Size-independent Young's modulus of inverted conical GaAs nanowire resonators

Size-independent Young’s modulus of inverted conical GaAs nanowire resonators

We explore mechanical properties of top down fabricated, singly clamped inverted conical GaAs nanowires. Combining nanowire lengths of 2–9 lm with foot diameters of 36–935 nm yields fundamental flexural eigenmodes spanning two orders of magnitude from 200 kHz to 42 MHz. We extract a size-independent value of Young’s modulus of (456 3) GPa. With foot diameters down to a few tens of nanometers, t...

GaAs/AlGaAs nanowire photodetector.

We demonstrate an efficient core-shell GaAs/AlGaAs nanowire photodetector operating at room temperature. The design of this nanoscale detector is based on a type-I heterostructure combined with a metal-semiconductor-metal (MSM) radial architecture, in which built-in electric fields at the semiconductor heterointerface and at the metal/semiconductor Schottky contact promote photogenerated charge...

Gallium Nitride Nanowire Electromechanical Resonators

High gain single GaAs nanowire photodetector

Evolution of morphology and microstructure of GaAs/GaSb nanowire heterostructures

In this paper, we successfully grow GaAs/GaSb core-shell heterostructure nanowires (NWs) by molecular beam epitaxy (MBE). The as-grown GaSb shell layer forms a wurtzite structure instead of the zinc blende structure that has been commonly reported. Meanwhile, a bulgy GaSb nanoplate also appears on top of GaAs/GaSb core-shell NWs and possesses a pure zinc blende phase. The growth mode for core-s...