TITLE

Particle sizing of magnetite-based magnetic fluid using atomic force microscopy: A comparative study with electron microscopy and birefringence

AUTHOR(S)
Lacava, B. M.; Lacava, B.M.; Azevedo, R. B.; Azevedo, R.B.; Silva, L. P.; Silva, L.P.; Lacava, Z. G. M.; Lacava, Z.G.M.; Neto, K. Skeff; Neto, K. Sheff; Buske, N.; Bakuzis, A. F.; Bakuzis, A.F.; Morais, P. C.; Morais, P.C.
PUB. DATE
September 2000
SOURCE
Applied Physics Letters;9/18/2000, Vol. 77 Issue 12
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Atomic force microscopy (AFM), transmission electron microscopy (TEM), and static magnetic birefringence (SMB) were used to unfold the particle size polydispersity profile of a magnetite-based magnetic fluid sample. The data obtained from different techniques were curve fitted using the lognormal distribution function, from which the mean particle diameter (D[sub m]) and the standard deviation (σ) were obtained. In comparison to the TEM data, the AFM data show a reduction of D[sub m] (about 20%) and an increase of σ (about 15%). In contrast, close agreement between the TEM and SMB data was found. © 2000 American Institute of Physics.
ACCESSION #
4414269

 

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