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Visible cathodoluminescence from mechanically milled germanium

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dc.contributor.authorNogales Díaz, Emilio
dc.contributor.authorMontone, A.
dc.contributor.authorCardellin, F.
dc.contributor.authorMéndez Martín, María Bianchi
dc.contributor.authorPiqueras De Noriega, Francisco Javier
dc.date.accessioned2023-06-20T18:55:12Z
dc.date.available2023-06-20T18:55:12Z
dc.date.issued2002-12
dc.description© 2002 IOP Publishing Ltd. This work was supported byMCYT (project MAT 2000-2119).
dc.description.abstractThere. has been interest in the past years in the visible luminescence properties of germanium nanocrystals. Most of the previous works refer to Ge nanocrystals embedded in an oxide matrix. In this work nanocrystalline germanium has been prepared by high-energy ball milling of Ge single crystals and Ge powder. The structure of the milled samples has been assessed by x-ray diffraction (XRD) and transmission electron microscopy (TEM) while the luminescence has been investigated by cathodoluminescence (CL) in the scanning electron microscope (SEM). The samples consist of a powder of particles with sizes of hundreds of nanometres, normally aggregated to form larger particles. TEM reveals that the particles consist of nanocrystals with a wide range of sizes including crystallites of some nanometres. Milled Ge shows two CL bands at about 2.4-2.5 eV and 3.1 eV, respectively. Both emissions appear to be related to the presence of Ge nanocrystals. The CL of untreated and milled GeO_2 powder has been also investigated for comparison.
dc.description.departmentDepto. de Física de Materiales
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMCYT
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/24435
dc.identifier.doi10.1088/0268-1242/17/12/310
dc.identifier.issn0268-1242
dc.identifier.officialurlhttp://iopscience.iop.org/0268-1242/17/12/310
dc.identifier.relatedurlhttp://iopscience.iop.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/58925
dc.issue.number12
dc.journal.titleSemiconductor Science and Technology
dc.language.isoeng
dc.page.final1271
dc.page.initial1267
dc.publisherIop Publishing Ltd
dc.relation.projectIDMAT 2000-2119
dc.rights.accessRightsopen access
dc.subject.cdu538.9
dc.subject.keywordLuminescence Properties
dc.subject.keywordOptical-Properties
dc.subject.keywordOxide-Films
dc.subject.keywordGlassy SiO_2
dc.subject.keywordPhotoluminescence
dc.subject.keywordSilicon
dc.subject.keywordGe
dc.subject.keywordNanocrystals
dc.subject.keywordCrystalline
dc.subject.keywordSize
dc.subject.ucmFísica de materiales
dc.titleVisible cathodoluminescence from mechanically milled germanium
dc.typejournal article
dc.volume.number17
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