Germanium Nanocrystals Embedded in Sapphire

Colloidal synthesis of germanium nanocrystals

In this study, colloidal germanium nanocrystals were synthesized by a simple and novel method, and their optical properties were also studied. Polyvinyl alcohol (PVA) as a surface modifier was used to control the optical properties of colloidal Ge nanocrystals. Fourier transform infrared spectroscopy (FTIR) analysis was performed to identify the various functional groups present in the sample. ...

Size-effect of germanium nanocrystals

Different sizes of Ge nanocrystals embedded in a SiO2 matrix were formed by PECVD, and analyzed by TEM. Size effect of Ge nanocystals was demonstrated by Raman spectroscopy after excluding the thermal effect. OCIS codes: (160.4236) nanomaterial; (160.6000) semiconductor material;

Study of Stress Evolution of Germanium Nanocrystals embedded in Silicon Oxide Matrix

Germanium (Ge) nanocrystals had been synthesized by annealing co-sputtered SiO2-Ge in N2 and/or forming gas (90% N2 + 10% H2) at temperatures ranging from 700 to 1000°C from 15 to 60 min. It was concluded that the annealing ambient, temperature and time have a significant influence on the formation and evolution of the nanocrystals. We also showed that a careful selective etching of the anneale...

Multiscale Modeling of Formation and Structure of Oxide Embedded Silicon and Germanium Nanocrystals

Silicon and germanium nanocrystals: properties and characterization

Group-IV nanocrystals have emerged as a promising group of materials that extends the realm of application of bulk diamond, silicon, germanium and related materials beyond their traditional boundaries. Over the last two decades of research, their potential for application in areas such as optoelectronic applications and memory devices has been progressively unraveled. Nevertheless, new challeng...