UNIDEF   23986
UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICO PARA LA DEFENSA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Born Again vs. IsGisaxs: Application of these popular softwares in the characterization of nanopores embedded in ZnO films
Autor/es:
C. BOJORGE; E. HEREDIA; H. CÁNEPA
Lugar:
Campinas
Reunión:
Congreso; Annual Users Meeting LNLS/CNPEM (27th RAU); 2017
Institución organizadora:
Laboratorio Nacional de Luz Sincrotrón
Resumen:
Grazing-Incidence Small-Angle X-ray Scattering (GISAXS) is a surface scattering technique used to characterize the nanostructure of thin films. It is a versatile and powerful technique, which enables studies of nanoscale objects. These nanoparticles can be deposited on the surface or embedded in the film. GISAXS patterns provide information about the shape, size and distribution of nanoparticles.Among the available techniques, the use of X ray scattering in the grazing incidence geometry is complementary to electronic microscopy techniques and presents several advantages: ?an averaged statistical information over all the sample;?the technique can be applied in any kind of environments ranging from ultra-high vacuum to gas atmospheres;?kinetic studies can be undertaken as function of temperature, gas pressure, etc.?using the variable probed depth as function of the incidence angle, GISAXS offer the opportunity to characterize buried particles or interfaces.In this work we present and compare GISAXS results obtained by using the free softwares Isgisaxs [1] and Born Again [2] for the analysis of nanopores embedded in ZnO thin films. IsGisaxs was widely used but its last update was made in the last decade. Although it delivers reliable results, this software operates under an unfriendly interface. On the contrary, Born Again is a new software which is periodically updated working in a very simple and visual way. Both programs allow modeling. By fitting selected parameters, it is possible to obtain the characteristics of the nanoparticles contained in the films.Data collection using Gisaxs images was performed on the XRD2 line of the LNLS facilities.[1] R. Lazzari, IsGISAXS: a program for grazing-incidence small-angle X-ray scattering analysis from supported islands, J. Appl. Cryst. 35 (2002) 406-421,http://www.insp.jussieu.fr/oxydes/IsGISAXS/isgisaxs.htm, Version 2.6.[2] J. Burle, C. Durniak, J. M. Fisher, M. Ganeva, G. Pospelov, W. Van Herck, J. Wuttke (2017), BornAgain - Software for simulating and fitting X-ray and neutron small-angle scattering at grazing incidence, http://www.bornagainproject.org, Version 1.8.1.