scholarly journals Growth of Nanosize and Colloid Particles by Controlled Addition of Singlets

2001 ◽  
Vol 701 ◽  
Author(s):  
Vladimir Privman
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Time Evolution ◽  
Nanoparticle Synthesis ◽  
Building Blocks ◽  
Theoretical Framework ◽  
Master Equations ◽  
Growth Mode ◽  
Yield Information

ABSTRACTWe outline a theoretical framework for estimating the evolution of the particle size distribution in colloid and nanoparticle synthesis, when the primary growth mode is by externally controlled addition of singlet building blocks. The master equations, analyzed in the leading “non-diffusive” expansion approximation, are reduced to a set of easily numerically programmable relations that yield information on the time evolution of the particle size distribution.

Transport Methods of Determining Particle Size Distributions in Colloidal Systems

1981 ◽  
Vol 54 (4) ◽  
pp. 882-891 ◽  
Author(s):  
C. D. Shuster ◽  
J. R. Schroeder ◽  
D. McIntyre
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Size Range ◽  
Size Distributions ◽  
Rotor Speed ◽  
Colloidal Systems ◽  
Particle Size Distributions ◽  
Density Distributions ◽  
Yield Information

Abstract The two techniques examined in this work yield information about the particle size distribution of the latexes studied. The ease of measurement is improved over previous methods used on broadly distributed latexes. The TPC curves for both the natural and synthetic latexes correlate with the centrifuge curves. Both techniques show the Hevea to have larger particles than the guayule. The techniques also show SBR latex samples 1 and 2 to have larger particles than samples 3 and 4. The TPC is useful only for particles between 0.3 µm and 20 µm in size. The centrifuge can be used for any size range of particles by altering the rotor speed or eluant density. By employing the proper mathematics, these data could be easily converted from optical density distributions to particle size distributions.

scholarly journals Nanoparticles Size Distribution Assessment During Early Synthesis Stages

2021 ◽  
Vol 343 ◽  
pp. 01005
Author(s):  
Dan Chicea ◽  
Mirela Maria Codescu ◽  
Alexandra Nicolae ◽  
Oleksandr Doroshkevych ◽  
Akhmed Islamov ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Particle Tracking ◽  
Nanoparticle Synthesis ◽  
Particle Tracking Method ◽  
Transmission Electron ◽  
Long Time ◽  
Time Required ◽  
Strong Antibacterial Effect

Nanotechnology, an innovative field of material science, designs and produces nanostructures materials with unique properties that make them suited for various bioengineering applications. The shape and the dimension are the main variables depending on the method of synthesis or chemical precursors. Silver nanoparticles obtained through chemical synthesis exhibit as strong antibacterial effect if their size lays in a well-defined range. However, a small size of such particles, in the range of nanometers to several tens of nanometers, requires specific techniques as Dynamic Light Scattering or Transmission Electron Microscopy, both being affected by certain assumptions or by the high cost and long time required for a measurement. A nonconventional method based on Direct Particle Tracking can be used to produce the particle size distribution in the early nanoparticle synthesis stages. The work presents a realistic computer simulation of nanoparticle diffusion performed with the CHODIN code and a size distribution assessment using a code for Direct Particle Tracking written for this purpose. The results are consistent with the particle size used for simulation and states as a proof of concept for using the Direct Particle Tracking method for particle size distribution in the early stages of nanoparticle synthesis.

Temperature Effect on the Stability of CuO Nanofluids Based on Measured Particle Distribution

2005 ◽  
Vol 295-296 ◽  
pp. 51-56 ◽  
Author(s):  
Ho Chang ◽  
Chih Hung Lo ◽  
Tsing Tshih Tsung ◽  
Y.Y. Cho ◽  
D.C. Tien ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Copper Oxide ◽  
Temperature Effect ◽  
Size Distribution ◽  
Nanoparticle Synthesis ◽  
Experimental Result ◽  
Size Change ◽  
Normal Fluid ◽  
Environment Temperature

This study aims to investigate the temperature effect on particle size of copper oxide nanofluid produced under optimal parameters of the Arc Spray Nanoparticle Synthesis System (ASNSS) developed in this research. The purpose is to understand the aggregation feature of copper oxide nanofluid in a higher-than-room-temperature environment and to analyze its size change and the motion behavior of suspended nanoparticles. This study employs an ambient temperature controller to maintain the environment temperature within the scope of normal fluid work temperature to obtain data on the change in suspended particles of copper oxide nanofluid under varying temperatures and through change of time. Experimental result shows that the particle size distribution of copper oxide nanofluid changes when the temperature rises due to the slight absorption and aggregation phenomena between particles, and that the change in environmental temperature can accelerate the aggregation of copper oxide nanofluid, which can affect its stability in application. However, the change in particle size distribution will gradually stabilize for a longer duration of constant temperature.

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