High-resolution imaging of biotite using focal series exit wavefunction restoration and the graphene mechanical exfoliation method

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Tarih

2015

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Mineralogical Society

Erişim Hakkı

info:eu-repo/semantics/openAccess

Özet

We have applied mechanical exfoliation for the preparation of ultra-thin samples of the phyllosilicate mineral biotite. We demonstrate that the 'scotch tape' approach, which was made famous as an early method for production of single-atom-thick graphene, can be used for production of sheet-silicate specimens that are sufficiently thin to allow high-resolution transmission electron microscope (HRTEM) imaging to be achieved successfully while also being free from the specimen preparation artefacts that are often caused by ion-beam milling techniques. Exfoliation of the biotite parallel to the (001) planes has produced layers as thin as two structural TOT units thick (~2 nm). The minimal specimen thickness enabled not only HRTEM imaging but also the application of subsequent exit wavefunction restoration to reveal the pristine biotite lattice. Exit wavefunction restoration recovers the full complex electron wave from a focal series of HRTEM images, removing the effects of coherent lens aberrations. This combination of methods therefore produces images in which the observed features are readily interpreted to obtain atomic resolution structural information. © 2015 Mineralogical Society 2015.

Açıklama

Anahtar Kelimeler

Biotite, Exfoliation, Focal series, Graphene, High-resolution transmission electron microscopy

Kaynak

Mineralogical Magazine

WoS Q Değeri

Scopus Q Değeri

N/A

Cilt

79

Sayı

2

Künye