In situ synthesis of highly luminescent glutathione-capped CdTe/ZnS quantum dots with biocompatibility

Liu, Yingfan; Yu, Junsheng

doi:10.1016/j.jcis.2010.07.047

Cited by 109 publications

(80 citation statements)

References 41 publications

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“…Broad and asymmetric emission spectra indicate that there may be superposition of more than one peak. In comparison with the photoluminescence results of the other researchers [2][3][4][5][6][7][8][9][10][11], it is clear that the properties of core-shell quantum dots are tunable only at a specific values of synthesis conditions either it is molar concentration, pH, temperature, host quantum dot or the capping agent. In the present case, the PL results shows that the properties can be tunable at higher concentration (C2%) of glutathione capping, as not much change has been seen in the results at lower concentration(0.01-1%) of glutathione capping.…”

Section: Particle Size Studiesmentioning

confidence: 86%

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Effect of biocompatible glutathione capping on core–shell ZnS quantum dots

Singhal

Sharma

Kumar

2011

J Mater Sci: Mater Electron

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Glutathione capped quantum dots are a potential candidate for different applications like ligand exchange in living cells, cell imaging and detection of glucose levels. Keeping these in mind, glutathione capped ZnS quantum dots were synthesized by using the thiol group of the capping agent by chemical precipitation method. Morphological characterizations were done by XRD and TEM. X-ray diffraction (XRD) measurements showed that the nanocrystals have Zinc Blende structure. Grain size and particle size shows a little variation with glutathione capping. Optical characterizations were done by UV-visible absorption, FTIR and energy resolved photoluminescence. UV-visible studies shows that the band gap also shows a small variation with glutathione capping. FTIR studies confirm glutathione capping on the surface of ZnS quantum dots. Room temperature energy resolved photoluminescence spectrum of samples exhibited a defect-related blue emission band. However, the PL properties seem to start tunability at higher concentration of glutathione which is a very good sign for extending this research further.

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Section: Particle Size Studiesmentioning

confidence: 86%

“…GSH capped gold nanoparticles confer a less negative zeta potential values compared with GNPs because they carry one net charge while GNP carries three net charges. In 2010, Liu et al [11] had studied the PL spectra of GSH capped CdTe/ZnS quantum dots. Heating of mixture solution of glutathione, Zn 2?…”

Section: Introductionmentioning

confidence: 99%

Effect of biocompatible glutathione capping on core–shell ZnS quantum dots

Singhal

Sharma

Kumar

2011

J Mater Sci: Mater Electron

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“…This result indicates the presence of cysteamine on the surface of QDs is covalently bound via -SH.The X-ray pattern of cysteamine-stabilized CdTe/ZnS(Fig. 1C)in the 10-60• 2θ range showed the characteristic zinc blend planes of111, 220, and at 24.94•, 41.72•, and 48.76• for CdTe/ZnS, respectively(Liu and Yu, 2010).Dynamic light scattering technique (DLS) was used to check the size distribution of the nanoparticles. The results of our studied showed that the QDs have a narrow size distribution of 3.0-4.0 nm(Fig.…”

mentioning

confidence: 84%

A simple and sensitive fluorimetric aptasensor for the ultrasensitive detection of arsenic(III) based on cysteamine stabilized CdTe/ZnS quantum dots aggregation

Ensafi

Kazemifard

Rezaei

2016

Biosensors and Bioelectronics

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“…3-Mercaptopropionic acid (MPA) capped CdTe/CdS QDs were synthesized via a modified reported method [8]. CdTe/CdS QDs were assembled on Au NPs/quartz substrate by layer-by-layer method [9].…”

Section: Methodsmentioning

confidence: 99%

Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles

Wang¹,

Xu²,

Zhang³

et al. 2016

Nano Online

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Au nanoparticles (Au NPs)/CdTe/CdS QDs nanocomposite films were fabricated by deposition of Au NPs and layer-by-layer self-assembly of colloidal CdTe/CdS QDs. Photoluminescence (PL) spectra showed that Au NPs incorporation resulted in an increase of PL intensity about 16-fold compared with that of the samples without Au NPs. PL enhancement of Au NPs/ CdTe/CdS QDs nanocomposite films can be controlled by tuning the thickness of spacer layer between the metal nanoparticles (MNPs) and QDs. Optical absorption spectra exhibited the incorporation of Au NPs boosted the absorption of Au NPs/CdTe/CdS QDs nanocomposite films. The results of finite-difference time-domain (FDTD) simulation indicated that the increased sizes of Au NPs resulted in stronger localization of electric field, which boosted the PL intensity of QDs in the vicinity of Au NPs. We thought that these were mainly attributed to localized SP enhancement effects of the Au NPs. Our experiment results demonstrated that Au NPs/QDs nanocomposite films would be a promising candidate for optoelectronic devices application. PACS 78. 82.33.Ln; 68.65.Hb

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In situ synthesis of highly luminescent glutathione-capped CdTe/ZnS quantum dots with biocompatibility

Cited by 109 publications

References 41 publications

Effect of biocompatible glutathione capping on core–shell ZnS quantum dots

Effect of biocompatible glutathione capping on core–shell ZnS quantum dots

A simple and sensitive fluorimetric aptasensor for the ultrasensitive detection of arsenic(III) based on cysteamine stabilized CdTe/ZnS quantum dots aggregation

Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles

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