Optical contactless measurement of electric fieldinduced tensile stress in diamond nanoscale needlesстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 20 апреля 2022 г.
Аннотация:The application of a high electrostatic field at the apex of monocrystalline
diamond nanoscale needles induces an energy splitting of the photoluminescence lines of
color centers. In particular, the splitting of the zero-phonon line of the neutral nitrogenvacancy
complex (NV0) has been studied within a laser-assisted tomographic atom probe
equipped with an in-situ micro-photoluminescence bench. The measured quadratic
dependence of the energy splitting on the applied voltage corresponds to the stress generated
on the metal-like apex surface by the electrostatic field. Tensile stress up to 7 GPa has thus
been measured in the proximity of the needle apex. Furthermore, the stress scales along the
needle shank inversely proportionally to its axial cross section. We demonstrate thus a method
for contactless piezo-spectroscopy of nanoscale systems by electrostatic field regulation for
the study of their mechanical properties. These results also provide an experimental
confirmation to the models of dielectrics surface metallization under high electrostatic field.