The Sb<sub>2</sub>O<sub>3</sub> redox route to obtain copper nanoparticles in glasses with plasmonic properties

Franco, Douglas F.; Sant’Ana, Antônio Carlos; Oliveira, Luiz Fernando Cappa de; Silva, Maurı́cio A. P.

doi:10.1039/c5tc00102a

Cited by 34 publications

(14 citation statements)

References 28 publications

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“…9 However, preparation of Cu nanocomposites is a challenging task since copper can acquire various oxidation states (Cu 2+ , Cu + , Cu 0 ), and the predominant stability is for the Cu 2+ ion, especially for syntheses carried out in air atmosphere. 10 Hence, inclusion of suitable reducing agents such as tin(II) oxide 11,12 or antimony(III) oxide 13,14 as part of the glass material has been proposed, aiming to control the oxidation states of copper.…”

Section: Introductionmentioning

confidence: 99%

Silicon as Reducing Agent for Controlled Production of Plasmonic Copper Nanocomposite Glasses: A Spectroscopic Study

Jiménez

2015

Journal of Elec Materi

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The use of silicon to produce metal nanocomposite phosphate glasses with plasmonic properties is proposed. It is demonstrated how the reducing properties of Si powder allow for producing Cu nanocomposite glasses in a controlled manner during heat treatment (HT). Cu/Si-codoped glasses were prepared in a 50BaO-50P 2 O 5 matrix by a simple melt-quench method in ambient atmosphere. The worst-case scenario is considered by having the noble metal introduced in its higher oxidation state as copper(II) oxide, i.e., instead of using monovalent copper. Optical absorption and photoluminescence (PL) spectroscopy, including emission decay dynamics, were employed for characterization of the melt-quenched glass, and for investigating the influence of HT on material optical properties. Remarkably, increasing amounts of Si powder were observed to suppress and ultimately remove the Cu 2+ visible absorption band in the CuO-containing glasses. Moreover, subsequent HT of the glass with the highest Si content resulted in progressive development of the surface plasmon resonance of Cu nanoparticles with increasing holding time. PL spectroscopy analysis is further employed towards elucidating the Cu 2+ fi Cu + fi Cu 0 valence state changes likely occurring during the melting and subsequent thermal processing.

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Section: Introductionmentioning

confidence: 99%

Silicon as Reducing Agent for Controlled Production of Plasmonic Copper Nanocomposite Glasses: A Spectroscopic Study

Jiménez

2015

Journal of Elec Materi

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“…The Raman spectrum in the range of 200−750 cm −1 is very broad and is dominated by the Sb 2 O 3 vibrational modes. 47 It has been recently reported that the vitreous antimony materials exhibit a complex Raman spectrum consisting of three broad bands located at 605, 465, and 408 cm −1 . 48 The 605 cm −1 band was assigned to the antisymmetric stretching vibrations of the Sb−O−Sb bridges.…”

Section: Raman Spectroscopymentioning

confidence: 99%

Structural and Femtosecond Third-Order Nonlinear Optical Properties of Sodium Borate Oxide Glasses: Effect of Antimony

et al. 2019

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Structural and optical properties of antimony-containing sodium borate glasses were studied and their ultrafast third-order nonlinear optical (NLO) properties have been evaluated using Z-scan measurements with femtosecond (fs) pulses (∼150 fs, 80 MHz) at 750, 800, and 880 nm wavelengths. Glasses in the (mol %) 20Na 2 O−(80 − x)B 2 O 3 −xSb 2 O 3 (where x = 0, 10, 20, and 30) system have been fabricated via melt quench technique. The structural modifications were analyzed using the Raman and magic angle spinning (MAS)-nuclear magnetic resonance (NMR) ( 11 B MAS-NMR and 23 Na MAS-NMR) techniques. The optical absorption spectra revealed that the absorption edge was red-shifted, suggesting the decrease in band gap energy with increase of antimony content in the glasses. Raman scattering results revealed that the boroxol rings are depressed with the incorporation of Sb 2 O 3 for replacing B 2 O 3 . 11 B MAS-NMR results showed a progressive increase of B 4 units at the expense of B 3 units. The Raman and 11 B MAS-NMR results support the formation of Sb 5+ ions due to oxidation of Sb 3+ that played the role of charge compensation. 23 Na MAS-NMR spectra revealed a decreasing trend in the average of bond lengths of Na−O with increasing Sb 2 O 3 contents. This suggested that sodium changed its role from charge compensator to modifier cation. The antimony-containing glasses demonstrated a reverse saturable absorption in open-aperture Z-scan mode due to two-photon absorption, while closed-aperture Z-scan signatures depicted positive nonlinear refraction due to self-focusing effect. The NLO coefficients were found to increase with Sb 2 O 3 due to the increased nonbridging oxygens and also due to the hyperpolarizability of Sb 3+ and Sb 5+ ions. The observed NLO data clearly suggest that the investigated glasses are beneficial for optical limiting applications.

