Observation of oxide precipitates in InN nanostructures

Characterization of oxide precipitates in epitaxial InN by transmission electron microscopy

InN thin films have been grown epitaxially on GaN-buffered sapphire substrates by molecular-beam epitaxy at 500 °C. A high level of oxygen contamination in the growth chamber led to formation of In2O3 precipitates in the films. These precipitates were characterized in detail by transmission electron microscopy TEM . The concentration of In2O3 was estimated to be less than 0.07 vol % in the pres...

Direct observation of precipitates and self-organized nanostructures in molecular-beam epitaxy grown heavily doped GaAs:Si

We report a cross-sectional scanning tunneling microscopy investigation of heavily Si doped @001#-oriented GaAs grown by molecular-beam epitaxy. At a very high doping level (6 310 cm), Si-doping induced precipitates are directly observed in XSTM images of the as-grown epitaxial layers. Most of the precipitates are found to have a characteristic oval shape with the long axis ~;80 Å! along the gr...

synthesis of platinum nanostructures in two phase system

چکیده پلاتین، فلزی نجیب، پایدار و گران قیمت با خاصیت کاتالیزوری زیاد است که کاربرد های صنعتی فراوانی دارد. کمپلکس های پلاتین(ii) به عنوان دارو های ضد سرطان شناخته شدند و در شیمی درمانی بیماران سرطانی کاربرد دارند. خاصیت کاتالیزوری و عملکرد گزینشی پلاتین مستقیماً به اندازه و- شکل ماده ی پلاتینی بستگی دارد. بعضی از نانو ذرات فلزی در سطح مشترک مایع- مایع سنتز شده اند، اما نانو ساختار های پلاتین ب...

INOmax, INN-nitric oxide

Probing Nucleation Mechanism of Self-Catalyzed InN Nanostructures

The nucleation and evolution of InN nanowires in a self-catalyzed growth process have been investigated to probe the microscopic growth mechanism of the self-catalysis and a model is proposed for high pressure growth window at ~760 Torr. In the initial stage of the growth, amorphous InNx microparticles of cone shape in liquid phase form with assistance of an InNx wetting layer on the substrate....