Luminescence characteristics of impurities-activated ZnS nanocrystals prepared in microemulsion with hydrothermal treatment

Xu, Shijie; Chua, S. J.; Liu, B.; Gan, L. M.; Chew, C. H.; Xu, Guodong

doi:10.1063/1.121906

Cited by 226 publications

(124 citation statements)

References 17 publications

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“…Recently, strenuous efforts have been made to solve this problem by doping RE ions in semiconductor particles such as ZnS, CdS and TiO 2 , through sol-gel processing or the co-precipitation method. [3][4][5][6][7][8] The characteristic emission of RE ions has been observed from some of the doped semiconductors. However, Bol, Beek, and Meijerink reported 8 that RE ions are mostly adsorbed at the particle surface in these doped semiconductors and the characteristic emission of RE ions is not due to the energy absorbed by the host but RE ions themselves.…”

mentioning

confidence: 99%

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Xin

Wang

et al. 2004

Applied Physics Letters

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Fluorescent semiconductor materials doped with rare earth ions have been synthesized by flocculation of colloidal titania nanosheets, Ti0.91O2, with Eu3+ or Tb3+ ions. The composites had a lamellar structure with a gallery height of 1.06nm, accommodating rare earth ions between the nanosheets with a doping concentration as high as 10±1mol%. The composite with Eu3+ exhibited intense characteristic emission from Eu3+ either by exciting the Ti0.91O2 host with UV light (λ<350nm) or by directly exciting Eu3+ at a longer wavelength where there was no absorption by Ti0.91O2. This indicates that nonradiative energy transfer from the Ti0.91O2 host to Eu3+ can take place in this system. In contrast, no energy transfer was observed in the composite with Tb3+.

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confidence: 99%

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Xin

Wang

et al. 2004

Applied Physics Letters

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“…Limiting the attention to wet chemistry approaches, a wide plethora of synthetic routes has been proposed in the literature to prepare metal sulphide colloids ranging from non-aqueous sol-gel routes [70][71][72][73], hydro/solvothermal [24,[74][75][76][77][78][79][80][81][82][83][84][85][86], to sono- [19, and radiochemistry [111][112][113][114][115][116][117], laser ablation [118,119], micro- [120][121][122][123][124][125][126][127][128][129][130] and miniemulsion synthesis [131][132][133][134][135][136][137][138], seeded-growth [139] and nucleation/g...…”

Section: Transition Metal Sulphides: Analogies and Differences With Rmentioning

confidence: 99%

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

2017

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Abstract:Metal sulphides, and in particular transition metal sulphide colloids, are a broad, versatile and exciting class of inorganic compounds which deserve growing interest and attention ascribable to the functional properties that many of them display. With respect to their oxide homologues, however, they are characterised by noticeably different chemical, structural and hence functional features. Their potential applications span several fields, and in many of the foreseen applications (e.g., in bioimaging and related fields), the achievement of stable colloidal suspensions of metal sulphides is highly desirable or either an unavoidable requirement to be met. To this aim, robust functionalisation strategies should be devised, which however are, with respect to metal or metal oxides colloids, much more challenging. This has to be ascribed, inter alia, also to the still limited knowledge of the sulphides surface chemistry, particularly when comparing it to the better established, though multifaceted, oxide surface chemistry. A ground-breaking endeavour in this field is hence the detailed understanding of the nature of the complex surface chemistry of transition metal sulphides, which ideally requires an integrated experimental and modelling approach. In this review, an overview of the state-of-the-art on the existing examples of functionalisation of transition metal sulphides is provided, also by focusing on selected case studies, exemplifying the manifold nature of this class of binary inorganic compounds.

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“…Different transition metal doped ZnS NCs such as ZnS:Mn [5], ZnS:Cu [6], ZnS:Ni [7] and ZnS:Cr [10], were investigated during recent years. Recently, ZnS and doped ZnS NCs have been synthesized by various methods, including solid-state reaction [11], sol-gel process [12], hydrothermal method [13], organic metallic method [14], micro-emulsion technique [15], and reverse micelle method [16]. However, these synthesis approaches are relatively more complicated and some of these methods require longer processing times, high temperatures and use of non-aqueous solvents.…”

Section: Introductionmentioning

confidence: 99%

A simple one Step Thermochemical Approach for Synthesis of ZnS:Mn Nanocrystals (NCs)

Molaei

Lotfiani²,

Karimimaskon³

et al. 2014

JSTS:Journal of Semiconductor Technology and Science

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Abstract-In this work we have synthesized ZnS:Mn nanocrystals (NCs) using a simple one step thermochemical method. Zn(NO 3 ) 2 and Na 2 S 2 O 3 were used as the precursors and Mn(NO 3 ) 2 was the source of impurity. Thioglycolic acid (TGA) was used as the capping agent and the catalyst of the reaction. The structure and optical property of the NCs were characterized by means of X-ray diffraction (XRD), HRTEM, UV-visible optical spectroscopy and photoluminescence (PL). X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses demonstrated cubic phase ZnS:Mn NCs with an average size around 3 nm. Synthesized NCs exhibited band gap of about 4 eV. Photoluminescence spectra showed a yellow-orange emission with a peak located at 585 nm, demonstrating the Mn incorporation inside the ZnS particles.

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Luminescence characteristics of impurities-activated ZnS nanocrystals prepared in microemulsion with hydrothermal treatment

Cited by 226 publications

References 17 publications

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

A simple one Step Thermochemical Approach for Synthesis of ZnS:Mn Nanocrystals (NCs)

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