File:Cobalt hydroxide nanotubes2.jpg
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| Description | Co(OH)2 nanotubes: At 110 °C, only helices and dots (c) can be prepared. After totally cooling down the autoclave and then increasing the temperature to 140 °C, nanotubes with holes in the wall can be produced (a). The ring-like structures totally disappears, suggesting that they might be intermediates. The red circle of a shows some small dots embedded on the wall of the tubes, suggesting that the small dots cannot reconstruct to form walls and thus small dots are not intermediates. The rapid cooling of the autoclave by flushing cold water can furthest maintain the original features of the on-going reaction system and hint at the intermediates (b). Comparing the TEM image with corresponding sample prepared by naturally cooling down in air, the dots in area I are expected to be the aggregate of ultrathin intermediates. We may expect that the well-packing of strands in area II could lead to the ring-like structure in c, so that such coiling strands might be the intermediates. The interlaced tubes in area III shed light on the termination mechanism of tube growth. (d) The possibilities of preparing nanotubes with more layers. Scale bar: (a,b,d) 100 nm; (c) 200 nm, inset, 100 nm. |
| Date | |
| Source | http://www.nature.com/ncomms/2015/151029/ncomms9756/full/ncomms9756.html |
| Author | Bing Ni et al. |
| Permission (Reusing this file) |
  This file is licensed under the Creative Commons Attribution 4.0 International license.
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| current | 05:42, 4 December 2015 | | 946 × 885 (296 KB) | Materialscientist (talk | contribs) | {{Information |Description=Co(OH)<sub>2</sub> nanotubes: At 110 °C, only helices and dots (c) can be prepared. After totally cooling down the autoclave and then increasing the temperature to 140 °C, nanotubes with holes in the wall can be produce... |
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