Data/hora: 24/09/2024 15:02:42

Biblioteca(s): 	Embrapa Instrumentação.	
Data corrente: 	28/04/2003	
Data da última atualização: 	28/04/2003	
Autoria: 	VAZ, C. M. P.; HERRMANN, P. S. P.; CRESTANA, S.	
Afiliação: 	Embrapa Instrumentação Agropecuária, São Carlos, SP.	
Título: 	Thickness and size distribution of clay-sized soil particles measured through atomic force microscopy.	
Ano de publicação: 	2002	
Fonte/Imprenta: 	Powder Technology, Lausanne, v. 126, p. 51-58, 2002.	
Idioma: 	Inglês	
Conteúdo: 	Soil particle size distribution is a very important soil characterisitc because it is related with many physical, chemical and biological  processes occurring in soils. However, at the sub-micron range, where many important sorption and transformations processes occur, there are scanning electron microscopy (SEM_. The classical TEM and SEM, however, are sometimes unable to clearly differente between agglomerantes, particles and grains, and sample preparation is very difficult and tedious. To overcome these limitations, we have aplied the atomic force microscopy (AFM) technique to analyse the particle size distribution of an oxisol from São Carlos site, in Brazil, at the sub-micron range. Thicness and diameter of soil particles deposited in freshly, cleaved mica were measured for each individual particle, allowing to determine their particle size distribution. Assuming cylindrical shaped particles and a constant aprticle density of 2.7 gcm-3, the mass=based soil particle distribution at the sub-micron range is obtained.	
Palavras-Chave: 	AFM; Microscopia de força atômica; Particle tichness.	
Thesagro: 	Solo.	
Thesaurus Nal: 	atomic force microscopy; kaolinite; particle size; soil.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Instrumentação (CNPDIA)	
Exemplares: 	CNPDIA - (7473-1) - UPC - SP - -- - PROCI-02.00029 -  - 02.0000029 - DIS