项目来源

巴西圣保罗研究基金(FAPESP)

项目主持人

Edson Roberto Leite

项目受资助机构

Centro Nacional de Pesquisa em Energia e Materiais.Ministério da Ciência,Tecnologia e Inovação.Campinas,SP,Brazil

项目编号

22/11161-4

立项年度

2023

立项时间

未公开

研究期限

未知 / 未知

项目级别

国家级

受资助金额

未知

学科

Engineering

学科代码

未公开

基金类别

Scholarships abroad-Research Internship-Post-doctor

关键词

Cerâmicas ; Nanotecnologia ; Perovskita ; Filmes finos ; Materiais cerâmicos ; Energia renovável ; Meio ambiente ; Materiais nanoestruturados ; Catálise ; Microscopia eletrônica de transmissão ;

参与者

Tanna Elyn Rodrigues Fiuza；Rafal Edward Dunin-Borkowski

参与机构

Forschungszentrum Jülich,Germany

项目标书摘要：The constant demand for new materials and the enhancement of their properties have been boosted by the upgrading of characterization tools.Among them,transmission electron microscopy(TEM)has been highlighted due to the possibility of joining images with spectroscopic and structural analyses.Additionally,the improvement of atomic resolution by spherical aberration correction and the development of in situ sample holders have been crucial for unveiling new materials and behaviors.Recently,the development of new cameras(CCD or direct detector)with a high dynamic range for scanning TEM has allowed the collection of four-dimensional data from different samples,including those sensitive to the electron beam.The 4D data is a 2D spatial image in which each pixel has an image of the electron scattering in the reciprocal space(2Dx2D).This way,the 4D data are rich in information,including signatures of the local structure,orientation,deformation,and electromagnetic fields.We intend to study the role of small amounts of Sn in ITO nanoparticles in the ITO sintering compared with the pure In2O3.We expect that the 4D-STEM experiment will shed light on the sintering at the nanoscale,for instance,if there are grains that preferentially induce the pore elimination while others halt the densification.We will also study a sample sensitive to the electron beam,with great difficulty obtaining results with conventional STEM.As an exciting example,we intend to study hybrid perovskites(focusing on surface stability and structural details)since they have technological importance for solar cells.The study of two different systems will allow the implementation of the 4D-STEM technique at LNNano for intern and extern users from the microscopy facilities for a wide range of samples.The BEPE at ER-C will provide the expertise needed to carry out the project since the host group has high knowledge in the 4D-STEM data analysis and processing.(AU)

Application Abstract: The constant demand for new materials and the enhancement of their properties have been boosted by the upgrading of characterization tools.Among them,transmission electron microscopy(TEM)has been highlighted due to the possibility of joining images with spectroscopic and structural analyses.Additionally,the improvement of atomic resolution by spherical aberration correction and the development of in situ sample holders have been crucial for unveiling new materials and behaviors.Recently,the development of new cameras(CCD or direct detector)with a high dynamic range for scanning TEM has allowed the collection of four-dimensional data from different samples,including those sensitive to the electron beam.The 4D data is a 2D spatial image in which each pixel has an image of the electron scattering in the reciprocal space(2Dx2D).This way,the 4D data are rich in information,including signatures of the local structure,orientation,deformation,and electromagnetic fields.We intend to study the role of small amounts of Sn in ITO nanoparticles in the ITO sintering compared with the pure In2O3.We expect that the 4D-STEM experiment will shed light on the sintering at the nanoscale,for instance,if there are grains that preferentially induce the pore elimination while others halt the densification.We will also study a sample sensitive to the electron beam,with great difficulty obtaining results with conventional STEM.As an exciting example,we intend to study hybrid perovskites(focusing on surface stability and structural details)since they have technological importance for solar cells.The study of two different systems will allow the implementation of the 4D-STEM technique at LNNano for intern and extern users from the microscopy facilities for a wide range of samples.The BEPE at ER-C will provide the expertise needed to carry out the project since the host group has high knowledge in the 4D-STEM data analysis and processing.(AU)