RT Journal Article
T1 Visible cathodoluminescence from mechanically milled germanium
A1 Nogales Díaz, Emilio
A1 Montone, A.
A1 Cardellin, F.
A1 Méndez Martín, María Bianchi
A1 Piqueras De Noriega, Francisco Javier
AB There. 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.
PB Iop Publishing Ltd
SN 0268-1242
YR 2002
FD 2002-12
LK https://hdl.handle.net/20.500.14352/58925
UL https://hdl.handle.net/20.500.14352/58925
LA eng
NO © 2002 IOP Publishing Ltd.This work was supported byMCYT (project MAT 2000-2119).
NO MCYT
DS Docta Complutense
RD 6 abr 2025