Direct formation of nanostructures by focused electron beam on a surface of thin metallic films

Sniķeris, Jānis; Gerbreders, V.

doi:10.1117/12.2275961

Cited by 2 publications

(2 citation statements)

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“…The first would be the height increase of the nanostructure when the EB diameter was reduced from 15 to 10 nm, while maintaining the same beam current. This observation supports the theory described in our previous work [ 30 ] regarding the movement of positive metal ions within the electric field formed around a negatively charged EB, promoting nanostructure formation on metal surfaces. A smaller beam diameter would imply a higher current density and a stronger local electric field, resulting in a larger attractive force on the metal ions.…”

Section: Discussionsupporting

confidence: 93%

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Effects of focused electron beam irradiation parameters on direct nanostructure formation on Ag surfaces

Sniķeris¹,

Gerbreders²,

Bulanovs³

et al. 2022

Beilstein J. Nanotechnol.

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Metallic nanostructures are applied in many fields, including photonics and plasmonics, due to their ability to absorb or emit light at frequencies which depend on their size and shape. It was recently shown that irradiation by a focused electron beam can promote the growth of nanostructures on metal surfaces and the height of these structures depends on the duration of the irradiation and the material of the surface. However, the effects on growth dynamics of numerous irradiation parameters, such as beam current or angle of incidence, have not yet been studied in detail. We explore the effects of focusing, angle of incidence, and current of the electron beam on the size and shape of the resulting structures on an Ag surface. In addition, we investigate how the nitrogen plasma cleaning procedure of a vacuum chamber can affect the growth of these structures. A beam current of around 40 pA resulted in the fastest structure growth rate. By increasing the beam diameter and angle of incidence the growth rate decreased; however, by raising the beam focus up to 5–6 μm above the surface the growth rate increased. Vacuum chamber cleaning reduced structure growth rate for a few hours. These findings can help to better control and optimise the growth of nanostructures on metal surfaces undergoing irradiation by a focused electron beam.

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Section: Discussionsupporting

confidence: 93%

“…In one of our previous studies [ 30 ] we investigated the growth dynamics of nanodots on various metal surfaces (Al, Ag, Cu, Cr, and Mo) under focused EB irradiation in an SEM vacuum chamber. Similar to the previously discussed study, an influence of the surface material on the growth rate of the nanodots was observed.…”

Section: Introductionmentioning

confidence: 99%