Aqueous dispersions of few-layer-thick chemically modified magnesium diboride nanosheets by ultrasonication assisted exfoliation

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dc.contributor.author Das, Saroj Kumar
dc.contributor.author Bedar, Amita
dc.contributor.author Kannan, Aadithya
dc.contributor.author Jasuja, Kabeer
dc.date.accessioned 2015-06-26T06:15:55Z
dc.date.available 2015-06-26T06:15:55Z
dc.date.issued 2015-06
dc.identifier.citation Das, Saroj Kumar; Bedar, Amita; Kannan, Aadithya and Jasuja, Kabeer, “Aqueous dispersions of few-layer-thick chemically modified magnesium diboride nanosheets by ultrasonication assisted exfoliation”, Scientific Reports, DOI: 10.1038/srep10522, vol. 5, Jun. 2015. en_US
dc.identifier.issn 2045-2322
dc.identifier.uri http://dx.doi.org/10.1038/srep10522
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1774
dc.description.abstract The discovery of graphene has led to a rising interest in seeking quasi two-dimensional allotropes of several elements and inorganic compounds. Boron, carbon’s neighbour in the periodic table, presents a curious case in its ability to be structured as graphene. Although it cannot independently constitute a honeycomb planar structure, it forms a graphenic arrangement in association with electron-donor elements. This is exemplified in magnesium diboride (MgB2): an inorganic layered compound comprising boron honeycomb planes alternated by Mg atoms. Till date, MgB2 has been primarily researched for its superconducting properties; it hasn’t been explored for the possibility of its exfoliation. Here we show that ultrasonication of MgB2 in water results in its exfoliation to yield few-layer-thick Mg-deficient hydroxyl-functionalized nanosheets. The hydroxyl groups enable an electrostatically stabilized aqueous dispersion and create a heterogeneity leading to an excitation wavelength dependent photoluminescence. These chemically modified MgB2 nanosheets exhibit an extremely small absorption coefficient of 2.9 ml mg−1 cm−1 compared to graphene and its analogs. This ability to exfoliate MgB2 to yield nanosheets with a chemically modified lattice and properties distinct from the parent material presents a fundamentally new perspective to the science of MgB2 and forms a first foundational step towards exfoliating metal borides. en_US
dc.description.statementofresponsibility by Saroj Kumar Das et al.
dc.format.extent Vol. 5
dc.language.iso en_US en_US
dc.publisher Nature Publishing Group en_US
dc.subject Boron en_US
dc.subject Carbons neighbour en_US
dc.subject Few-layer-thick en_US
dc.subject Synthesis of graphene en_US
dc.subject Ultrasonication en_US
dc.title Aqueous dispersions of few-layer-thick chemically modified magnesium diboride nanosheets by ultrasonication assisted exfoliation en_US
dc.type Article en_US
dc.relation.journal Scientific Reports


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