Characterisation of niobium and vanadium hydrides by electron energy loss spectroscopy and by STEM |
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| Affiliation: | 1. Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, China;2. Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China;1. Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam;2. Key Laboratory of Advanced Materials for Energy and Environmental Applications, Lac Hong University, Bien Hoa, 810000, Viet Nam;3. Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 700000, Viet Nam;1. Programa de Pós-graduação em Ciência e Engenharia de Materiais, Universidade Federal de São Carlos, Rod. Washington Luiz, km 235, SP-310, CEP 13565-905, São Carlos, SP, Brazil;2. Departamento de Engenharia de Materiais, Universidade Federal de São Carlos (UFSCar), Rod. Washington Luis, km 235, SP-310, CEP 13565-905, São Carlos, SP, Brazil;3. Departamento de Engenharia Metalúrgica e Materiais, Universidade Federal de Minas Gerais, Rua Espirito Santo, 35, CEP 30160-030, Belo Horizonte, MG, Brazil;4. Laboratório Nacional de Luz Síncrotron (LNLS), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Rua Giuseppe Máximo Scolfaro, 10000, Campinas, SP, CP 6192, CEP 13083-970, Campinas, SP, Brazil;1. Sustainable Infrastructure Research and Development Center and Department of Industrial Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40002, Thailand;2. Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand;3. Spectroscopic and Sensing Devices Research Group, National Electronics and Computer Technology Center, Pathum Thani, 12120, Thailand;1. Universidad de San Martín de Porres, Sociedad Científica de Estudiantes de Medicina, Lima, Peru;2. Universidad de San Martín de Porres, Facultad de Medicina Humana, Centro de Investigación del Envejecimiento (CIEN), Lima, Peru;3. Bamboo Seniors Health Services, Lima, Peru;4. Universidad Cientifica del Sur, Facultad de Ciencias de la Salud, Lima, Peru;5. Internal Medicine/Geriatrics – Sealy Center on Aging, University of Texas Medical Branch, Galveston, USA;6. Department of Geriatrics, Hospital Universitario de Getafe, Madrid, Spain |
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| Abstract: | The transmission electron energy loss spectra from hydrogen-containing vanadium and niobium are compared with those from the pure metals. The hydrogen induces an additional small energy loss peak at very low energies, well below that due to the plasmon loss. This peak can be interpreted as due to a band of states induced by the hydrogen several eV below the conduction bands of the metal. Because these experiments are performed in a STEM, it is possible to verify the structure of the hydride by electron microscopy and diffraction and to be certain that the energy-loss spectra come from well characterised material. |
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