.

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