
(3) ICREA-Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain. de Bellaterra, E-08193, Bellaterra, Spain (2) Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus Univ. de Bellaterra, E-08193, Bellaterra, Spain. (1) Institut Català de Nanociencia i Nanotecnologia,ICN2, Campus Univ. Case Study 3: In-situ XRD by applying voltage in VO 2 thin filmsĪuthors: Laura Rodriguez (1), José Santiso (1), Jessica Padilla-Pantoja (1), Jose Manuel Caicedo (1), Felip Sandiumenge (2), and Gustau Català (1)(3) (Right) Experimental and simulated X-ray reflectivity curves of nanocellulose thin film on a silicon substrate under vacuum and wet nitrogen atmosphere. (Left) Monitoring of nanocellulose thin film in humidity chamber at vacuum (black lines) and at wet nitrogen flow (blue lines). The fitting of the reflectivity data of the thin film after 2 hours in vacuum and after 2 hours under a wet nitrogen flow revealed a change in film thickness from 55 to 65 nm. After 2 hours a wet nitrogen flow has been applied and the changes in reflectivity have been followed.
#Crystal diffraction in spanish full#
Scheme of Humidity chamber for in-situ x-ray reflectometry.įirst, a cellulose thin film has been monitored in vacuum for 2 hours, measuring a full reflectivity curve every 40 seconds. Measurements have been in vacuum and in a wet nitrogen flow using a graphene dome for atmospheric control.

Results show cellulose film thickness variations during water uptake at different humidity measured in-situ by XRR. Still, open challenges in engineering its intrinsic properties remain to address. Nanofibrillated cellulose, a polymer that can be obtained from one of the most abundant biopolymers in nature, is being increasingly explored due to its outstanding properties for packaging and device applications. ICN2 Phononic and Photonic Nanostructures (P2N) Group have proved the water uptake of cellulose thin films using in-situ X-ray reflectometry. (2) Institut Català de Nanociencia i Nanotecnologia,ICN2, Campus Univ. (1) ALBA Synchrotron Light Source, 08290 Cerdanyola del Vallès, Barcelona, Spain
#Crystal diffraction in spanish pro#
Malvern PANalytical X’pert Pro MRD Case Study 2: Water uptake of cellulose thin filmsĪuthors: Martin Kreuzer(1) and Monica Lira(2) Schematic description of the crystal structure evolution during the process of postsynthetic modification of multivariate Zr-fcu-MOFs via solid–gas ozonolysis. 2018ĭOI: 10.1021/jacs.8b09682 Powder X-Ray Difraction for mixed-ligand Zr-fcu-MOFs and ozonated MOF, measured at the XRD ICN2 facility. Compared to the corresponding highly microporous starting MOFs, the highly mesoporous product MOFs exhibit radically distinct gas sorption properties although the crystallinity is totally preserved as we demonstrated using powder diffraction techniques. Depending on the cleavable ligand used, the resultant ligand-fragments can be removed from the ozonated MOF by either washing or sublimation. Then, we were able to selectively break the cleavable ligand via ozonolysis to trigger fusion of micropores into mesopores within the MOF framework. We carefully selected mixed-ligand Zr-fcu-MOFs based on organic ligand pairs in which one ligand has ozone-cleavable olefin bonds and the other ligand is ozone-resistant.

The objective of the present work was the postsynthetic generation of mesoporosity in metal–organic frameworks (MOFs) using ozone-based method developed in the Supramolecular nanochemistry and materials group (NANOUP). Institut Català de Nanociencia i Nanotecnologia,ICN2, Campus Univ. Malvern PANalytical X’pert Pro MPD Case study 1Īuthors: Vincent Guillerm, Heng Xu, Jorge Albalad, Inhar Imaz, and Daniel Maspoch
