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Titolo:
Application of atomic force microscopy to particle sizing
Autore:
Kollensperger, G; Friedbacher, G; Krammer, A; Grasserbauer, M;
Indirizzi:
Vienna Univ Technol, Inst Analyt Chem, A-1060 Vienna, Austria Vienna Univ Technol Vienna Austria A-1060 t Chem, A-1060 Vienna, Austria Vienna Univ Technol, Inst Chem Engn Fuel Technol & Environm Technol, A-1060 Vienna Univ Technol Vienna Austria A-1060 nol & Environm Technol, A-1060
Titolo Testata:
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
fascicolo: 4, volume: 363, anno: 1999,
pagine: 323 - 332
SICI:
0937-0633(199902)363:4<323:AOAFMT>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING TUNNELING MICROSCOPY; IDENTIFICATION; GRAPHITE; AEROSOL; GOLD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Friedbacher, G ViennaAustriaechnol, Inst Analyt Chem, Getreidemarkt 9-151,A-1060 Vienna, Vienna Univ Technol Getreidemarkt 9-151 Vienna Austria A-1060
Citazione:
G. Kollensperger et al., "Application of atomic force microscopy to particle sizing", FRESEN J AN, 363(4), 1999, pp. 323-332

Abstract

AFM has been applied for studying morphology and size distribution of nanometer-sized particles adsorbed on flat surfaces. For the quantitative evaluation of the images an algorithm for automatical particle detection and volume calculation has been developed. In this way a large number of particlescan be automatically evaluated in order to derive size distributions or surface coverages. The method has been successfully applied to determine sizedistributions of environmental aerosol particles collected with an 11-stage low pressure impactor. The first four stages with average aerodynamic equivalent diameters (aed) ranging from 21 to 170 nm were investigated. The calculated aed values were in good agreement with the predicted aed for each stage. Additionally, it could be shown that sampling conditions and storagetime affect the derived size distributions. Furthermore, AFM has been applied as reference method for conventional particle sizing techniques. For this purpose technologically relevant powders as titanium oxide powder and tungsten carbide powder were investigated using AFM and the results were compared with conventional techniques such as high resolution SEM and a light scattering method. The derived cumulative size distributions were in good agreement. The results clearly show that AFM constitutes a convenient tool for size determination, not only for ultrafine particles exploiting the high resolving power, but also in the case of larger particles.

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Documento generato il 27/09/20 alle ore 22:53:32