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“…However, the direct production of MNPs inside the glasses in melt-quench approach is an arduous task due to oxidation processes occurring at elevated temperature while melting the precursors. Douglas et al [19] have recently demonstrated that choosing the thermal reducing agent in the glass composition produces a highly uniform and homogeneous distribution of MNPs inside the glasses. In addition to the considerable reports on NLO properties glasses doped with MNPs, recently, Rajaramakrishna et al [20] have reported that gold NP-doped borate glasses demonstrated good saturable absorption (SA) at 532 nm, nanosecond (ns) pulses.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical studies of sodium borate glasses embedded with gold nanoparticles

et al. 2018

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Optical glasses possessing large third-order optical nonlinear susceptibility and fast response times are promising materials for the development of advanced nonlinear photonic devices. In this context, gold nanoparticle (NP)-doped borate glasses were synthesized via the melt-quench method. The nonlinear optical (NLO) properties of thus prepared glasses were investigated at different wavelengths (i.e., at 532 nm using nanosecond pulses, at 750 nm, 800 nm, and 850 nm wavelengths using femtosecond, MHz pulses). At 532 nm, open aperture (OA) Z-scan signatures of gold NP-doped borate glasses demonstrated reverse saturable absorption (RSA), attributed to mixed intra-band and interband transitions, while in the 750-850 nm region, the OA Z-scan data revealed the presence of saturable absorption (SA), possibly due to intra-band transitions. The NLO coefficients were evaluated at all the spectral regions and further compared with some of the recently reported glasses. The magnitudes of obtained NLO coefficients clearly demonstrate that the investigated glasses are potential materials for photonic device applications.

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The Sb₂O₃ redox route to obtain copper nanoparticles in glasses with plasmonic properties

Abstract: Production of oxide glasses containing CuII, CuI and Cu0 nanoparticles by redox process during melting without subsequent thermal treatment.

Cited by 34 publications

References 28 publications

Silicon as Reducing Agent for Controlled Production of Plasmonic Copper Nanocomposite Glasses: A Spectroscopic Study

Silicon as Reducing Agent for Controlled Production of Plasmonic Copper Nanocomposite Glasses: A Spectroscopic Study

Structural and Femtosecond Third-Order Nonlinear Optical Properties of Sodium Borate Oxide Glasses: Effect of Antimony

Nonlinear optical studies of sodium borate glasses embedded with gold nanoparticles

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The Sb2O3 redox route to obtain copper nanoparticles in glasses with plasmonic properties

Abstract: Production of oxide glasses containing CuII, CuI and Cu0 nanoparticles by redox process during melting without subsequent thermal treatment.

Cited by 34 publications

References 28 publications

Silicon as Reducing Agent for Controlled Production of Plasmonic Copper Nanocomposite Glasses: A Spectroscopic Study

Silicon as Reducing Agent for Controlled Production of Plasmonic Copper Nanocomposite Glasses: A Spectroscopic Study

Structural and Femtosecond Third-Order Nonlinear Optical Properties of Sodium Borate Oxide Glasses: Effect of Antimony

Nonlinear optical studies of sodium borate glasses embedded with gold nanoparticles

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The Sb₂O₃ redox route to obtain copper nanoparticles in glasses with plasmonic properties