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The effect of Pd addition to Fe as catalysts on growth of carbon nanotubes by TCVD method

Mortazavi, S. Z ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apsusc.2008.04.019
  3. Publisher: Elsevier , 2008
  4. Abstract:
  5. The effects of Pd addition to Fe (Pd/Fe = 0, 2.5/7.5, 5/5, 7.5/2.5 and 1) and growth temperatures (920 and 970 °C) on density, diameter and growth mode of carbon nanotubes (CNTs) have been studied. SEM observations and TG analyses confirmed that the CNT yields depend on Pd/Fe ratios as (7.5/2.5) > (5/5) > Pd > (2.5/7.5) > Fe at both growth temperatures. TEM data showed that addition of Pd results in tip growth mode. From Raman spectroscopy data, the order of samples' structural quality (I G /I D ratio) are Fe > Pd/Fe (2.5/7.5) > (5/5) > (7.5/2.5) > Pd and the I G /I D ratios increase by decreasing the growth temperature. Films with higher concentration of Fe (Pd/Fe = 0, 2.5/7.5) contain some single-walled carbon nanotubes. © 2008 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Carbon films ; Carbon nanotubes ; Chemical vapor deposition ; Growth temperature ; Nanocatalysts ; Yarn ; Concentration of Fe ; Growth modes ; SEM observation ; Structural qualities ; Thermal chemical vapor deposition ; Tip growth ; Single-walled carbon nanotubes (SWCN)
  8. Source: Applied Surface Science ; Volume 254, Issue 20 , 15 August , 2008 , Pages 6416-6421 ; 01694332 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S016943320800696X#!