Nanocomposite Materials Formed by Ion Implantation

Meldrum, A.; Haglund, Richard F.; Boatner, L. A.; White, C. W.

doi:10.1002/1521-4095(200110)13:19<1431::aid-adma1431>3.0.co;2-z

Cited by 263 publications

(178 citation statements)

References 66 publications

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“…3,4 Dielectrics with embedded nanoparticles exhibit many useful properties such as nonlinear optical behavior, superparamagnetism, intense photoluminescence, and altered band structures. 5,6 The incorporation of Ti ions into SiO 2 (SiO 2 :Ti) is an exciting topic because of the electronic properties of the constituents. The combination of the abundant Ti 3d conduction band states (due to the formally empty 3d shell of Ti 4þ ) and the very wide band gap of SiO 2 implies a situation for strong electronic structure modification upon doping.…”

Section: Introductionmentioning

confidence: 99%

The formation of Ti–O tetrahedra and band gap reduction in SiO2 via pulsed ion implantation

Green

Zatsepin

Hunt

et al. 2013

Journal of Applied Physics

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Titanium ions are implanted into amorphous SiO 2 at two different fluences using pulsed ion implantation, and the resulting samples are annealed. Bulk sensitive soft X-ray absorption spectroscopy of the Ti L 2;3 edge reveal strikingly different spectra for the two fluences. Spectral simulations using multiplet crystal field theory show clearly that for low fluence the Ti ions have a local octahedral coordination, while at higher fluence the formation of Ti 4þ -O tetrahedra dominates. Using O K-edge X-ray absorption and emission, the effect of the Ti states on the valence and conduction bands of the host SiO 2 is revealed. With the introduction of Ti tetrahedra, the band gap reduces from about 8 eV to just over 4 eV, due entirely to the Ti 3d conduction band states. These results demonstrate the possibility to obtain Ti-O tetrahedra in silica by Ti ion implantation and a suitable thermal treatment, clarify the mechanism of band gap reduction with Ti doping in SiO 2 , and demonstrate the sensitivity of L-edge X-ray absorption with a multiplet crystal field theory analysis to the Ti coordination of novel materials. V C 2013 American Institute of Physics. [http://dx

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Section: Introductionmentioning

confidence: 99%

The formation of Ti–O tetrahedra and band gap reduction in SiO2 via pulsed ion implantation

Green

Zatsepin

Hunt

et al. 2013

Journal of Applied Physics

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“…In particular, the drive for further miniaturization of electronic, magnetic and photonic devices has led to numerous experimental and theoretical efforts to understand the physical properties of various metal and semiconductor nanoparticles (NPs) with emphasis on the effects of size, shape and host matrix (see for example [1][2][3][4][5][6][7]). Furthermore, metallic NPs embedded in a dielectric host matrix (such as SiO 2 ) are of particular interest as their unique nonlinear opto-electrical properties have direct applications in nano-electronic devices (e.g., in optical memories, nonlinear waveguide devices and optical switches) [8].…”

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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“…Nanocomposites produced by ion implantation have many attractive characteristics with respect to nonlinear optics [1,12,13]. Both metal and semiconductor nanocrystals can exhibit pronounced third-order optical susceptibility, although for somewhat different reasons.…”

Section: Nonlinear Optical Materialsmentioning

confidence: 99%

“…Next, some of the most attractive optical and electronic properties of nanocomposites produced by ion implantation will be briefly surveyed. Some aspects of the following will be based on a recent comprehensive review paper on nanocrystals produced by ion implantation, which we refer the reader to as the main citable reference [1]. The physics responsible for the optoelectronic properties of nanocrystals produced by ion implantation will also be touched on in this chapter, and is derived in more detail in subsequent chapters.…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of Nanoparticles Formed by Ion Implantation

Meldrum

López

Magruder

et al. 2009

Topics in Applied Physics

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Abstract. This chapter broadly describes the formation, basic microstructure, and fundamental optoelectronic properties of nanocomposites synthesized by ion implantation. It is not meant as a complete literature survey and by no means includes all references on a subject that has seen a considerable amount of research effort in the past 15 years. However, it should be a good starting point for those new to the field and in a concise way summarize the main lines of research by discussing the optical, magnetic, and "smart" properties of these nanoparticles and the dependence of these properties on the overall microstructure. The chapter concludes with an outlook for the future.

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Nanocomposite Materials Formed by Ion Implantation

Cited by 263 publications

References 66 publications

The formation of Ti–O tetrahedra and band gap reduction in SiO2 via pulsed ion implantation

The formation of Ti–O tetrahedra and band gap reduction in SiO2 via pulsed ion implantation

Ion Beam Formation and Modification of Cobalt Nanoparticles

Structure and Properties of Nanoparticles Formed by Ion Implantation

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