Available student project - Synthesis of semiconductor nanowires for novel device applications

Research fields

  • Nanoscience and Nanotechnology
  • Materials Science and Engineering

Project details

The excitement of nanowire research is due to the unique structural, electronic and optical properties of these nanostructures. They have extremely large surface area which leads to ultra-high surface reaction efficiency. Changing the surface conditions by surface reactions with chemicals, gases and biological substances including DNA/viruses can lead to the large changes in nanowire properties. In addition, axial and radial (core-shell) heterostructure nanowires have been proposed for future microelectronic and optoelectronic devices. Nanowire devices such as lasers, resonant tunneling diodes, and single electron transistors have been demonstrated. Indeed, nanowires have a broad range of applications, which encompasses many science and engineering areas such as electronics, photonics, bio and medical technologies. The success of nanowires as building blocks for nano-devices relies on the development of controlled growth of these materials.

These nanowires are usually grown by the so-called vapour-liquid-solid (VLS) mechanism, which relies on a metal nanoparticle to catalyse and seed the growth. An alternative way to grow the nanowires is by the selective area epitaxy (SAE) technique, where a dielectric mask is first patterned on the substrate prior to growth.

The aims of project are to (i) develop and understand the VLS and SAE mechanisms of III-V semiconductor nanowires; (ii) control the growth of axial and radial nanowire heterostructures and superlattices to engineer the band structure and quantum confinement effect; (iii) grow nanowires on Si substrates; and (iv) demonstrate the prototype novel nanowire devices (such as LEDs, solar cells and biosensors).

Required background

Physics, Material Science, Engineering

Project suitability

This research project can be tailored to suit students of the following type(s)
  • PhB (2nd or 3rd year)
  • Honours project
  • Phd or Masters

Contact supervisor

Tan, Hoe profile
Head of Department

Other supervisor(s)

Caroff, Philippe  profile
Fellow & ARC Future Fellow

Updated:  17 August 2017/ Responsible Officer:  Director, RSPE/ Page Contact:  Physics Webmaster