Back to Search
Start Over
Synthesis and optical properties of single crystalline GaN nanorods with a rectangular cross-section
- Source :
-
Solid State Communications . Aug2006, Vol. 139 Issue 8, p387-390. 4p. - Publication Year :
- 2006
-
Abstract
- Abstract: GaN nanorods were synthesized from the reaction of a Ga/Ga2O3 mixture with NH3 on Si substrates by chemical vapor deposition. The synthesized products were characterized by scanning and transmission electron microscopy, X-ray diffraction, photoluminescence and Raman spectroscopy. The nanorods are highly single crystalline and possess uniform smooth surfaces. PL revealed only a strong emission at 3.268 eV, ascribed to free exciton (FX) transitions, at room temperature; while the well-known yellow luminescence band centered at 2.2–2.3 eV was not detected. Four first-order phonon modes, corresponding to the A1(TO), E1(TO), E2(high), and A1(LO) at ∼531, 554, 564, and 721 cm−1, respectively, were observed by Raman backscattering. The red-shift of the FX emission peak and the down-shifts of the Raman modes by a few wave numbers are attributed to the presence of tensile strain inside GaN nanorods. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00381098
- Volume :
- 139
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Solid State Communications
- Publication Type :
- Academic Journal
- Accession number :
- 21857759
- Full Text :
- https://doi.org/10.1016/j.ssc.2006.07.004