Effect of chelating functional polymer on the size of CdS nanocluster formation

Wang, Cheng Chien; Chen, An-Liu; Chen, I-Han

doi:10.1016/j.jcis.2005.06.065

Cited by 14 publications

(8 citation statements)

References 18 publications

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“…2, the average diameter of the CdS nanoparticles increases by increasing the pH of the growth solution. This result is in agreement with the previous works showing that the more alkaline the solution, the bigger the size of CdS nanoparticles capped with either copolymers [18] or thioglycerol [19]. This effect, observed at high pH values, presumably implies that SH À groups on the surface of the colloidal particles are converted into S 2 À ions, which then bind excess Cd 2 + ions, possibly in the form of S 2 À -Cd 2 + -OH À structures [20].…”

Section: Resultssupporting

confidence: 94%

Photoluminescence of CdS nanoparticles embedded in a starch matrix

Rodríguez-Fragoso

Cruz

Tomás

et al. 2010

Journal of Luminescence

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Section: Resultssupporting

confidence: 94%

Photoluminescence of CdS nanoparticles embedded in a starch matrix

Rodríguez-Fragoso

Cruz

Tomás

et al. 2010

Journal of Luminescence

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“…The hybrid core/shell nanoparticles ZnS/CdS/chelating copolymer microbeads poly(methyl acrylates-co-methyl methacrylate-co-2-methylacrylic acid 3-(bis-carboxymethylamino)-2-hydroxy-propyl ester) is prepared successfully in this study. The hybrid shell/core ZnS/CdS/chelating copolymers have higher PL properties than that of the pristine hybrid shell/core CdS/chelating copolymers 15 due to ZnS passivation. The surface passivated by ZnS cannot only enhance the PL property, but also can prevent the harmfull Cd 2þ leakage as it is further applied in the bio-field.…”

Section: Introductionmentioning

confidence: 92%

“…The chelating copolymer, poly(methyl acrylates-co-2-methylacrylic acid 3-(bis-carboxymethylamino)-2-hydroxy-propyl ester), was also successful as a microsphere or membrane template to obtain the photoluminescence (PL) CdS nanocluster in previous studies. 6,[13][14][15] In fact, soft chemicals (organic compounds) cannot only act as the stability agent for nanoclusters, but also passivate the surface of the nanocluster and further influence their photo properties. 16 Consequently, what kinds of soft chemical are used to manufacture the quantum dots will seriously influence their luminescence property.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a highly luminescent nanocomposite by chelating copolymer

Wang

Chen

2006

Polymers for Advanced Techs

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Highly luminescent hybrid CdS (diameter ¼ 3-6 nm)/copolymer nanocomposites are prepared by using the soap-free emulsion polymerization with chemical precipitation methods in this investigation. The core/shell type of ZnS/CdS nanoparticle on the shell layer of the copolymer microsphere can be obtained via the ion-exchange method. The luminescent intensity and energy of the hybrid CdS/copolymer nanocomposite not only can be improved by increasing the pH value due to the surface passivated by the iminodiacetic acid sodium salt of the polymer side chain, but also can be enhanced by the higher band gap inorganic materials ZnS shell layer. In addition, the CdS nanoparticle passivated by inorganic shell ZnS is more robust than when organically passivation. Furthermore, these hybrid nanoparticles are easily employed to manufacture the transparent copolymer membrane at the film formation temperature (608C), and they still keep their high luminescent property.

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“…[4][5][6][7] Many NCs have been developed using protein, polymer, peptide, and DNA as capping/stabilizing agents. [8][9][10][11][12][13][14][15][16][17][18] The triblock co-polymers, P123 and F127 form hydrogel beyond a certain concentration of the polymer. [19][20][21][22] Small Angle Neutron Scattering (SANS) study reveals that these hydrogels are made up of immobilized spherical micelles of diameter 20 nm.…”

Section: Introductionmentioning

confidence: 99%

Probing Viscosity of Co‐Polymer Hydrogel and HeLa Cell Using Fluorescent Gold Nanoclusters: Fluorescence Correlation Spectroscopy and Anisotropy Decay

et al. 2020

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Fluorescence dynamics of gold nanoclusters (Au9 and Au25) are studied in the complex and crowded environment of a triblock co‐polymer (F127) hydrogel and inside cervical cancer cell, HeLa. In the hydrogel, spherical micelles of F127 remain immobilized with a hydrophobic core (PPO) and a hydrophilic corona (PEO) region. The fluorescence anisotropy decay suggests that the timescale of rotational relaxation in the hydrogel is similar to that in bulk water (viscosity ∼1 cP). From fluorescence correlation spectroscopy (FCS) it is inferred that the local viscosity in the hydrogel is 12 cP for Au9 and 18 cP for Au23. These results indicate that gold nanoclusters (AuNCs) localize in the corona region of the hydrogel. Evidently, frictions against rotation and translation are different inside the gel. It is suggested that rotation of the AuNCs senses the immediate water‐like “void” region while translation motion involves in‐and‐out movement of the AuNCs at the periphery of the gel. Finally, the gold nanoclusters are used for cell imaging and estimation of intracellular viscosity of HeLa cells.

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Effect of chelating functional polymer on the size of CdS nanocluster formation

Cited by 14 publications

References 18 publications

Photoluminescence of CdS nanoparticles embedded in a starch matrix

Photoluminescence of CdS nanoparticles embedded in a starch matrix

Preparation of a highly luminescent nanocomposite by chelating copolymer

Probing Viscosity of Co‐Polymer Hydrogel and HeLa Cell Using Fluorescent Gold Nanoclusters: Fluorescence Correlation Spectroscopy and Anisotropy Decay

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