Optical properties and luminescence of metallic nanoclusters in ZnO:Cu

Karalı, T.; Can, N.; Valberg, L.; Степанов, А. Л.; Townsend, Peter; Buchal, Ch.; Ganeev, R. A.; Ryasnyansky, A.I.; Belik, H. Güngör; Jessett, M.L.; Ong, C. K.

doi:10.1016/j.physb.2005.03.006

Cited by 58 publications

(20 citation statements)

References 32 publications

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“…Earlier ZnO data had revealed that both Cu and Tb implants displaced the TL emission patterns from that of the unimplanted material. [12][13][14] This type of change was observed again in the current study, as shown by Fig. 5.…”

Section: A Structural Relaxations Of Substratessupporting

confidence: 83%

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Substrate lattice relaxations, spectral distortions, and nanoparticle inclusions of ion implanted zinc oxide

Wang

Zhang

et al. 2015

Journal of Applied Physics

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Low temperature radioluminescence and thermoluminescence spectra of ZnO track numerous changes produced by copper ion implantation into the surface layer. A significant, but unexpected, feature is that the bulk crystal becomes modified by the stress generated in the surface layer. This is reflected by the energy of intrinsic band gap emission. There are also differences in the spectra and peak temperatures of the thermoluminescence components, consistent with such a structural relaxation. The copper implant layer is both absorbing and reflective, so this introduces major distortions on the radioluminescence component from the bulk region, since the bulk luminescence signals are transmitted through, or reflected from, the implant layer. The temperature dependence of the spectra includes anomalies that are typical of changes driven by phase transitions of nanoparticle inclusions. Overall, the features of bulk relaxation, spectral distortion, and detection of nanoparticle inclusions are rarely considered for ion implanted luminescence studies, but the data suggest they are almost inevitable in a wide range of implanted materials.

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Section: A Structural Relaxations Of Substratessupporting

confidence: 83%

“…[12][13][14] There is, therefore, the potential that similar bulk changes from surface implants may be a more general feature, but they have rarely been discussed or sought, but clearly should be.…”

Section: Introductionmentioning

confidence: 99%

Substrate lattice relaxations, spectral distortions, and nanoparticle inclusions of ion implanted zinc oxide

Wang

Zhang

et al. 2015

Journal of Applied Physics

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“…36,37 The other broad band, peaking at 440 nm, was attributed to the deep defect levels of oxygen vacancies or interstitial zinc ions. [38][39][40][41] Vendhausen et al 42 assigned the green emission at 510 nm to the transition between the photoexcited holes and singly ionized oxygen vacancy.…”

Section: Salah Et Almentioning

confidence: 99%

High-energy ball milling technique for ZnO nanoparticles as antibacterial material

Salah¹,

Habib²,

Khan³

et al. 2011

IJN

219

107

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Nanoparticles of zinc oxide (ZnO) are increasingly recognized for their utility in biological applications. In this study, the high-energy ball milling (HEBM) technique was used to produce nanoparticles of ZnO from its microcrystalline powder. Four samples were ball milled for 2, 10, 20, and 50 hours, respectively. The structural and optical modifications induced in the ‘as synthesized’ nanomaterials were determined by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and photoluminescence emission spectra (PL). SEM and TEM results show a gradual decrease in particle size from around 600 to ∼30 nm, with increased milling time. The initial microstructures had random shapes, while the final shape became quite spherical. XRD analysis showed ZnO in a hexagonal structure, broadening in the diffracted peaks and going from larger to smaller particles along with a relaxation in the lattice constant c . The value of c was found to increase from 5.204 to 5.217 Å with a decrease in particle size (600 to ∼30 nm). PL result showed a new band at around 365 nm, whose intensity is found to increase as the particles size decreases. These remarkable structural and optical modifications induced in ZnO nanoparticles might prove useful for various applications. The increase in c value is an important factor for increasing the antibacterial effects of ZnO, suggesting that the HEBM technique is quite suitable for producing these nanoparticles for this purpose.

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“…5(b). Karali [6,16] that can serve as charge trappers. Trapping of charges is known to be the underlying cause of the formation of huge potential barriers against current flow resulting in G range resistance.…”

Section: Electrical-optical Analysesmentioning

confidence: 99%

“…The rich structural diversity of zinc oxide (ZnO) has attracted immense research activity especially due its potential and current applications in UV/blue LEDs, piezoelectric devices, transparent electronics, chemical nanosensors, spin electronics, optoelectronic displays, UV lasing, electro-optical switches, varistors, ferrites, ceramics, rubber vulcanization, pharmaceuticals, cosmetics and textiles [1][2][3][4][5][6]. Moreover, ZnO can be synthesized in many shapes resembling wires, rods, tubes, spirals, rings, bows, belts, helixes, tripods, tetrapods, combs, propellers, drums, polyhedrons, discs, cages, flowers, stars, boxes, mallets and plates [1,[7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

One-dimensional growth of zinc oxide nanostructures from large micro-particles in a highly rapid synthesis

Mahmud

2011

Journal of Alloys and Compounds

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Optical properties and luminescence of metallic nanoclusters in ZnO:Cu

Cited by 58 publications

References 32 publications

Substrate lattice relaxations, spectral distortions, and nanoparticle inclusions of ion implanted zinc oxide

Substrate lattice relaxations, spectral distortions, and nanoparticle inclusions of ion implanted zinc oxide

High-energy ball milling technique for ZnO nanoparticles as antibacterial material

One-dimensional growth of zinc oxide nanostructures from large micro-particles in a highly rapid synthesis

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