Abstract

Herein, we demonstrate an EDI methodology, performed in a Jeol 2010F UHR microscope (spherical aberration coefficient Cs = 0.47±0.01 mm), by which the crystal structure of transition-metal oxide nanocrystals can be determined at 70 pm of resolution while unambiguously revealing the presence and location of light elements atomic columns in the relevant lattice. This approach, applied as a case study to TiO2 in the form of organic-capped nano-rods, also allows appreciating subtle alterations in the unit cell structure of the nano-crystals, relative to that inherent to the bulk material counterpart, which would not be otherwise detectable by conventional HRTEM. Such structural deviations could be at the origin of peculiar size-dependent physical-chemical properties of the concerned oxide material in the nanoscale regime. In addition, it is worthwhile to remark that this result has been achieved exposing the specimen to an electron dose as low as 106 e/nm2. The latter condition usually prevents the specimen against possible structural damages under exposure to 200 keV electrons, the induction of which remains one of the key issues in the ultimate accuracy achievable in the structural determination of materials [4].

Autore Pugliese

• Giannini Cinzia , De Caro Liberato , Carlino Elvio

Tutti gli autori

• E. Carlino; L. De Caro; C. Giannini; P. D. Cozzoli; G. Caputo

Titolo volume/Rivista

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Anno di pubblicazione

2010

ISSN

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ISBN

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Numero di citazioni Wos

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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