Demonstration of defect-free and composition tunable GaxIn₁-xSb nanowires

Autor: Sepideh, Gorji Ghalamestani, Martin, Ek, Bahram, Ganjipour, Claes, Thelander, Jonas, Johansson, Philippe, Caroff, Kimberly A, Dick
Rok vydání: 2012
Předmět:
Zdroj: Nano letters. 12(9)
ISSN: 1530-6992
Popis: The Ga(x)In(1-x)Sb ternary system has many interesting material properties, such as high carrier mobilities and a tunable range of bandgaps in the infrared. Here we present the first report on the growth and compositional control of Ga(x)In(1-x)Sb material grown in the form of nanowires from Au seeded nanoparticles by metalorganic vapor phase epitaxy. The composition of the grown Ga(x)In(1-x)Sb nanowires is precisely controlled by tuning the growth parameters where x varies from 1 to ∼0.3. Interestingly, the growth rate of the Ga(x)In(1-x)Sb nanowires increases with diameter, which we model based on the Gibbs-Thomson effect. Nanowire morphology can be tuned from high to very low aspect ratios, with perfect zinc blende crystal structure regardless of composition. Finally, electrical characterization on nanowire material with a composition of Ga(0.6)In(0.4)Sb showed clear p-type behavior.
Databáze: OpenAIRE