Navegação Ciências Exatas e da Terra por Assunto "Microscopia eletrônica de varredura"
Resultados 1-7 de 7
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Aplicações de microcospia eletrônica de varredura (MEV) e sistema de energia dispersiva (EDS) no estudo de gemas exemplos brasileiros
(2003) [Artigo de periódico]This paper presents results of SEM and EDS study in some Brazilian gemstones. Emerald from Campos Verdes (GO) contains several mineral inclusions as talc, dolomite, chromite, pyrite, magnetite, etc. Sylvite crystals was ... -
Diagnose de microbiólitos metálicos em espécies vegetais endêmicas em solos de rochas ultramáficas por microscopia eletrônica de varredura
(2004) [Artigo de periódico]The aim of this paper is to investigate by SEM the presence of crystalline forms of noble metals in dehydrated tissues of Scutia buxifolia (Rhamnaceae), Scoparia montevidensis (Scrophulariaceae) and Adiantopsis cf. ... -
Direct etching of SiO2 and Al2O3 by 900-keV gold ions
(2009) [Artigo de periódico]We report the direct etching of Al2O3 and SiO2 using 900-keV Au+ ions. 2000-mesh Cu grids were employed as masks using two different configurations: 1 the Cu mesh was placed on top of each insulator separately and independent ... -
Geometrical distribution of Cryptococcus neoformans mediates flower-like biofilm development
(2017) [Artigo de periódico]Microbial biofilms are highly structured and dynamic communities in which phenotypic diversification allows microorganisms to adapt to different environments under distinct conditions. The environmentally ubiquitous pathogen ... -
Ion irradiation-induced foams in antimonide binary alloys : a combination of small energy bandgap with giant surface-to-bulk ratio
(2020) [Artigo de periódico]This is a short review about the ion irradiation-induced foams in antimonide films. III–V semiconductors like InSb and GaSb can be transformed into solid foams with nanometric dimensions upon irradiation with swift heavy ... -
Scanning electron microscopy and machine learning reveal heterogeneity in capsular morphotypes of the human pathogen Cryptococcus spp.
(2020) [Artigo de periódico]Phenotypic heterogeneity is an important trait for the development and survival of many microorganisms including the yeast Cryptococcus spp., a deadly pathogen spread worldwide. Here, we have applied scanning electron ... -
A study of the structural, magnetic, and electrical properties of Ba1-xNaxCoO3 compounds (x = 0.25, 0.5, 0.75)
(2021) [Artigo de periódico]Cobaltite-like materials having metal-insulator transitions are relevant in the consumer electronics market. In this work, we present the structural, magnetic, and electrical properties of Ba1-xNaxCoO3(with x= 0.25, 0.5, ...