Morphology of sputtering damage on Cu(111) studied by scanning tunneling microscopy

Naumann, J.; Osing, J.; Quinn, Aidan J.; Shvets, I. V.

doi:10.1016/s0039-6028(97)00397-x

Cited by 32 publications

(19 citation statements)

References 27 publications

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“…1 and 2 is the extreme similarity of the entire ethene spectra for the two different defective Cu͑111͒ surfaces. In general, sputtering is not equivalent to a sort of "negative" deposit where adislands are replaced by vacancies [33][34][35] because the mobility of adatom clusters may be larger than the one of vacancy clusters. 26,[36][37][38] The similarity of the vibrational losses of ethene ͑the difference in the frequencies being smaller than Ϯ3 meV͒ allows us to conclude that as far as ethene adsorption is concerned, it does not matter how the surface roughness was induced.…”

Section: A Assignment Of the Lossesmentioning

confidence: 99%

Ethene stabilization on Cu(111) by surface roughness

Skibbe

Vogel

Binder

et al. 2009

The Journal of Chemical Physics

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The molecular vibrations of ethene adsorbed on roughened Cu(111) surfaces have been investigated with high resolution electron energy loss spectroscopy and density-functional-theory calculations. The roughness was introduced by sputtering or evaporation of copper, respectively, on the cooled surface. We found stabilization of the ethene layer compared to ethene adsorbed on pristine Cu(111). Furthermore, two new vibrational features observed on the rough surface can be assigned to frustrated translations and rotations of the ethene molecule on surface defects and are indicative of a different binding on the rough surface.

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Section: A Assignment Of the Lossesmentioning

confidence: 99%

Ethene stabilization on Cu(111) by surface roughness

Skibbe

Vogel

Binder

et al. 2009

The Journal of Chemical Physics

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“…While Zhou and Wadley did not address re-sputtering effects above 50 eV, it is clear that sputter yields increase quickly above 50 eV. In work done on Pt(111) (whose atomistics are similar to Cu(111) [12]) sputter and adatom/vacancy yields of 1 were observed at 200 eV for Xe + [13]. This suggests that the dramatic morphological change between 60 eV and 100 eV in Figure 1 is due to the onset of sputter erosion.…”

Section: Discussionmentioning

confidence: 99%

STM characterization of Cu thin films grown by direct ion deposition

et al. 2000

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In certain cases, the incidence energy of constituent atoms activates an atomistic insertion mechanism, which decreases the surface roughness of metal thin films. In an effort to probe this effect, homoepitaxial copper films were grown using a mass/energy selected direct ion deposition technique that allows precise control of the incidence energy. Surface roughness is measured using a Scanning Tunneling Microscope (STM) within the same UHV surface analysis system. The activation of the insertion mechanism near 20 eV triggers smoother crystal growth. The beneficial effects begin to be obscured by adatom/vacancy creation near 30 eV. A sophisticated Kinetic Monte Carlo/Molecular Dynamics (KMC-MD) model supports this interpretation.

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“…DIS experiments were performed at the Radiation Surface Science and Engineering Laboratory (RSSEL) in the School of Nuclear Engineering, Purdue University, in the Particle and Radiation Interaction with Soft and Hard Matter (PRIHSM) facility, originally developed and operated by Prof. Jean Paul Allain at Purdue University [27]. DIS conditions are summarized in Table 1; Energy, fluence, and incidence angle were chosen after an exhaustive revision of our previous DIS nano-structuring results on metallic materials [33,34], as well as from some other revised works on Ti, TiO 2 , Cu, Au, and Ag [35][36][37][38][39][40][41][42][43][44][45]. Argon (Ar + ) source at 1 and 0.5 keV was used to irradiate PPS samples and NPS; the selection of DIS parameters were designed to evaluate their effect on nanopatterning.…”

Section: Directed Irradiation Synthesis (Dis) Of Porous and Non-poroumentioning

confidence: 99%

Directed Irradiation Synthesis as an Advanced Plasma Technology for Surface Modification to Activate Porous and “as-received” Titanium Surfaces

Civantos

Allain

Pavón

et al. 2019

Metals

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For the design of smart titanium implants, it is essential to balance the surface properties without any detrimental effect on the bulk properties of the material. Therefore, in this study, an irradiation-driven surface modification called directed irradiation synthesis (DIS) has been developed to nanopattern porous and “as-received” c.p. Ti surfaces with the aim of improving cellular viability. Nanofeatures were developed using singly-charged argon ions at 0.5 and 1.0 keV energies, incident angles from 0° to 75° degrees, and fluences up to 5.0 × 1017 cm−2. Irradiated surfaces were evaluated by scanning electron microscopy, atomic force microscopy and contact angle, observing an increased hydrophilicity (a contact angle reduction of 73.4% and 49.3%) and a higher roughness on both surfaces except for higher incident angles, which showed the smoothest surface. In-vitro studies demonstrated the biocompatibility of directed irradiation synthesis (DIS) reaching 84% and 87% cell viability levels at 1 and 7 days respectively, and a lower percentage of damaged DNA in tail compared to the control c.p. Ti. All these results confirm the potential of the DIS technique to modify complex surfaces at the nanoscale level promoting their biological performance.

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Morphology of sputtering damage on Cu(111) studied by scanning tunneling microscopy

Cited by 32 publications

References 27 publications

Ethene stabilization on Cu(111) by surface roughness

Ethene stabilization on Cu(111) by surface roughness

STM characterization of Cu thin films grown by direct ion deposition

Directed Irradiation Synthesis as an Advanced Plasma Technology for Surface Modification to Activate Porous and “as-received” Titanium Surfaces

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