Abstract
We report a unique growth of platelet-shaped nanoscale tips of transparent dielectric using femtosecond laser radiation at MHz pulse repetition rate with nitrogen background gas flow under ambient condition. The tips grew with sharp nanoscale apex while their base and lengths are of the order of few hundred nanometers. In the absence of nitrogen, the irradiation leads to nanofibrous structure formation. The collision between the nitrogen gas atoms and the vapor species slows down plume expansion and lead to an increase of nanoparticles size. This prevents the fibrous structure formation and provides appropriate condition for nanoscale tips growth.
Highlights
Nanoscale tips, wires, tubes and rods of semiconductor, ceramic and dielectric materials have been investigated for applications such as probes for scanning probe microscopy, emitters for field-emission-based devices and solar cells [1]
We report a unique growth of platelet-shaped nanoscale tips of transparent dielectric using femtosecond laser radiation at MHz pulse repetition rate with nitrogen background gas flow under ambient condition
The tips grew with sharp nanoscale apex while their base and lengths are of the order of few hundred nanometers
Summary
Wires, tubes and rods of semiconductor, ceramic and dielectric materials have been investigated for applications such as probes for scanning probe microscopy, emitters for field-emission-based devices and solar cells [1]. There is a significant amount of ongoing research on selective and sensitive optical nanosensors of biological agents. In this context, the current emerging trend in nanoscale research is: controlled synthesis with well-. Tan Department of Aerospace Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
