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      Evaluation of antibacterial and catalytic potential of copper-doped chemically exfoliated boron nitride nanosheets

      , , , , , , ,
      Ceramics International
      Elsevier BV

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          Two-dimensional atomic crystals

          We report free-standing atomic crystals that are strictly 2D and can be viewed as individual atomic planes pulled out of bulk crystals or as unrolled single-wall nanotubes. By using micromechanical cleavage, we have prepared and studied a variety of 2D crystals including single layers of boron nitride, graphite, several dichalcogenides, and complex oxides. These atomically thin sheets (essentially gigantic 2D molecules unprotected from the immediate environment) are stable under ambient conditions, exhibit high crystal quality, and are continuous on a macroscopic scale.
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            The Scherrer equation versus the 'Debye-Scherrer equation'.

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              Is Open Access

              Large-area graphene-based nanofiltration membranes by shear alignment of discotic nematic liquid crystals of graphene oxide

              Graphene-based membranes demonstrating ultrafast water transport, precise molecular sieving of gas and solvated molecules shows great promise as novel separation platforms; however, scale-up of these membranes to large-areas remains an unresolved problem. Here we demonstrate that the discotic nematic phase of graphene oxide (GO) can be shear aligned to form highly ordered, continuous, thin films of multi-layered GO on a support membrane by an industrially adaptable method to produce large-area membranes (13 × 14 cm2) in 90%) for charged and uncharged organic probe molecules with a hydrated radius above 5 Å as well as modest (30–40%) retention of monovalent and divalent salts. The highly ordered graphene sheets in the plane of the membrane make organized channels and enhance the permeability (71±5 l m−2 hr−1 bar−1 for 150±15 nm thick membranes).
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                Author and article information

                Journal
                Ceramics International
                Ceramics International
                Elsevier BV
                02728842
                September 2020
                September 2020
                : 46
                : 13
                : 21073-21083
                Article
                10.1016/j.ceramint.2020.05.180
                e78d0be9-5516-407c-a8e1-39f14b9bbe98
                © 2020

                https://www.elsevier.com/tdm/userlicense/1.0/

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