Anisotropic deformation of colloidal particles under MeV ion irradiation

Dillen, T. van; Snoeks, E.; Fukarek, W.; Kats, Carlos M. van; Velikov, Krassimir P.; Blaaderen, Alfons van; Polman, A.

doi:10.1016/s0168-583x(00)00611-x

Cited by 49 publications

(30 citation statements)

References 20 publications

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“…They are complementary to the results of the particle shaping effect observed in the high ion energy range, in which the pattern transformation occurs by the spherical particle deformation into ellipsoidal or hexagonal ones without 2D lattice symmetry breaking, as reported by Zolnai et al at E = 500 keV [4], T. van Dillen et al [1,5,6] and Snoeks et al at 4 MeV [7,8], J. C. Cheang-Wong et al at 8 MeV [9], and by Skupinski et al at 25 MeV [10] ion energy, respectively.…”

supporting

confidence: 80%

Self‐organization of silica nano‐particles induced by the ion beam

Lugomer

Zolnai

Tóth

et al. 2011

Phys. Status Solidi C

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We studied the self‐organization (SO) of small‐size (D = 90 nm), medium‐size (220 nm), and large‐size (450 nm) colloidal silica nanoparticles in Langmuir‐Blodgett layers induced by a focused Ga+ ion beam with energy of 30 keV. The ion irradiation induces SO into various types of clusters as the result of particle charging and heating, Coulomb repulsion and motion on the substrate surface, as well as of particle ‐ particle and particle ‐ substrate interaction. These processes show a great difference of the underlying dynamics and of the characteristics of SO pattern, depending on the particle size and on the ion fluence. The two dimensional (2D) pattern of the small‐size particles is transformed into “infinite” chain‐cluster, while the pattern of medium‐size particles is transformed into a number of short separated chain‐clusters. The pattern of large‐size particles is mostly unchanged, but shows particle melting and buckling, which at higher fluences passes into ion beam‐induced sputtering (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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supporting

confidence: 80%

Self‐organization of silica nano‐particles induced by the ion beam

Lugomer

Zolnai

Tóth

et al. 2011

Phys. Status Solidi C

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“…[1][2][3] One of the most striking examples of this effect is the deformation of single colloidal particles under megaelectron-volt ion irradiation. 4,5 Spherical silica colloids expand perpendicular to the ion beam and contract parallel to the ion beam changing their shape to oblate ellipsoidal. This ion beam deformation technique provides a unique method to tailor the shape of colloidal particles and aggregates.…”

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confidence: 99%

Ion beam-induced anisotropic plastic deformation at 300 keV

Dillen

Polman

Kats

et al. 2003

Applied Physics Letters

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Contrary to earlier predictions, ion irradiation at energies as low as 300 keV causes dramatic anisotropic plastic deformation of silica glass. Spherical colloidal silica particles with diameters of 125, 305, and 1030 nm were irradiated with Xe ions at energies in the range 0.3–4.0 MeV at temperatures between 85 and 380 K. Irradiation-induced anisotropic plastic deformation changes the colloid shape from spherical into oblate ellipsoidal at a rate that strongly increases with ion energy. At a fixed fluence, the transverse diameter increases with electronic energy loss. Even at an energy as low as 300 keV large particle anisotropy was found (size aspect ratio of 1.43 at 1×1015 cm−2). The transverse plastic strain gradually decreases with increasing irradiation temperature: it decreases by a factor 4.5 between 85 and 380 K. The data are in agreement with a viscoelastic thermal spike model for anisotropic deformation.

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“…Thus the resulting strained track represents the mesoscopic defect responsible for the anisotropic deformation. Van Dillen et al have demonstrated that free standing silica particles expand perpendicular and contract parallel to the ion beam changing their shape from spherical to oblate ellipsoidal [39,40]. Several authors have shown that in case when thin metallic glass or amorphous film placed on the top of a crystalline substrate is irradiated with energetic ions under some angle, shear cannot be prevented by the substrate because of the traction-free surface so that the entire amorphous layer is sheared [41][42][43].…”

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confidence: 99%

Modification of semiconductor or metal nanoparticle lattices in amorphous alumina by MeV heavy ions

et al. 2016

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In the present work we investigate effects of MeV heavy ions (from 0.4 MeV Xe to 15 MeV Si) on regularly ordered nanoparticle (NP) lattices embedded in amorphous alumina matrix. These nanostructures were produced by self-assembling growth using magnetron-sputtering deposition. From grazing incidence small-angle x-ray scattering measurements we have found that the used MeV heavy ions do not change the NP sizes, shapes or distances among them. However, ions cause a tilt of the entire NP lattice in the direction parallel to the surface. The tilt angle depends on the incident ion energy, type and the applied fluence and a nearly linear increase of the tilt angle with the ion fluence and irradiation angle was found. This way, MeV heavy ion irradiation can be used to design custom-made NP lattices. In addition, grazing incidence small-angle x-ray scattering can be effectively used as a method for the determination of material redistribution/shift caused by the ion hammering effect. For the first time, the deformation yield in amorphous alumina was determined for irradiation performed at the room temperature.

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Anisotropic deformation of colloidal particles under MeV ion irradiation

Cited by 49 publications

References 20 publications

Self‐organization of silica nano‐particles induced by the ion beam

Self‐organization of silica nano‐particles induced by the ion beam

Ion beam-induced anisotropic plastic deformation at 300 keV

Modification of semiconductor or metal nanoparticle lattices in amorphous alumina by MeV heavy ions

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