Atom-Probe Tomography of Meteoritic Nanodiamonds.

Atom-Probe Tomography of Meteoritic Nanodiamonds

1 Robert A. Pritzker Center for Meteoritics and Polar Studies, The Field Museum of Natural History, Chicago, IL, USA. E-mail: [email protected] 2 Chicago Center for Cosmochemistry, The University of Chicago, Chicago, IL, USA. 3 Northwestern University Center for Atom-Probe Tomography, Department of Materials Science & Engineering, Northwestern University, Evanston, IL, USA. 4 Materials Sci...

Atom-probe analyses of nanodiamonds from Allende

Atom-probe tomography (APT) is currently the only analytical technique that, due to its spatial resolution and detection efficiency, has the potential to measure the carbon isotope ratios of individual nanodiamonds. We describe three different sample preparation protocols that we developed for the APT analysis of meteoritic nanodiamonds at sub-nm resolution and present carbon isotope peak ratio...

C / C ratio 12 13 − determination in nanodiamonds by atom - probe tomography

The astrophysical origins of ∼3 nm-diameter meteoritic nanodiamonds can be inferred from the ratio of C/ C 12 13 . It is essential to achieve high spatial and mass resolving power and minimize all sources of signal loss in order to obtain statistically significant measurements. We conducted atom-probe tomography on meteoritic nanodiamonds embedded between layers of Pt. We describe sample prepar...

Atom probe tomography in nanoelectronics

The role of laser assisted atom probe tomography (APT) in microelectronics is discussed on the basis of various illustrations related to SiGe epitaxial layers, bipolar transistors or MOS nano-devices including gate all around (GAA) devices that were carried out at the Groupe de Physique des Matériaux of Rouen (France). 3D maps as provided by APT reveal the atomic-scale distribution of dopants a...

Toward atom probe tomography of microelectronic devices