Synthesis and photoluminescence of ZnS:Cu nanoparticles

Peng, Wenqin; Cong, Guangwei; Qu, Shengchun; Wang, Z.G.

doi:10.1016/j.optmat.2005.10.003

Cited by 363 publications

(152 citation statements)

References 17 publications

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“…In addition, a shoulder emerged in the red region of the Cu:CdS d-dots' emission spectrum but was absent in that of the host, which was ordinarily attributed to the surface trap emission of the d-dots. 20,24,28,29 However, all synthesis conditions of these two samples were set to the same except the presence or absence of Cu 2+ , and the dopant would be located in the interior of the d-dots according to the doping method we employed. 29 Therefore it is indicated that the shoulder was attributed to the incorporation of Cu 2+ , not the surface trap.…”

Section: Resultsmentioning

confidence: 99%

One-pot aqueous synthesis of composition-tunable near-infrared emitting Cu-doped CdS quantum dots as fluorescence imaging probes in living cells

Zhang

et al. 2012

J. Mater. Chem.

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In the last two decades, near-infrared (NIR) emitting Cu-doped quantum dots (QDs) have stimulated stupendous research interest for their excellent optical properties. Due to the synthetic method in the organic phase, almost none of the NIR emitting Cu-doped QDs were used as the fluorescent probes for biological imaging, despite being employed for applications in many fields. In this work, we successfully synthesized water-soluble Cu-doped CdS quantum dots (Cu:CdS d-dots) with an emission wavelength at 722 nm using a fast and facile hydrothermal method. The optical properties of the d-dots and several key parameters of the synthesis conditions such as dopant concentration, reaction temperature, reflux time, and especially the pH of the reaction mixture were systematically studied, and the mechanism of these parameters is also discussed. A red shift of the emission maximum as a consequence of the increased reaction temperature was observed, but it does not move to the NIR region until Cu 2+ is doped even at the highest reflux temperature in aqueous solution. The d-dots have good water solubility and biocompatibility for successful labeling the living HeLa cells as fluorescence probe.

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Section: Resultsmentioning

confidence: 99%

One-pot aqueous synthesis of composition-tunable near-infrared emitting Cu-doped CdS quantum dots as fluorescence imaging probes in living cells

Zhang

et al. 2012

J. Mater. Chem.

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“…This indicates the fact that dopant was interfering with the active principle as the MIC values are greater in doped ZnO nanoparticles as compared to undoped ZnO nanoparticles for different groups of bacteria and fungi. It has been found from some previous studies that doping may increase the antimicrobial effect (rekha et al 2010 , rare earth and transition elements, brings about significant changes in the physical, chemical and biological properties of host material on doping depending on the type of dopant and its concentration (Peng et al 2006, Zhang et al 2006. The increase in antibacterial and photocatalytic activity with increase in dopants concentration is attributed to the generation of reactive oxygen species (rOS).…”

Section: Discussionmentioning

confidence: 99%

Synergistic activity of doped zinc oxide nanoparticles with antibiotics: ciprofloxacin, ampicillin, fluconazole and amphotericin B against pathogenic microorganisms

Sharma

Jandaik

Kumar³

2016

An. Acad. Bras. Ciênc.

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Combination therapy of antibiotics and nanoparticles can be used against multi drug resistant microorganisms. Nanoparticles (NPs) have been reported to show antimicrobial activity. The antimicrobial activities of doped ZnO nanoparticles (ZnO NPs) were studied against fungi, gram-positive and gramnegative bacteria using the standard microdilution method. The interaction between the nanoparticle and the antibiotic was estimated by calculating the fractional inhibitory concentration (FIC index) of the combination through checkerboard assay. Experimental results demonstrated that 10% doped zinc oxide nanoparticles (ZnO NPs) exhibited the maximum antimicrobial effect in contrast with that of the 1% loading and pure ZnO nanoparticles. The enhancement in antimicrobial effect was seen when combined with antibiotic. Synergistic and additive effects were found. No antagonistic effect was found. More synergistic effect was observed when combined with ciprofloxacin than ampicillin. Fungus showed only additive effect. The results are quite in terms with MIC clearly depicting that high doping agent is most suitable for combined therapy. 100% synergistic interaction was observed in higher doping with both ciprofloxacin and ampicillin. This study provides a preliminary report of the synergistic activity of nanoparticles with antibiotics against different pathogenic strains. This provides groundwork for further studies on the combination therapy of nanoparticles with antibiotics.

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“…Copper doping has been reported to strongly influence resistivity and band gap [16][17] . Increase of Cu 2+ concentration has been reported to result in quenching of luminescence due to formation of CuS 18 . Doping with Mn has been reported to give highly transparent ZnS film along with quantum size effect 19 .…”

Section: Introductionmentioning

confidence: 99%

Characterization of Sn Doped ZnS Thin Films Synthesized by CBD

Mukherjee

Mitra

2017

Mat. Res.

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Zinc sulphide (ZnS) thin film were prepared using chemical bath deposition (CBD) process and tin (Sn) doping was successfully carried out in ZnS. Structural, morphological and microstructural characterization was carried out using XRD, TEM, FESEM and EDX. XRD and SAED pattern confirms presence of hexagonal phase. Reitveld analysis using MAUD software was used for particle size estimation. A constantly decreasing trend in particle size was observed with increasing tin incorporation in ZnS film which was due to enhanced microstrain resulting for tin incorporation. The particle size of prepared hexagonal wurtzite ZnS was around 14-18 nm with average size of ~16.5 nm. The bandgap of the film increases from ~ 3.69 eV for ZnS to ~ 3.90 eV for 5% Sn doped ZnS film which might be due to more ordered hexagonal structure as a result of tin incorporation. Band gap tenability property makes Sn doped ZnS suitable for application in different optoelectronics devices. PL study shows variation of intensity with excitation wavelength and a red shift is noticed for increasing excitation wavelength.

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Synthesis and photoluminescence of ZnS:Cu nanoparticles

Cited by 363 publications

References 17 publications

One-pot aqueous synthesis of composition-tunable near-infrared emitting Cu-doped CdS quantum dots as fluorescence imaging probes in living cells

One-pot aqueous synthesis of composition-tunable near-infrared emitting Cu-doped CdS quantum dots as fluorescence imaging probes in living cells

Synergistic activity of doped zinc oxide nanoparticles with antibiotics: ciprofloxacin, ampicillin, fluconazole and amphotericin B against pathogenic microorganisms

Characterization of Sn Doped ZnS Thin Films Synthesized by CBD

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