Fig. 1
From: In vitro evaluation of osteoblast responses to carbon nanotube-coated titanium surfaces
SEM images of titanium discs. i SEM images of (a) uncoated Ti, (b) MWCNT-coated Ti, and (c) MWCNT-COOH-coated Ti at ×60 magnification. The CNT coatings are uniform throughout the discs. ii SEM images of (a) uncoated Ti, (b) MWCNT-coated Ti, and (c) MWCNT-COOH-coated Ti at ×10,000 magnification. Images show a rougher uncoated Ti surface [R a = 0.16 ± 0.004 μm (mean ± SD)] and CNTs embedded in the collagen matrix. The R a for MWCNT and MWCNT-COOH-coated groups (mean ± SD) was 0.83 ± 0.02 and 0.84 ± 0.01 μm, respectively. iii SEM image of cross-section of (a) MWCNT coating at ×80,000 magnification and (b) MWCNT-COOH at ×120,000 magnification on glass coverslip. CNTs can be seen projecting out from the collagen matrix. The CNTs were 20–30 nm in diameter and 100 μm in length