Controllable synthesis and cell-imaging studies on CdTe quantum dots together capped by glutathione and thioglycolic acid

Tian, Jianniao; Liu, Rongjun; Zhao, Yi; Qing, XU; Zhao, Shulin

doi:10.1016/j.jcis.2009.04.064

Cited by 77 publications

(28 citation statements)

References 24 publications

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“…In order to produce water-soluble ultrasmall cadmium chalcogenide NPs typically either sulfur-containing stabilizers are used such as cysteine (Xia and Zhu 2008;Park et al 2010Park et al , 2011Zhou et al 2011;Pennycook et al 2012) or mercaptocarbonic acids (Rogach et al 2007;Xiao et al 2008;Chen et al 2008;Tian et al 2009;Kalasad et al 2009;Zhou et al 2011) or amine-rich dendrimers (Wu et al 2005;Fahmi et al 2009) forming strong complexes with Cd atoms on the NP surface.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and luminescent properties of ultrasmall colloidal CdS nanoparticles stabilized by Cd(II) complexes with ammonia and mercaptoacetate

et al. 2014

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The synthesis of stable water-soluble ultrasmall 1.8 nm CdS nanoparticles co-stabilized with Cd(II) complexes with NH 3 and mercaptoacetate ions is reported. The CdS nanoparticles emit broadband photoluminescence with a peak at 2.3 eV and a quantum yield of up to 15 %. The photoluminescence decay is strongly non-exponential and characterized by an average radiative life-time increasing from 46 to 105 ns as the emission quantum energy decreases from 2.9 to 1.8 eV. The photoluminescence intensity and life-time decrease to about 50 % as the colloid temperature is elevated from 22 to 50°C. This behavior is completely reversible and assumed to originate from the thermally activated dissociation of Cd(II)-NH 3 complexes on the nanoparticle surface and the formation of Cd(II)-H 2 O complexes acting as the radiationless recombination sites. The strong temperature dependence of the luminescent properties coupled with the small size and reasonably high quantum yields of emission makes CdS nanoparticles co-stabilized with NH 3 and mercaptoacetate attractive for bio-imaging, bio-sensing, and other applications.

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Section: Introductionmentioning

confidence: 99%

Synthesis and luminescent properties of ultrasmall colloidal CdS nanoparticles stabilized by Cd(II) complexes with ammonia and mercaptoacetate

et al. 2014

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“…[80][81][82] Carboxylated CdTe QD nanocrystals were synthesized in our laboratory (see Figures S8-S10, Supporting Information) using a water phase route in the presence of surface stabilizers. Particles showed spherical shape, 4.28 ± 1.94 (mean ± standard deviation) diameter, light absorption from UV to visible, and a single fl uorescence peak centered at 660 nm (see Figure S11 in the Supporting Information).…”

Section: Qds Immobilizationmentioning

confidence: 99%

On‐the‐Spot Immobilization of Quantum Dots, Graphene Oxide, and Proteins via Hydrophobins

Gravagnuolo

Morales‐Narváez

Matos

et al. 2015

Adv Funct Materials

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Class I hydrophobin Vmh2, a peculiar surface active and versatile fungal\ud protein, is known to self-assemble into chemically stable amphiphilic fi lms,\ud to be able to change wettability of surfaces, and to strongly adsorb other\ud proteins. Herein, a fast, highly homogeneous and effi cient glass functionalization\ud by spontaneous self-assembling of Vmh2 at liquid–solid interfaces is\ud achieved (in 2 min). The Vmh2-coated glass slides are proven to immobilize\ud not only proteins but also nanomaterials such as graphene oxide (GO) and\ud quantum dots (QDs). As models, bovine serum albumin labeled with Alexa\ud 555 fl uorophore, anti-immunoglobulin G antibodies, and cadmium telluride\ud QDs are patterned in a microarray fashion in order to demonstrate functionality,\ud reproducibility, and versatility of the proposed substrate. Additionally, a\ud GO layer is effectively and homogeneously self-assembled onto the studied\ud functionalized surface. This approach offers a quick and simple alternative to\ud immobilize nanomaterials and proteins, which is appealing for new bioanalytical\ud and nanobioenabled applications

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“…For example, Yan et al reported the fabrication of CdTe QDs with 70% QY in the presence of both GSH and Cys as capping agents [55]. Tian et al describes the preparation of CdTe QDs in aqueous solution using both GSH and TGA [56]. By tailoring the concentration of both GSH and TGA surfactants in the reaction mixture, the QY of the CdTe QDs was increased to as high as 63% without extra processing steps such as etching with hydrofluoric acid.…”

Section: Preparation Of Cdte Quantum Dots In the Aqueous Phasementioning

confidence: 99%

Aqueous phase synthesis of CdTe quantum dots for biophotonics

Yong

Law

Roy

et al. 2010

Journal of Biophotonics

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Over the past few years, CdTe quantum dots have been demonstrated as powerful probes for biophotonics applications. The aqueous phase synthesis technique remains the best approach to make high quality CdTe QDs in a single‐pot process. CdTe QDs prepared directly in the aqueous phase can have quantum yield as high as 80%. In addition, the surface of CdTe QDs prepared using the aqueous phase technique is functionalized with reactive groups that enable them to be directly conjugated with specific ligands for targeted delivery and sensing. In this contribution, we review recent progress in fabricating aqueous CdTe QDs and exploiting their optical properties in novel approaches to biomedical imaging and sensing applications. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Controllable synthesis and cell-imaging studies on CdTe quantum dots together capped by glutathione and thioglycolic acid

Cited by 77 publications

References 24 publications

Synthesis and luminescent properties of ultrasmall colloidal CdS nanoparticles stabilized by Cd(II) complexes with ammonia and mercaptoacetate

Synthesis and luminescent properties of ultrasmall colloidal CdS nanoparticles stabilized by Cd(II) complexes with ammonia and mercaptoacetate

On‐the‐Spot Immobilization of Quantum Dots, Graphene Oxide, and Proteins via Hydrophobins

Aqueous phase synthesis of CdTe quantum dots for biophotonics

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