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Title: Ion beam-induced bending of TiO2 nanowires with bead-like and prismatic shapes

Journal Article · · RSC Advances
DOI:https://doi.org/10.1039/d1ra09122k· OSTI ID:1862815
 [1];  [2];  [1]; ORCiD logo [1]
  1. Univ. of Manitoba, Winnipeg, MB (Canada). Manitoba Inst. of Materials
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)

Ion beam irradiation is a promising method to manipulate the composition and shape of nanowires. It causes the formation of crystal defects like vacancies and dislocations, and consequently, a volume expansion within the irradiated region, giving rise to the nanowire bending. The bending effect has been extensively discussed within nanowires with different diameters under ion beams with varying energies and ion fluences. However, the behaviors of nanowires with complicated shapes, which may have non-uniform irradiated regions due to the changing angle of incidence and shadowing effect, have remained largely unknown. Herein, the structural changes and bending of TiO2 nanowires with both bead-like and prismatic shapes are investigated under a Ga+ ion beam. The multi-faceted morphology, and consequently, varying angles of incidence, result in inhomogeneous irradiation and volume expansion. As a result, significant bending is only observed in prismatic nanowires. Since irradiation is confined within the half of nanowires facing the ion beam, the bending of nanowires is reversible by changing the direction of the ion beam. In order to provide insights into the tailoring composition and morphology of nanowires, we anticipate that this finding can establish the beam analog at the nanoscale, the bending of which can be tuned by ion irradiation.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1862815
Report Number(s):
LA-UR-21-31747
Journal Information:
RSC Advances, Vol. 12, Issue 9; ISSN 2046-2069
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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