ToF-SIMS 3D Imaging of Native and Non-Native Species within HeLa Cells

Published

November 26, 2013

Author(s)

Jeremy Brison, Michael A. Robinson, Danielle S. Benoit, Shinichiro Muramoto, Patrick S. Stayton, David G. Castner

Abstract

In this study, a non-native chemical species, bromodeoxyuridine (BrdU), was imaged within single HeLa cells using time-of-flight secondary ion mass spectrometry (ToF-SIMS). The z-axis corrected 3D images were reconstructed that accurately portray the distribution of intracellular BrdU as well as other intracellular structures. The BrdU was localized to the nucleus of cells, whereas structures composed of CxHyOz- species were located in bundles on the periphery of cells. The CxHyOz- subcellular features had a spatial resolution at or slightly below a micrometer (900 nm), as defined by the distance between the 16 % and 84 % intensities in a line scan across the edge of the features. Additionally, important parameters influencing the quality of the HeLA cell 3D images were investigated. Atomic force microscopy measurements revealed that the HeLa cells were sputtered at a rate of approximately 4 nm per 10^13 C60+ ions/cm^2 at 10 keV and a 45° incidence angle. Optimal 3D images were acquired using a Bi3+ liquid metal ion gun operating in the simultaneous high mass and spatial resolution mode.

Citation

Analytical Chemistry

Volume

85

Issue

22

Pub Type

Journals

Download Paper

DOI Link

Keywords

tof-sims, 3d imaging, HeLa cells, c60

Citation

Brison, J. , Robinson, M. , Benoit, D. , Muramoto, S. , Stayton, P. and Castner, D. (2013), ToF-SIMS 3D Imaging of Native and Non-Native Species within HeLa Cells, Analytical Chemistry, [online], https://doi.org/10.1021/ac402288d (Accessed December 8, 2024)