Size Control of Nanoparticles in Semiconductor-Polymer Composites. 2. Control via Sizes of Spherical Ionic Microdomains in Styrene-Based Diblock Ionomers

Moffitt, Matthew G.; McMahon, Lynne; Pessel, Valerie; Eisenberg, Adi

doi:10.1021/cm00054a018

Cited by 263 publications

(224 citation statements)

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“…Precipitation, redispersion, or heating (below the glass transition temperature, T g ) does not affect the size distribution of the nanocolloids. [178,180,183] Cohen and coworkers noted the possibility of increasing the size of the nanocolloids by addition of solvents such as pyridine or picoline, which act as coordinating ligands to the inorganic particles. [183] A similar effect was recently observed by Wozniak et al [185] in their attempts to synthesize CdS clusters within homopolymers of PVP.…”

Section: Limit Of High Supersaturationmentioning

confidence: 99%

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Amphiphilic Block Copolymers in Structure-Controlled Nanomaterial Hybrids

Förster¹,

1998

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Amphiphilic block copolymers (ABCs) are important in interface and particle stabilization. Following consideration of the various methods of synthesis of ABCs, mesophases and micelles of block copolymers and the solubilization and adhesion of ABCs are considered. The Figure shows micelles formed by a polystyrene‐poly(vinylpyridine) copolymer. Nanoparticles and ABC/nanoparticle hybrid systems are also reviewed.

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Section: Limit Of High Supersaturationmentioning

confidence: 99%

“…Eisenberg and coworkers used this method to increase the size of CdS colloids. [178] Yue and Cohen prepared (ZnCd)S 2 colloids by multiple loading experiments. [180] The carboxylic acid coordination sites are regenerated and can be reused to make onion-type binary clusters.…”

Section: Repeated Loadingmentioning

confidence: 99%

Amphiphilic Block Copolymers in Structure-Controlled Nanomaterial Hybrids

Förster¹,

1998

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“…However, homopolymers do not possess any nanostructure and show a restricted ability of particles' stabilization [10]. The amphiphilic block copolymers are known to form micelles and can provide enhanced control over metal particles' nucleation and growth [11].…”

Section: Introductionmentioning

confidence: 99%

Palladium nanoparticles stabilized in block-copolymer micelles for highly selective 2-butyne-1,4-diol partial hydrogenation

Semagina

Joannet

Parra

et al. 2005

Applied Catalysis A: General

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Pd nanoparticles (2 nm) stabilized in the micelle core of poly(ethylene oxide)-block-poly-2-vinylpyridine were studied in 2-butyne-1,4-diol partial hydrogenation. Both unsupported micelles (0.6 kg Pd /m 3 ) and supported ones on g-Al 2 O 3 (0.042 wt.% Pd) showed nearly 100% selectivity to 2-butene-1,4-diol up to 94% conversion. The only side product observed was 2-butane-1,4-diol. The catalysis was ascribed to Pd nanoparticles' surface modified by pyridine units of micelles and alkali reaction medium (pH of 13.4). TOFs over the unsupported and supported catalysts were found to be 0.56 and 0.91 s À1 (at 323 K, 0.6 MPa H 2 pressure, solvent 2-propanol/water = 7:3), respectively. Reaction kinetics fit the Langmuir-Hinshelwood model assuming weak hydrogen adsorption. The experiments on the catalyst reuse showed that Pd nanoparticles remain inside the micelle core, but the micelles slightly desorbed (less then 5%) during the catalytic run. #

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“…One such associative structure is the RM (Riess 2003). Advantages of the PS-PAA RM system include low critical micelle concentrations (Moffitt et al 1996), a characterized water-solvent solubility equilibria (Gao et al 1992), and some understanding of the scaling relationships between the size of the ionic blocks and metal ions for the formation of metal nanoparticles (Moffitt et al 1995;Bronstein et al 1999;Hamley 2003;Wang and Moffitt 2004).…”

Section: Resultsmentioning

confidence: 99%

Generation of fluorescent silver nanoclusters in reverse micelles using gamma irradiation: low vs. high dosages and spectral evolution with time

et al. 2014

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Reverse micelles (RMs) containing aqueous solutions of Ag ? ions in their core produce fluorescent Ag nanoclusters (NCs), upon exposure to gamma irradiation. The fluorescence spectra of the NCs evolve over days to weeks after the exposure, and usually show large increases in intensity. Responses of as high as 2.8 9 10 4 CPS/Gy were reached. A dosage as low as 0.5 Gy (10 % of the lethal dosage for humans) produces NCs having fluorescence intensities higher than background. The RMs can be employed in novel gamma radiation detectors with appearance of fluorescence indicating that radiation was once present. In applications involving detection and tracking of fissile materials, the evolution of the fluorescence spectra over time may provide additional information about the radiation source. A two-phase liquid system is used for RM formation in a simple procedure. It is likely that this synthesis method may be adapted to produce NCs from other metal ions.

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Size Control of Nanoparticles in Semiconductor-Polymer Composites. 2. Control via Sizes of Spherical Ionic Microdomains in Styrene-Based Diblock Ionomers

Cited by 263 publications

References 0 publications

Amphiphilic Block Copolymers in Structure-Controlled Nanomaterial Hybrids

Amphiphilic Block Copolymers in Structure-Controlled Nanomaterial Hybrids

Palladium nanoparticles stabilized in block-copolymer micelles for highly selective 2-butyne-1,4-diol partial hydrogenation

Generation of fluorescent silver nanoclusters in reverse micelles using gamma irradiation: low vs. high dosages and spectral evolution with time

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