Copolymer nanosphere encapsulated CdS quantum dots prepared by RAFT copolymerization: synthesis, characterization and mechanism of formation

Das, Paramita; Zhong, Weiheng; Claverie, Jérôme P.

doi:10.1007/s00396-011-2466-0

Cited by 34 publications

(49 citation statements)

References 58 publications

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“…[166] RAFT-synthesized PAA (co)polymers as dispersants in preparing CdS quantum dot nanocomposites. [325] The use of the thiocarbonyl hetero-Diels Alder reaction to couple poly(iBA) (formed with 57) to cyclopentadienefunctional cellulose. [295] Polymer Networks Polymer networks can be formed by crosslinking RAFTsynthesized homopolymers, block copolymers, or star polymers, or can be formed directly by a RAFT (co)polymerization in the presence of crosslinking monomer (e.g.…”

Section: Grafting-to Processesmentioning

confidence: 99%

“…[321,322] MMA [323] MMA [324] AA [325] DMAm [326] (DMAm) [326] NIPAm [321] AA/St [327] NIPAm/ 361 [328] NIPAm/362 [328] MAA/ CHAm/NIPAm [328] MAA/BzAm/ NIPAm [328] MAA/OAm/ NIPAm [328] MAA/NIPAm/361 [328] AA/St-b-NVP [327] MAA/NIPAm/ 362 [328] MMA-b-(PEGMA/ NIPAm) [323] (NVP-b-MMA) [329,330] O I/M [285] St [285] BA [285] 81…”

mentioning

confidence: 99%

“…St [192] AA [207] AA/BA [325] AA/PEGA [207] St-bSt/413 [192] AA-b-PEGA [207] DMAm [442] DMAm-b-St [442] 157 S S S CO 2 H HO 2 C A* St [107] 158…”

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confidence: 99%

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Living Radical Polymerization by the RAFT Process – A Third Update

2012

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This paper provides a third update to the review of reversible deactivation radical polymerization (RDRP) achieved with thiocarbonylthio compounds (ZC(¼S)SR) by a mechanism of reversible addition-fragmentation chain transfer ( Chem. 2009Chem. , 62, 1402. This review cites over 700 publications that appeared during the period mid 2009 to early 2012 covering various aspects of RAFT polymerization which include reagent synthesis and properties, kinetics and mechanism of polymerization, novel polymer syntheses, and a diverse range of applications. This period has witnessed further significant developments, particularly in the areas of novel RAFT agents, techniques for end-group transformation, the production of micro/nanoparticles and modified surfaces, and biopolymer conjugates both for therapeutic and diagnostic applications.

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Section: Grafting-to Processesmentioning

confidence: 99%

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confidence: 99%

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Living Radical Polymerization by the RAFT Process – A Third Update

2012

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“…18,39,[43][44][45][46] As demonstrated in Scheme 1-a, the encapsulation of TiO 2 begins with the adsorption of a low molecular weight dispersant polymer (polyacrylic acid, PAA) prepared by RAFT polymerization. 42,[47][48][49] Colloidaly stable TiO 2 dispersions (c = 10 g·L -1 in water) are achieved by adsorbing the negatively charged PAA (c = 3 g·L -1 ) on the positively charged TiO 2 surface (Zetapotential: ~11 mV). 42,48 The second step is the in situ chain growth/encapsulation process on the TiO 2 surface via RAFT polymerization.…”

Section: In Situ Polymer Encapsulation-graphitization To Synthesize Tmentioning

confidence: 99%

TiO₂@Carbon Photocatalysts: The Effect of Carbon Thickness on Catalysis

Zhang

Vasei

Sang

et al. 2016

ACS Appl. Mater. Interfaces

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115

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Nanocomposites composed of TiO2 and carbon materials (C) are widely popular photocatalysts because they combine the advantages of TiO2 (good UV photocatalytic activity, low cost, and stability) to the enhanced charge carrier separation and lower charge transfer resistance brought by carbon. However, the presence of carbon can also be detrimental to the photocatalytic performance as it can block the passage of light and prevent the reactant from accessing the TiO2 surface. Here using a novel interfacial in situ polymer encapsulation-graphitization method, where a glucose-containing polymer was grown directly on the surface of the TiO2, we have prepared uniform TiO2@C core-shell structures. The thickness of the carbon shell can be precisely and easily tuned between 0.5 and 8 nm by simply programming the polymer growth on TiO2. The resulting core@shell TiO2@C nanostructures are not black and they possess the highest activity for the photodegradation of organic compounds when the carbon shell thickness is 1-2 nm, corresponding to ∼3-5 graphene layers. Photoluminescence and photocurrent generation tests further confirm the crucial contribution of the carbon shell on charge carrier separation and transport. This in situ polymeric encapsulation approach allows for the careful tuning of the thickness of graphite-like carbon, and it potentially constitutes a general and efficient route to prepare other oxide@C catalysts, which can therefore largely expand the applications of nanomaterials in catalysis.

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“…The size of QDs can be calculated from absorption edges using Henglein empirical curve, which relates the wavelength of the absorption threshold to the diameter of QDs. 81 In particular cases, FTIR spectroscopic measurements are also necessary. 82 Raman spectroscopy, as one of the best non-destructive techniques, can be employed for QDs characterization as well, since it allows to probe the active optical phonon modes and to explore the confined electronic structure of QDs.…”

Section: Qds As Alternative For Prion Detectionmentioning

confidence: 99%