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Title: | A biosupramolecular approach to graphene: Complementary nucleotide-nucleobase combinations as enhanced stabilizers towards aqueous-phase exfoliation and functional graphene-nucleotide hydrogels |
Authors: | Caridad Cañizo, Bárbara; Paredes Nachón, Juan Ignacio CSIC ORCID ; Pérez Vidal, Óscar; Villar Rodil, Silvia CSIC ORCID ; Pagán, A.; Cenis, J. L.; Martínez Alonso, Amelia CSIC ORCID ; Díez Tascón, Juan Manuel CSIC ORCID | Issue Date: | 5-Dec-2017 | Publisher: | Elsevier | Citation: | Carbon 129: 321-334 (2018) | Abstract: | The ability to use RNA/DNA nucleotides as colloidal stabilizers for graphene would be an important asset, as a close graphene-nucleotide association would facilitate access to hybrid systems where the rich covalent and supramolecular chemistry of these biomolecules could be exploited alongside graphene in a number of applications. Unfortunately, single RNA/DNA nucleotides are inefficient graphene dispersants. Here we propose and demonstrate a supramolecular strategy which overcomes this limitation, affording aqueous dispersions of high quality graphene flakes with much improved colloidal stability. A nucleotide is combined with its complementary nucleobase yielding stable hydrogen-bonded supramolecular entities that adsorb more strongly on the graphene surface than their individual components. Based on this approach, graphene-nucleotide hybrid hydrogels could be readily obtained, where the graphene flakes were intimately and uniformly intermixed with the nucleotide-based gel phase. Such hydrogels exhibited higher uptakes and/or slower release profiles of dyes and drugs (rhodamine B, methylene blue and tetracycline) than their graphene-free counterparts. Cell proliferation tests suggested the graphene materials obtained with nucleotide-nucleobase stabilizers to be biocompatible. The present results constitute a novel strategy in the processing and molecular integration of graphene that could be extended to other (bio)molecules of interest towards the realization of functional materials for different applications. | Publisher version (URL): | https://doi.org/10.1016/j.carbon.2017.12.007 | URI: | http://hdl.handle.net/10261/177349 | DOI: | 10.1016/j.carbon.2017.12.007 | ISSN: | 0008-6223 |
Appears in Collections: | (INCAR) Artículos |
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Biosupramolecular_approach_Caridad.pdf | 933,78 kB | Adobe PDF | ![]() View/Open | |
Biosupramolecular_approach_Caridad_SI.pdf | Supplementary data | 152,57 kB | Adobe PDF | ![]() View/Open |
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