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. 2011 Feb 18;39(4):1335–1348. doi: 10.1007/s10439-011-0270-0

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© The Author(s) 2011

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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Pictorial representation of Gd³⁺ ions ( ) within the sidewall defects of a nanotube. Gd clusters measure roughly 1 × 5 nm with 3–10 Gd³⁺ ions per cluster. Graphic from Fig. 1 in Hartman et al. 37

Inline graphic — Pictorial representation of Gd³⁺ ions ( ) within the sidewall defects of a nanotube. Gd clusters measure roughly 1 × 5 nm with 3–10 Gd³⁺ ions per cluster. Graphic from Fig. 1 in Hartman et al. 37