Dimensional changes of metallic glasses during bombardment with fast heavy ions

Hou, Ming; Klaumünzer, S.; Schumacher, G.

doi:10.1103/physrevb.41.1144

Cited by 170 publications

(70 citation statements)

References 31 publications

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“…A stress-driven deformation of the SiO 2 matrix due to SHII-induced in-plane strain perpendicular to the ion beam direction has also been suggested as a potential elongation mechanism [107]. The latter leads to the well known "ion hammering" effect [108,109] causing the anisotropic expansion of both bulk SiO 2 [95,110] and colloidal SiO 2 [111,112] perpendicular to the incident beam. The lack of NP elongation in the absence of a sufficiently thick surrounding matrix, as shown by Penninkhof et al [113], supports this theory.…”

Section: Introductionmentioning

confidence: 99%

Ion Beam Formation and Modification of Cobalt Nanoparticles

Sprouster

Ridgway

2012

Applied Sciences

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This article reviews the size-dependent structural properties of ion beam synthesized Co nanoparticles (NPs) and the influence of ion irradiation on the size, shape, phase and structure. The evolution of the aforementioned properties were determined using complementary laboratory-and advanced synchrotron-based techniques, including cross-sectional transmission electron microscopy, small-angle X-ray scattering and X-ray absorption spectroscopy. Combining such techniques reveals a rich array of transformations particular to Co NPs. This methodology highlights the effectiveness of ion implantation and ion irradiation procedures as a means of fine tuning NP properties to best suit specific technological applications. Furthermore, our results facilitate a better understanding and aid in identifying the underlying physics particular to this potentially technologically important class of nanomaterials.

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Section: Introductionmentioning

confidence: 99%

Ion Beam Formation and Modification of Cobalt Nanoparticles

Sprouster

Ridgway

2012

Applied Sciences

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“…During the thermal spike shear stresses in the heated region relax, resulting in an associated shear strain that would freeze in upon cooling of the thermal spike. Experimentally, the anisotropic deformation has been studied by observing macroscopic dimensional changes of (metallic) glass foils [1,2] or by studying the wafer curvature induced by irradiated thin ®lms constrained on a substrate [4,5,9]. Recently, we have discovered that the deformation process also occurs in free-standing colloidal particles [10].…”

Section: Introductionmentioning

confidence: 99%

Anisotropic deformation of colloidal particles under MeV ion irradiation

Dillen

Snoeks

Fukarek

et al. 2001

Nuclear Instruments and Methods in Physics Research Section B:

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Spherical silica colloids with a diameter of 1:0 lm, made by wet chemical synthesis, were irradiated with 2±16 MeV Au ions at¯uences ranging from 2 Â 10 14 to 11 Â 10 14 cm À2 . The irradiation induces an anisotropic plastic deformation turning the spherical colloids into ellipsoidal oblates. After 16 MeV Au irradiation to a¯uence of 11 Â 10 14 cm À2 a sizeaspect ratio of 4.7 is achieved. The size polydispersity ($3%) remains unaected by the irradiation. The transverse diameter increases with the electronic energy loss above a threshold value of $0.6 keV/nm. Non-ellipsoidal colloids are observed in the case that the projected ion range is smaller than the colloid diameter. The deformation eect is also observed for micro-crystalline ZnS and amorphous TiO 2 colloids, as well as ZnS=SiO 2 core/shell particles. No deformation is observed for crystalline Al 2 O 3 and Ag particles. The data provide strong support for the thermal spike model of anisotropic deformation. Ó

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“…[1][2][3][4][5][6][7] The anisotropy is related to the direction of the ion beam: materials expand perpendicular to the ion beam and contract parallel to the ion beam while maintaining their volume. The anisotropic deformation is most pronounced at low temperatures ͑Ͻ100 K͒ and decreases with increasing irradiation temperature.…”

Section: Introductionmentioning

confidence: 99%

“…3,4 Recently, MeV ion irradiation of micron-sized colloidal silica particles was used to change the colloids' shape from spherical to oblate ellipsoidal. [6][7][8] The ion irradiationinduced anisotropic deformation technique is now a wellestablished tool to tailor the shape of nanoscale and microscale structures.…”

Section: Introductionmentioning

confidence: 99%