Structure and Properties of Nanoparticles Formed by Ion Implantation

Meldrum, A.; López, René; Magruder, R.H.; Boatner, L. A.; White, C. W.

doi:10.1007/978-3-540-88789-8_9

Cited by 20 publications

(14 citation statements)

References 87 publications

(113 reference statements)

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“…The local heating leads to the motion of the particles, i.e., Brownian motion occur as a result of the ther-modynamic process (Schachoff et al, 2015). The electronic energy loss induces the nucleation by radiolysis process and these nucle-ated particles grow and precipitates in the superficial implanted layer (Meldrum, Lopez, Magruder, Boatner, & White, 2010). Formation of micro structures might be due to the void nucleation mechanism.…”

Section: Results and Discussion 31 Scanning Electron Microscopymentioning

confidence: 99%

Surface stiffening and enhanced photoluminescence of ion implanted cellulose – polyvinyl alcohol – silica composite

Shanthini

Sakthivel

Menon

et al. 2016

Carbohydrate Polymers

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Novel Cellulose (Cel) reinforced polyvinyl alcohol (PVA)-Silica (Si) composite which has good stability and in vitro degradation was prepared by lyophilization technique and implanted using N 3+ ions of energy 24 keV in the fluences of 1 × 10 15 , 5 × 10 15 and 1 × 10 16 ions/cm 2 . SEM analysis revealed the formation of microstructures, and improved the surface roughness on ion implantation. In addition to these structural changes, the implantation significantly modified the luminescent, thermal and mechanical properties of the samples. The elastic modulus of the implanted samples has increased by about 50 times compared to the pristine which confirms that the stiffness of the sample surface has increased remarkably on ion implantation. The photoluminescence of the native cellulose has improved greatly due to defect site, dangling bonds and hydrogen passivation. Electric conductivity of the ion implanted samples was improved by about 25%. Hence, low energy ion implantation tunes the mechanical property, surface roughness and further induces the formation of nano structures. MG63 cells seeded onto the scaffolds reveals that with the increase in implantation fluence, the cell attachment, viability and proliferation have improved greatly compared to pristine. The enhancement of cell growth of about 59% was observed in the implanted samples compared to pristine. These properties will enable the scaffolds to be ideal for bone tissue engineering and imaging applications.

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Section: Results and Discussion 31 Scanning Electron Microscopymentioning

confidence: 99%

Surface stiffening and enhanced photoluminescence of ion implanted cellulose – polyvinyl alcohol – silica composite

Shanthini

Sakthivel

Menon

et al. 2016

Carbohydrate Polymers

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“…1͒, usually described by classical thermodynamic concepts discussed elsewhere. [7][8][9][10] Upon aging, two sets of structures are formed. The first set consists of TEM observable particles ͓Fig.…”

Section: Figmentioning

confidence: 99%

“…Their growth follows a nonhomogeneous coarsening process which produces both size and depth dispersed NP systems. [7][8][9][10] We have previously demonstrated that the classical nucleation route observed for most metal atoms implanted into silica films can be avoided in the case of Sn. 11 It was argued that, during a low temperature long-term thermal treatment ͑aging͒, there is formation of small atomic clusters with high thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Aging effects on the nucleation of Pb nanoparticles in silica

Luce

Kremer

Reboh

et al. 2011

Journal of Applied Physics

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The ion beam synthesis of Pb nanoparticles (NPs) in silica is studied in terms of a two step thermal annealing process consisting of a low temperature long time aging treatment followed by a high temperature short time one. The samples are investigated by Rutherford backscattering spectrometry and transmission electron microscopy. The results obtained show that highly stable Pb trapping structures are formed during the aging treatment. These structures only dissociate at high temperatures, inhibiting the nucleation of NPs in the metallic phase and causing an atomic redistribution that renders the exclusive formation of a two dimensional, uniform and dense array of Pb NPs at the silica–silicon interface. The results are discussed on the basis of classic thermodynamic concepts.

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“…The metallic as well as semiconductor NCs exhibit enhanced optical properties [23]. These optical properties are due to the quantum effects as well as electronic properties influenced by the implanted ion species.…”

Section: Introductionmentioning

confidence: 99%

“…Larger NCs are primarily responsible for light absorption and scattering, whereas the smaller NCs are responsible for the nonlinear optical properties. The modified Mie expression [23] in Eq. 1 shows the absorption of light due to the size and ion species of NCs:…”

Section: Introductionmentioning

confidence: 99%

Investigation of structural and optical properties of Ag nanoclusters formed in Si(100) after multiple implantations of low energies Ag ions and post-thermal annealing at a temperature below the Ag-Si eutectic point

Dhoubhadel

Rout

Lakshantha

et al. 2014

AIP Conference Proceedings

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Articles you may be interested inResistive switching characteristics in dielectric/ferroelectric composite devices improved by post-thermal annealing at relatively low temperature Appl. Phys. Lett. 104, 092903 (2014) were sequentially implanted into Si(100) to create a distribution of different sizes and densities of buried metal nanoclusters (NC) at the near-surface layers. These structures have applications in fields involving plasmonics, optical emitters, photovoltaic, and nano-electronics. The dimension, location and concentration of these NCs influence the type of the applications. The implantation profiles were simulated by utilizing the widely used Stopping and Range of Ions in Matter (SRIM) code as well as a dynamic-TRIM code, which accounts for surface sputtering. The implanted samples were subsequently annealed either in a gas mixture of 4% H 2 + 96% Ar or in vacuum at a temperature ~500 ºC up to 90 minutes. The annealing was carried out below the eutectic temperature (~ 841 ºC) of Ag-Si to preferentially synthesize Ag NCs in Si rather than silicide. In order to study the size, concentration and distribution of the Ag NCs in Si, the samples were characterized by Rutherford Backscattering Spectrometry (RBS), X-ray photoelectron spectroscopy (XPS) in combination with Ar-ion etching, and Transmission Electron Microscopy (TEM) techniques. The annealed samples showed a preferential distribution of the Ag NCs' sizes up to 10 nm either near the surface region (< 25nm) or at deeper layers (60-80 nm) closer to the interface of the implanted layer with the crystalline Si substrate. Ag NCs of larger diameters (up to 15 nm) were seen in the annealed sample near the peak concentration positions (~35-55 nm) of the implanted Ag ions. We have investigated the optical absorption properties due to these nano-structures in Si. The multiple energy implanted samples annealed in a gas mixture of 4% H 2 + 96% Ar show enhancements in the optical absorption in the visible range.

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Structure and Properties of Nanoparticles Formed by Ion Implantation

Cited by 20 publications

References 87 publications

Surface stiffening and enhanced photoluminescence of ion implanted cellulose – polyvinyl alcohol – silica composite

Surface stiffening and enhanced photoluminescence of ion implanted cellulose – polyvinyl alcohol – silica composite

Aging effects on the nucleation of Pb nanoparticles in silica

Investigation of structural and optical properties of Ag nanoclusters formed in Si(100) after multiple implantations of low energies Ag ions and post-thermal annealing at a temperature below the Ag-Si eutectic point

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