Control of the catalytic properties and directed assembly on surfaces of MADIX/RAFT polymer-coated gold nanoparticles by tuning polymeric shell charge

Beija, Mariana; Palleau, Etienne; Sistach, Stéphanie; Zhao, Xuange; Ressier, Laurence; Mingotaud, Christophe; Destarac, Mathias; Marty, Jean‐Daniel

doi:10.1039/c0jm01781g

Cited by 38 publications

(49 citation statements)

References 31 publications

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“…A* (CMS) [336] (AA) [499] BA [500,501] NIPAm [499] TMAPAm [499] (DMAm) [494] VAc [494,502,503] VBz [503] VPv [503] NES [290] BES [290] VF2 [504] NVC [290] NVCL [505] NVP [506,507] VPA [506,508] (DADMAC) [113,506] (AA/iBoA) [509] (AA-b-iBoA) [509] VF2/PMVE [504] DMAm-b-VAc [494] (PDMAm-b-VF2) [504] VAc-b-VBz [503] (VAc-b-VPv) [503] VBz-bVAc [503] VBz-b-VPv [503] VPv-b-VAc [503] (VPv-bVBz) [503] NVC-b-NES [290] AA-b-VPA [508] (Am-b-DADMAC) [113] (AA-b-DADMAC) [506] 228…”

Section: O S S Cnmentioning

confidence: 99%

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: O S S Cnmentioning

confidence: 99%

Living Radical Polymerization by the RAFT Process – A Third Update

2012

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“…In solution, PAA has good solubility at high pH values; however, it has poor solubility and even collapses, entangling together to precipitate from solution at low pH values (pH<4) in its acidic form. Although PAA has been extensively used to stabilize Au NPs, its pH-induced properties have not been thoroughly investigated [3]. When a PAA polymer layer is physically or chemically attached to the gold NP surface, not only a steric stability is acquired but also the properties of the Au NPs can be controlled to some extent in response to one of these small changes in the environmental parameters like pH.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, PAA with a low molecular weight was synthesized by RAFT/MADIX polymerization mediated by the O -ethyl-S -(1-methoxycarbonyl)ethyl dithiocarbonate MADIX agent (Rhodixan A1). The conditions of reactions were chosen so that the targeted M n was 10,000 g mol −1 [3].…”

Section: Resultsmentioning

confidence: 99%

“…Hence, we have previously demonstrated that gold NPs covered with anionic or catanionic compounds can be selectively deposited on simple or complex pattern, bearing the opposite charge using AFM nanoxerography [3,23]. We aim here to demonstrate and understand in which extent deposition of nanohybrids can be controlled by finely tuning the nanohybrid charge.…”

Section: Introductionmentioning

confidence: 99%

“…This could be taken in good account in an increasing number of applications. For instance, catalytic activity of nanohybrids dispersed in solution can be controlled by applying such a stimulus in order to induce either a change in the organic shell diffusion properties of the nanohybrids or a reversible aggregation useful for the recovering of the catalyst [3]. In biological applications, external stimuli allowed for instance the control of drug delivery for small drugs encapsulated inside those nanohybrids [1].…”

Section: Introductionmentioning

confidence: 99%

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Stimuli-responsive gold nanohybrids: chemical synthesis and electrostatic directed assembly on surfaces by AFM nanoxerography

et al. 2013

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Stimuli-responsive nanohybrids based on gold nanoparticles coated with poly(acrylic acid) were synthesized. Their intrinsic properties (i.e., zeta potential and hydrodynamic diameter) were easily adjusted through the control of pH. This allows modulating the intensity of the electrophoretic forces exerted by charge patterns on the nanohybrids during the development step in AFM nanoxerography and controlling the directed assembly of nanohybrids onto charged patterns.

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Gold Nanorods with Phase‐Changing Polymer Corona for Remotely Near‐Infrared‐Triggered Drug Release

Liu

Detrembleur

Grignard

et al. 2013

Chemistry An Asian Journal

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Herein, we report a new drug-delivery system (DDS) that is comprised of a near-infrared (NIR)-light-sensitive gold-nanorod (GNR) core and a phase-changing poly(ε-caprolactone)-b-poly(ethylene glycol) polymer corona (GNR@PCL-b-PEG). The underlying mechanism of the drug-loading and triggered-release behaviors involves the entrapment of drug payloads among the PCL crystallites and a heat-induced phase change, respectively. A low premature release of the pre-loaded doxorubicin was observed in PBS buffer (pH 7.4) at 37 °C (<10% of the entire payload after 48 h). However, release could be activated within 30 min by conventional heating at 50 °C, above the Tm of the crystalline PCL domain (43.5 °C), with about 60% release over the subsequent 42 h at 37 °C. The NIR-induced heating of an aqueous suspension of GNR@PCL-b-PEG under NIR irradiation (802 nm) was investigated in terms of the irradiation period, power, and concentration-dependent heating behavior, as well as the NIR-induced shape-transformation of the GNR cores. Remotely NIR-triggered release was also explored upon NIR irradiation for 30 min and about 70% release was achieved in the following 42 h at 37 °C, with a mild warming (<4 °C) of the surroundings. The cytotoxicity of GNR@PCL-b-PEG against the mouse fibroblastic-like L929 cell-line was assessed by MTS assay and good compatibility was confirmed with a cell viability of over 90% after incubation for 72 h. The cellular uptake of GNR@PCL-b-PEG by melanoma MEL-5 cells was also confirmed, with an averaged uptake of 1250(±110) particles cell(-1) after incubation for 12 h (50 μg mL(-1)). This GNR@PCL-b-PEG DDS is aimed at addressing the different requirements for therapeutic treatments and is envisaged to provide new insights into DDS targeting for remotely triggered release by NIR activation.

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Control of the catalytic properties and directed assembly on surfaces of MADIX/RAFT polymer-coated gold nanoparticles by tuning polymeric shell charge

Cited by 38 publications

References 31 publications

Living Radical Polymerization by the RAFT Process – A Third Update

Living Radical Polymerization by the RAFT Process – A Third Update

Stimuli-responsive gold nanohybrids: chemical synthesis and electrostatic directed assembly on surfaces by AFM nanoxerography

Gold Nanorods with Phase‐Changing Polymer Corona for Remotely Near‐Infrared‐Triggered Drug Release

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