0435063 - ÚFCH JH 2015 RIV DE eng J - Článek v odborném periodiku
Smith, R. L. - Eliášová, Pavla - Mazur, Michal - Attfield, M. P. - Čejka, Jiří - Anderson, M. W.
Atomic Force Microscopy of Novel Zeolitic Materials Prepared by Top-Down Synthesis and ADOR Mechanism.
Chemistry - A European Journal. Roč. 20, č. 33 (2014), s. 10446-10450. ISSN 0947-6539. E-ISSN 1521-3765
Grant CEP: GA ČR GBP106/12/G015
Institucionální podpora: RVO:61388955
Klíčová slova: assembly * atomic force microscopy * top-down synthesis
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 5.731, rok: 2014 ; AIS: 1.433, rok: 2014
DOI: https://doi.org/10.1002/chem.201402887

Top-down synthesis of 2D materials from a parent 3D zeolite with subsequent post-synthetic modification is an interesting method for synthesis of new materials. Assembly, disassembly, organisation, reassembly (ADOR) processes towards novel materials based on the zeolite UTL are now established. Herein, we present the first study of these materials by atomic force microscopy (AFM). AFM was used to monitor the ADOR process through observation of the changes in crystal surface and step height of the products. UTL surfaces were generally complex and contained grain boundaries and low-angle intergrowths, in addition to regular terraces. Hydrolysis of UTL to IPC-1P did not have adverse effects on the surfaces as compared to UTL. The layers remained intact after intercalation and calcination forming novel materials IPC-2 and IPC-4. Measured step heights gave good correlation with the X-ray diffraction determined d(200)-spacing in these materials. However, swelling gave rise to significant changes to the surface topography, with significantly less regular terrace shapes. The pillared material yielded the roughest surface with ill-defined surface features. The results support a mechanism for the majority of these materials in which the UTL layers remain intact during the ADOR process as opposed to dissolving and recrystallising during each step.
Trvalý link: http://hdl.handle.net/11104/0238979