Structure of Quasicrystals

Abstract

Quasicrystals represent aperiodically ordered form of solids with symmetries long thought forbidden in nature. Since their discovery, the fundamental key question has been “Where are the atoms?” For the last decade major strides have been made in determining atomic structure of quasicrystals, largely by direct imaging using scanning transmission electron microscopy (STEM). In this chapter, we describe effective use of annular dark-field STEM imaging for structural analysis of quasicrystals.