TaSi2 nanowires: A potential field emitter and interconnect

Area of Science:

• Materials Science
• Nanotechnology
• Solid State Physics

Background:

• Tantalum silicide (TaSi2) is a metallic compound with potential applications in electronics.
• Efficient synthesis methods for TaSi2 nanowires are crucial for their integration into devices.

Purpose of the Study:

• To synthesize TaSi2 nanowires on a silicon substrate.
• To investigate the field-emission properties and electrical characteristics of the synthesized nanowires.
• To explore the effects of annealing parameters on nanowire growth.

Main Methods:

• Synthesis of TaSi2 nanowires by annealing NiSi2 films in a tantalum vapor environment at 950°C.
• Characterization of nanowire length and field-emission properties using specialized equipment.
• Analysis of annealing temperature effects and the role of a metal silicide mediation layer.

Main Results:

• TaSi2 nanowires up to 13 micrometers in length were successfully grown.
• Low turn-on field (4-4.5 V/microm) and threshold field (6 V/microm) were observed.
• A high field enhancement factor of 1800 and a high failure current density (3 x 10^8 A cm^-2) were achieved.

Conclusions:

• A simple and effective method for synthesizing TaSi2 nanowires was developed.
• The synthesized TaSi2 nanowires possess excellent electrical and field-emission properties.
• This approach holds significant potential for future applications in nanoelectronics and nano-optoelectronics.