Nucleation and growth of nanoparticles during pulsed laser deposition in an ambient gas

Abstract

We present a method to determine where the nanoparticles nucleate and grow during pulsed laser deposition in an ambient gas. Briefly, nanocrystalline Si films are systemically deposited on the substrates located at a distance from the plasma and placed in horizontal direction; meanwhile an external electric field is introduced perpendicularly to the plume. Based on the transportation dynamics of Si nanoparticles corresponding to different electric fields, the lateral nucleation range of 0.1 to 33.8 mm is determined for Si nanoparticles deposited in 10 Pa Ar gas at a laser fluence of 4 J/cm 2 . Further simulation of the mass and area density of Si nanoparticles demonstrates that both nucleation and growth probabilities in nucleation region are approximately Gauss-dependent of the lateral distance.

Overview of Synthetic Methods to Prepare Plasmonic Transition‐Metal Nitride Nanoparticles

“…The mechanisms for nucleation and growth process have been discussed, in detail,elsewhere. [31,32] Reinholdt et al showed that irradiatingapressed TiNp owder target with aN d:YAGl aser formed cuboid-shaped particlesb yu sing transmission electron microscopy (TEM) ( Figure 2A). [33] The particles were crystalline and below 10 nm in size, with ar elativelyb road size distribution.…”

Monte Carlo Simulation of Laser-Ablated Particle Splitting Dynamic in a Low Pressure Inert Gas

“…The density and velocity distributions are obtained and the formation mechanism of the velocity splitting is also analyzed [11] . The pressure, however, is much higher than that in most of the experiments [12,13] , and the formation mechanism of the two splitting cycles was not distinguished. The gas pressure is a key parameter which influences the ablated-particle density and velocity distributions, and the structural properties of the nanoparticles [14,15] .…”

Tuning the morphology of manganese oxide nanostructures for obtaining both high gravimetric and volumetric capacitance

“…34,35 Pulsed laser deposition (PLD) in the presence of a buffer gas has been reported as a versatile tool for fabricating nanoparticles and other nanostructures with controlled size. [36][37][38] This technique is used to synthesize MO electrodes as well. [39][40][41][42] Yang synthesized MOs using manganese metallic and Mn 3 O 4 targets in an O 2 atmosphere with pressures ranging from 1 mTorr to 0.5 Torr and obtained crystalline phases of Mn 2 O 3 , Mn 3 O 4 and amorphous MnO x .…”