127124 20241125101157.0 doi 10.1002/adma.202303570 sideral 134478 ART-2023-134478 eng Wei, Cencen Exotic Electronic Properties of 2D Nanosheets Isolated from Liquid Phase Exfoliated Phyllosilicate Minerals 2023 Access copy available to the general public Unrestricted Spectrally inactive, electrically insulating, and chemically inert are adjectives broadly used to describe phyllosilicate minerals like mica and chlorite. Here, the above is disproved by demonstrating aqueous suspensions of liquid exfoliated nanosheets from five bulk mica types and chlorite schist. Nanosheet quality is confirmed via transmission electron and X‐ray photoelectron spectroscopies, as well as electron diffraction. Through Raman spectroscopy, a previously unreported size‐ and layer‐dependent spectral fingerprint is observed. When analyzing the high‐yield suspensions (≈1 mg mL−1) through UV–vis spectroscopy, all phyllosilicates present bandgap (Eg) narrowing from ≈7 eV in the bulk to ≈4 eV for monolayers. Unusually, the bandgap is inversely proportional to the areal size (A) of the nanosheets, measured via atomic force microscopy. Due to an unrecorded quantum confinement effect, nanosheet electronic properties scale toward semiconducting behavior (bandgap ≈3 eV) as nanosheet area increases. Furthermore, modeling X‐ray diffraction spectra shows that the root cause of the initial bandgap narrowing is lattice relaxation. Finally, with their broad range of isomorphically substituted ions, phyllosilicate nanosheets show remarkable catalytic properties for hydrogen production. info:eu-repo/grantAgreement/ES/DGA/E13-20R info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3 This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 823717-ESTEEM3 info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-104739GB-I00/AEI-10.13039-501100011033 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 27.4 2023 CHEMISTRY, PHYSICAL 4 / 178 = 0.022 2023 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 11 / 439 = 0.025 2023 Q1 T1 NANOSCIENCE & NANOTECHNOLOGY 4 / 141 = 0.028 2023 Q1 T1 PHYSICS, CONDENSED MATTER 3 / 79 = 0.038 2023 Q1 T1 CHEMISTRY, MULTIDISCIPLINARY 5 / 231 = 0.022 2023 Q1 T1 PHYSICS, APPLIED 6 / 179 = 0.034 2023 Q1 T1 9.191 2023 Materials Science (miscellaneous) 2023 Q1 Nanoscience and Nanotechnology 2023 Q1 Mechanics of Materials 2023 Q1 Mechanical Engineering 2023 Q1 43.0 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Roy, Abhijit Universidad de Zaragoza Tripathi, Manoj Aljarid, Adel K.A. Salvage, Jonathan P. Roe, S. Mark Arenal, Raul (orcid)0000-0002-2071-9093 Boland, Conor S. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 35, 39 (2023), 2303570 [10 pp.] Adv. mater. Advanced materials 0935-9648 2355468 http://zaguan.unizar.es/record/127124/files/texto_completo.pdf Versión publicada 2597786 http://zaguan.unizar.es/record/127124/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:127124 articulos driver 2024-11-22-12:10:05 ARTICLE