Easily prepared high-quantum-yield CdS quantum dots in water using hyperbranched polyethylenimine as modifier

Mei, Jie; Yao, Junna; Wang, Lina; Liu, Weisheng

doi:10.1016/j.jcis.2007.10.027

Cited by 42 publications

(28 citation statements)

References 32 publications

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“…In addition, various polymers can also act as stabilizers as well as trapping agents for the modification surface states. In this context, Mao et al [18] has successfully enhanced the CdS quantum yield to nearly 100% using polyethylenimines (PEI) of different molecular weight in aqueous solution. The specific interaction between CdS and PEI is responsible for the enhancement of quantum yield.…”

Section: Introductionmentioning

confidence: 99%

Varying photoluminescence emission of CdS nanoparticles in aqueous medium: A comparative study on effect of surfactant structure

Kumar¹,

Mehta

2015

Nano-Structures & Nano-Objects

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Section: Introductionmentioning

confidence: 99%

Varying photoluminescence emission of CdS nanoparticles in aqueous medium: A comparative study on effect of surfactant structure

Kumar¹,

Mehta

2015

Nano-Structures & Nano-Objects

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“…Although not shown here, the size of the CdS NPs was estimated to be ~2.5 nm. 17,18 The NP emission spectrum is nearly symmetrical and broad in peak width while its excitation profile is broad and continuous, meaning that NPs can be efficiently excited at any wavelength shorter thañ 500 nm. Moreover, a FRET device is possible over a wide wavelength region from green to red.…”

Section: Resultsmentioning

confidence: 99%

“…Despite prevalent tri-n-octylphosphine oxide-based organic phase synthesis, 16 CdS NPs were also synthesized in an aqueous phase. 17 In this work, we study the FRET behavior of our CdS NPs that were synthesized in an aqueous solution with several commonly used fluorescence dyes. Due to their broad bandwidths, our CdS NPs appeared to work as an efficient donor to various fluorescence dye acceptors.…”

Section: Introductionmentioning

confidence: 99%

CdS Nanoparticles as Efficient Fluorescence Resonance Energy Transfer Donors for Various Organic Dyes in an Aqueous Solution

Ock¹,

Ganbold²,

Jeong³

et al. 2011

Bulletin of the Korean Chemical Society

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CdS nanoparticles (NPs) were synthesized in an aqueous phase in order to investigate their spectral behaviors as efficient fluorescence resonance energy transfer (FRET) donors for various organic dye acceptors. Our prepared CdS NPs exhibiting strong and broad emission spectra between 480-520 nm were able to transfer energy in a wide wavelength region from green to red fluorescence dyes. Rhodamine 6G (Rh6G), rhodamine B (RhB), and sulforhodamine 101 acid (Texas red) were tested as acceptors of the energy transfer from the CdS NPs. The three dyes and synthesized CdS NPs exhibited good FRET behaviors as acceptors and donors, respectively. Energy transfers from the CdS NPs and organic Cy3 dye were compared to the same acceptor Texas red dye at different concentrations. Our prepared CdS NPs appeared to exhibit better FRET behaviors comparable to those of the Cy3 dye. These CdS NPs in an aqueous solution may be efficient FRET donors for various organic dyes in a wide wavelength range between green and red colors.

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“…Recent efforts centered on tailored ligands to functionalize QDs include the utilization of (i) natural biomolecules such as DNA, 11 protein, 12 peptide, 13 biotin, 14 albumin, 15 collagen, 16 lysine, 17 serotonin, 18 dextran, 19 chitosan, 20 and cyclodextrin; 21 (ii) linear polymers including poly(methacrylic acid) 22 and poly(para-phenylene vinylene), 23 dendritic polymers such as poly(amidoamine), [24][25][26] poly(ethylenimine), 27 etc. ; and (iii) inorganic molecules such as silica, 28 siloxane 29 surfactant micelle.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence-enhanced CdTe quantum dots by hyperbranched poly(amidoamine)s functionalization

Shi

Wang

et al. 2013

J. Mater. Res.

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A new strategy using hyperbranched poly(amidoamine)s to functionalize CdTe quantum dots (QDs) has been described. Hyperbranched poly(amidoamine)s with amine terminals (HP-EDAMA1) were synthesized by one-pot polymerization via the coupled-monomer method and subsequently used to functionalize preformed CdTe QDs. Quite different from previous studies in which the photoluminescence of QDs was quenched by further functionalization with tailored ligands, the quantum yield of CdTe/HP-EDAMA1 nanocomposites was 2 times that of pure CdTe QDs without modification. With this versatile method, the photoluminescence quenching of QDs in the modification process by matrix materials can be effectively solved and new QDs/hyperbranched polymer nanocomposites with potential applications in biomedicine might be offered.

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Easily prepared high-quantum-yield CdS quantum dots in water using hyperbranched polyethylenimine as modifier

Cited by 42 publications

References 32 publications

Varying photoluminescence emission of CdS nanoparticles in aqueous medium: A comparative study on effect of surfactant structure

Varying photoluminescence emission of CdS nanoparticles in aqueous medium: A comparative study on effect of surfactant structure

CdS Nanoparticles as Efficient Fluorescence Resonance Energy Transfer Donors for Various Organic Dyes in an Aqueous Solution

Photoluminescence-enhanced CdTe quantum dots by hyperbranched poly(amidoamine)s functionalization

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