Antimonide

About: Antimonide is a research topic. Over the lifetime, 972 publications have been published within this topic receiving 10981 citations. The topic is also known as: antimonides.

Optically active dilute-antimonide III-nitride nanostructures for optoelectronic devices

Abstract: We have studied the epitaxy, energy bandgap, and structural and optical properties of GaSbN nanostructures in the dilute antimony (Sb) limit (Sb concentration < 1%). GaSbN nanowire structures are grown on a Si substrate by plasma-assisted molecular beam epitaxy. It is observed, both theoretically and experimentally, that the incorporation of a very small amount of Sb (<1%) in GaN can substantially reduce the energy bandgap of GaN from 3.4 eV to ∼2 eV. We have further demonstrated that emission wavelengths of GaSbN nanowires can be tuned from ∼365 nm to 600 nm at room-temperature by varying the Sb incorporation. Functional GaSbN nanowire light-emitting diodes are also demonstrated, which exhibit strong emission in the deep-visible spectral range.

Anisotropic manganese antimonide nanoparticle formation by solution–solid–solid growth mechanism: consequence of sodium borohydride addition towards reduced surface oxidation and enhanced magnetic moment

Abstract: A new approach to the solution-phase synthesis of manganese antimonide nanoparticles was developed to reduce competitive oxide formation by exploitation of sodium borohydride (NaBH4) (0.53-2.64 mmol) as a sacrificial reductant. However, in the presence of near-stoichiometric precursor amounts of manganese carbonyl and triphenyl antimony, the introduction of NaBH4 results in a different growth mechanism, Solution-Solid-Solid (SSS), leading to tadpole-shaped manganese antimonide nanoparticles with antimony-rich heads and stoichiometric manganese antimonide tails. We hypothesize that a solid antimony-rich manganese antimonide cluster acts as an initiator to tail growth in solution. Notably, the length of the tail correlated with the amount of NaBH4 used. Interestingly, these anisotropic particles can be transformed progressively into spherical-shaped nanoparticles upon the addition of excess manganese carbonyl. The anisotropic manganese antimonide particles possess saturation magnetizations ca. twenty times higher than that reported for MnSb nanoparticles prepared without NaBH4, attributed to limitation of oxidation.

Interband cascade lasers grown on GaAs substrates lasing at 4 microns

Abstract: Antimonide-based type II interband cascade lasers grown on GaAs substrates have been demonstrated at emission wavelengths longer than 4μm at temperatures up to 270K in pulsed-mode operation. Investigations by transmission electron microscopy, atomic force microscopy and x-ray diffraction are presented and discussed to gain insights into material issues such as defects and dislocations associated with device performance.