NbTe3, VTe3, and TiTe3 Stabilized in Nanotubes

  • Author: ChemistryViews.org
  • Published: 03 December 2020
  • Copyright: Wiley-VCH GmbH
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: NbTe<sub>3</sub>, VTe<sub>3</sub>, and TiTe<sub>3</sub> Stabilized in Nanotubes

Transition-metal trichalcogenides (TMTs) of the type MX3 usually form chain-like structures, with the chains weakly bound together by van der Waals interactions. These materials have been well-studied in the bulk, and there are also some examples of TMTs isolated in few- or single-chain forms.


Alex Zettl, University of California, Berkeley, and Lawrence Berkeley National Laboratory, CA, USA, and colleagues have synthesized three previously unknown MX3-type compounds—NbTe3, VTe3, and TiTe3—using nanoconfined growth within multiwalled carbon nanotubes (MWCNTs). The team sealed the respective transition-metal powder (Nb, V, or Ti) together with tellurium and commercially available end-opened MWCNTs under vacuum in a quartz ampule. The reaction mixture was then heated to 520–625 °C for several days.


The products were characterized using transmission electron microscopy (TEM) and atomic-resolution scanning transmission electron microscopy (STEM). The team found that the desired MTe3 compounds can be isolated in forms from many chains, to few chains (between two and four), and down to single-chain samples, depending on the cavity diameter of the MWCNTs. The nanotubes protect and stabilize the chain-like structures of the MTe3 products, and thus, make their synthesis possible.


 

 

Article Views: 1443

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH