Particle size control of PbTe quantum dots incorporated in the germano-silicate glass optical fiber by heat treatment

Ju, Seongmin; Watekar, Pramod R.; Kim, Cheol Jin; Han, Won‐Taek

doi:10.1016/j.jnoncrysol.2010.07.042

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…and diverse lead-bearing quantum dots (e.g., PbS). [17][18][19][20][21][22][23][24] Because of the potential environmental and health risk by the exposure of Pb from the Pb-bearing materials, there are restrictions on using Pb. 25 Such a remarkable glass-forming ability of Pb-bearing silicate glasses and the slower dissolution behavior of Pb can be explained from the short-range configurations around Pb and oxygens (e.g., 9,11,12,26 ).…”

Section: Introductionmentioning

confidence: 99%

“…PbO‐SiO 2 glasses with Na 2 O can be utilized for coating of thermoelectric materials due mainly to their thermal stability 13,14 . Pb‐bearing silicate glasses have been reported to be potential effective host materials for oxide nanoclusters 15,16 and diverse lead‐bearing quantum dots (e.g., PbS) 17‐24 . Because of the potential environmental and health risk by the exposure of Pb from the Pb‐bearing materials, there are restrictions on using Pb 25…”

Section: Introductionmentioning

confidence: 99%

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Structure and disorder in Pb‐Na metasilicate (PbO:Na₂O:2SiO₂) glasses: A view from high‐resolution ¹⁷O solid‐state NMR

et al. 2020

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Knowledge of the structure of lead (Pb)-bearing silicate glasses, such as degree of polymerization and arrangement among cations, provides improved prospects for understanding their macroscopic properties. Despite the importance, the detailed disorder in Pb-bearing silicate glasses with varying composition (i.e., Pb/alkali content) has not been systematically explored. Here, we reveal the first unambiguous structural information of PbO-Na 2 O-SiO 2 glasses with varying PbO content [i.e., X PbO = PbO/(Na 2 O + PbO)], which are the fundamental model system for multicomponent Pb-bearing glasses, using high-resolution 17 O solid-state NMR. 17 O NMR spectra clearly show the resolved multiple oxygen sites, such as Na-O-Si, Si-O-Si, and [Na,Pb]-O-Si. As X PbO increases, the fraction of [Na,Pb]-O-Si peak increases markedly at the expanse of substantial reduction in the fraction of Na-O-Si/ total NBO. This trend indicates the relative predominance of the dissimilar pairs around non-bridging oxygen (NBO) and, therefore, can be explained well with the pronounced chemical ordering among Na + and Pb 2+. These results confirm that Pb is primarily a network-modifier in the glasses studied here. Atomic environments around both NBO and BO are affected by the change in Na/Pb ratio, while topological disorder due to cation mixing around NBO is much more prominent in Pb endmember. The structural details of short-range configurations around oxygen in alkali Pb-silicate glasses provide atomistic insights for understanding the properties of Pb-bearing multicomponent silicate glasses.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure and disorder in Pb‐Na metasilicate (PbO:Na₂O:2SiO₂) glasses: A view from high‐resolution ¹⁷O solid‐state NMR

et al. 2020

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“…Various post-processing techniques of the irradiation by the pulsed laser, the charged ion, and the γ-ray have been investigated to control NPs with desired size and shape [13,43,44,45,46,47,48,49,50]. Our group has reported a heat treatment method to control the size of NPs in glass fiber [51,52]. Among such post-irradiation processing techniques, the high energy irradiation was proven to control effectively the size, shape, and spacing of the NPs by creating ion tracks resulting from Coulomb explosion and/or thermal spikes accompanying the excitations [53,54,55,56].…”

Section: Introductionmentioning

confidence: 99%

Effect of Gamma-Ray Irradiation on the Growth of Au Nano-Particles Embedded in the Germano-Silicate Glass Cladding of the Silica Glass Fiber and its Surface Plasmon Resonance Response

Han

2019

Sensors

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The effect of γ-ray irradiation on the surface plasmon resonance (SPR) sensing capability of refractive index (n = 1.418–1.448) of the silica glass optical fiber comprised of germano-silicate glass cladding embedded with Au nano-particles (NPs) was investigated. As the γ-ray irradiation increased from 1 h to 3 h with the dose rate of 1190 Gy/h, the morphology of the Au NPs and the SPR spectrum were found to change. The average diameter of Au NPs increased with the aspect ratio from 1 to 2, and the nano-particles became grown to the clusters. The SPR band wavelength shifted towards a longer wavelength with the increase of total dose of γ-ray irradiation regardless of the corresponding refractive indices. The SPR sensitivities (wavelength/refractive index unit, nm/RIU) also increased from 407 nm/RIU to 3553 nm/RIU, 1483 nm/RIU, and 2335 nm/RIU after the γ-ray irradiation at a total dose of 1190 Gy, 2380 Gy, and 3570 Gy, respectively.

