Journal of Physical Chemistry C
Journal of Physical Chemistry C
5 years ago

Passivation Effect of Gold Nanoparticles on Uniform Beam-Induced Structural Changes of Amorphous SiOx Nanowire

Passivation Effect of Gold Nanoparticles on Uniform Beam-Induced Structural Changes of Amorphous SiOx Nanowire
Xianfang Zhu, Jiangbin Su
Passivation effect of heterogeneous Au nanoparticles (AuNPs) on the structural changes at the nanoscale (or so-called nanoinstability) of amorphous SiOx nanowire (a-SiOx NW) as athermally induced by uniform electron beam (e-beam) irradiation is investigated in an in situ transmission electron microscope. It is found that at room temperature the straight and uniform a-SiOx NW demonstrates a considerable uniform plastic elongation and an accelerated uniform radial shrinkage at the nanoscale. However, once being modified with AuNPs, the nanocurved sidewall surface of a-SiOx NW becomes intriguingly passivated. As a consequence, both the elongation and the radial shrinkage of the AuNPs-modified a-SiOx NW are greatly retarded. A new mechanism of athermal diffusion and plastic flow combined with athermal evaporation as driven by the nanocurvature of a-SiOx NW and the beam-induced soft mode and instability of atomic vibration, which are different from the existing knock-on mechanism, is proposed to elucidate the observed new phenomena.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b03160

DOI: 10.1021/acs.jpcc.7b03160

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.