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“…Furthermore, various post-processing techniques of the irradiation by the pulsed laser, the charged ion, and the γ-ray have been investigated to control NPs with desired size and shape [33][34][35][36][37][38][39][40]. Our group has reported a heat treatment method to control the size of NPs in glass fiber [41][42]. Among such post irradiation processing techniques, the high energy irradiation was proven to control effectively the size, shape, and spacing of the NPs by creating ion tracks resulting from Coulomb explosion and/or thermal spikes accompanying the excitations [43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Effect of Gamma-Ray Irradiation on the Growth of Au Nano-Particles Embedded in the Germano-Silicate Glass Cladding of the Silica Glass Fiber and its Surface Plasmon Resonance Response

Ju¹,

Han²

2019

Preprint

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The effect of γ-ray irradiation on surface plasmon resonance (SPR) sensing capability of refractive index (n = 1.418–1.448) of the silica glass optical fiber comprised of germano-silicate glass cladding embedded with Au nano-particles (NPs) was investigated. As the γ-ray irradiation increased from 1 hour to 3 hours with the dose rate of 1,190 Gy/h, the morphology of the Au NPs and the SPR spectrum were found to change. The average diameter of Au NPs increased with the aspect ratio from 1 to 2 and the nano-particles became grown to the clusters. The SPR peak wavelength shifted towards longer wavelength with the increase of total dose of γ-ray irradiation regardless of the corresponding refractive indices. The SPR sensitivities (wavelength/refractive index unit, nm/RIU) also increased from 407 nm/RIU to 3,553 nm/RIU, 1,483 nm/RIU, and 2,335 nm/RIU after the γ-ray irradiation at the total dose of 1,190 Gy, 2,380 Gy, and 3,570 Gy, respectively.

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Particle size control of PbTe quantum dots incorporated in the germano-silicate glass optical fiber by heat treatment

Cited by 7 publications

References 30 publications

Structure and disorder in Pb‐Na metasilicate (PbO:Na₂O:2SiO₂) glasses: A view from high‐resolution ¹⁷O solid‐state NMR

Structure and disorder in Pb‐Na metasilicate (PbO:Na₂O:2SiO₂) glasses: A view from high‐resolution ¹⁷O solid‐state NMR

Effect of Gamma-Ray Irradiation on the Growth of Au Nano-Particles Embedded in the Germano-Silicate Glass Cladding of the Silica Glass Fiber and its Surface Plasmon Resonance Response

Effect of Gamma-Ray Irradiation on the Growth of Au Nano-Particles Embedded in the Germano-Silicate Glass Cladding of the Silica Glass Fiber and its Surface Plasmon Resonance Response

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Particle size control of PbTe quantum dots incorporated in the germano-silicate glass optical fiber by heat treatment

Cited by 7 publications

References 30 publications

Structure and disorder in Pb‐Na metasilicate (PbO:Na2O:2SiO2) glasses: A view from high‐resolution 17O solid‐state NMR

Structure and disorder in Pb‐Na metasilicate (PbO:Na2O:2SiO2) glasses: A view from high‐resolution 17O solid‐state NMR

Effect of Gamma-Ray Irradiation on the Growth of Au Nano-Particles Embedded in the Germano-Silicate Glass Cladding of the Silica Glass Fiber and its Surface Plasmon Resonance Response

Effect of Gamma-Ray Irradiation on the Growth of Au Nano-Particles Embedded in the Germano-Silicate Glass Cladding of the Silica Glass Fiber and its Surface Plasmon Resonance Response

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Structure and disorder in Pb‐Na metasilicate (PbO:Na₂O:2SiO₂) glasses: A view from high‐resolution ¹⁷O solid‐state NMR

Structure and disorder in Pb‐Na metasilicate (PbO:Na₂O:2SiO₂) glasses: A view from high‐resolution ¹⁷O solid‐state NMR