Particle & Particle Systems Characterization

Cover image for Vol. 30 Issue 11

Special Issue: Remotely Controlled Colloids, Interfaces, and Biosystems

November 2013

Volume 30, Issue 11

Pages 913–995

  1. Cover Picture

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    4. Masthead
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    6. Editorials
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      Gold Nanoparticles: Multiresponsive Block Copolymer-Modified “Hairy” Gold Nanoparticles for Remote Control of Interfaces (Part. Part. Syst. Charact. 11/2013) (page 913)

      Yelu Shi, Victor Selin, Yuhao Wang and Svetlana A. Sukhishvili

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/ppsc.201370042

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      “Hairy” gold nanoparticles modified with block copolymers respond to light, changing their size and hydrophobicity via the photothermal effect. As Svetlana A. Sukhishvili and co-workers discuss on page 950, when these nanoparticles are adsorbed within a sub-monolayer at a solid surface, they support reversible changes in surface wettability in response to illumination by laser light.

  2. Inside Front Cover

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      Conjugated Polymers: Conjugated Polymer Nanoparticles with Ag+-Sensitive Fluorescence Emission: A New Insight into the Cooperative Recognition Mechanism (Part. Part. Syst. Charact. 11/2013) (page 914)

      Hui Yang, Chunhui Duan, Yishi Wu, Yi Lv, Heng Liu, Yanlin Lv, Debao Xiao, Fei Huang, Hongbing Fu and Zhiyuan Tian

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/ppsc.201370043

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      Ag+-sensitive fluorescence emission features of conjugated polymer nanoparticles are described by Zhiyuan Tian and co-workers on page 972. Among the emission features demonstrated are underlying cooperative recognition among the surface polymers on the nanoparticles, and aggregation-induced and Ag+-triggered dynamic quenching.

  3. Masthead

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      Masthead: (Part. Part. Syst. Charact. 11/2013)

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/ppsc.201370045

  4. Contents

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    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorials
    7. Reviews
    8. Communications
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  5. Editorials

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      Remotely Controlled Colloids, Interfaces, and Biosystems (pages 920–921)

      Gleb Sukhorukov, Igor Luzinov and Sergiy Minko

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/ppsc.201300321

  6. Reviews

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    1. Stimuli-Responsive Janus Particles (pages 922–930)

      Alla Synytska and Leonid Ionov

      Version of Record online: 10 JUL 2013 | DOI: 10.1002/ppsc.201300146

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      Stimuli-responsive Janus particles are colloidal particles that have different functionality at different sides and are sensitive to different signals such as temperature, pH, light, etc. Due to their dynamic behavior, stimuli-responsive Janus particles are able to spontaneously assemble/disassemble or change their shape by folding/bending, which depends on their shape and structure.

  7. Communications

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    1. In Situ Synthesis of Palladium Nanoparticles in Polymer Brushes Followed by QCM-D Coupled with Spectroscopic Ellipsometry (pages 931–935)

      Meike Koenig, Keith Brian Rodenhausen, Daniel Schmidt, Klaus-Jochen Eichhorn, Mathias Schubert, Manfred Stamm and Petra Uhlmann

      Version of Record online: 21 AUG 2013 | DOI: 10.1002/ppsc.201300155

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      The combinatorial method of quartz crystal microbalance coupled with spectroscopic ellipsometry can be used to follow the in situ synthesis of catalytically active palladium nanoparticles in polymer brushes in situ. By combining these two orthogonal techniques, it is possible to thoroughly characterize the thickness, composition, optical, and mechanical properties of nanoscopic thin films.

    2. A Facile Route Towards Inorganic Particles with Two Distinct Compartments Based on Electro-Hydrodynamic Co-Jetting (pages 936–939)

      Weipeng Lv, Kyung Jin Lee, Sangyeul Hwang, Tae-Hong Park, Fengbao Zhang and Joerg Lahann

      Version of Record online: 25 JUN 2013 | DOI: 10.1002/ppsc.201300123

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      Inorganic Janus particles are prepared by electro-hydrodynamic (EHD) co-jetting of mixtures of organic polymers and inorganic precursors and are converted into inorganic particles by thermal calcination. Using this approach, bicompartmental SiO2 particles with iron oxide nanocrystals selectively loaded into one hemisphere are created. Moreover, bicompartmental particles composed of TiO2 and SiO2 are fabricated by EHD co-jetting.

    3. Gold-Nanoparticle-Decorated Glass Microspheres (pages 940–944)

      Katarzyna M. Gadomska, Sebastian J. Lechner and Joachim P. Spatz

      Version of Record online: 9 SEP 2013 | DOI: 10.1002/ppsc.201300172

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      Patterning of microspheres with well-dispersed metallic nanoparticles (NPs) is a challenging task owing to NPs' high agglomeration potential. Here, a simple, three-step method is presented to decorate glass beads with gold nanoparticles arranged in a quasi-hexagonal manner. Such nano-modified particulate materials can later on serve as catalysts or precursors, i.e., carriers of gold nanoparticles for fabrication of complex polymer composites.

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      Paramagnetic, Near-Infrared Fluorescent Mn-Doped PbS Colloidal Nanocrystals (pages 945–949)

      Lyudmila Turyanska, Fabrizio Moro, Andrew N. Knott, Michael W. Fay, Tracey D. Bradshaw and Amalia Patanè

      Version of Record online: 3 SEP 2013 | DOI: 10.1002/ppsc.201300184

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      Mn-doped PbS colloidal nanocrystals in aqueous solution are paramagnetic and optically active in the technologically important biological window between 1.2 and 0.8 μm. Cytoxicity studies show that exposure of human cell lines to the nanoparticles at concentrations up to 0.2 mg mL−1 does not induce any adverse effect.

  8. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorials
    7. Reviews
    8. Communications
    9. Full Papers
    1. Multiresponsive Block Copolymer-Modified “Hairy” Gold Nanoparticles for Remote Control of Interfaces (pages 950–957)

      Yelu Shi, Victor Selin, Yuhao Wang and Svetlana A. Sukhishvili

      Version of Record online: 1 OCT 2013 | DOI: 10.1002/ppsc.201300220

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      Synthesis of hybrid “hairy” multiresponsive gold nanoparticles is achieved, and the application of these nanoparticles to control wettability of interfaces by changes in solution pH, temperature, or through illumination by laser light is demonstrated. The nanoparticles are prepared by grafting amphiphilic, dually responsive block copolymer from their surface using surface-initiated atom transfer radical polymerization (SI-ATRP).

    2. Alignment of Magnetic Nanorods in Solidifying Films (pages 958–963)

      Yu Gu and Konstantin G. Kornev

      Version of Record online: 10 OCT 2013 | DOI: 10.1002/ppsc.201300224

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      A theoretical study is presented of the ordering for an assembly of non-interacting magnetic nanorods suspended in a solidifying liquid film with exponentially increasing viscosity. As shown in the figure, one can control the effective magnetic moment of the solidified film by varying the ratio of relaxation times U0.

    3. Modulation of Interparticle Interactions and Specific Absorption Rate in Magnetomicelles through Changes in the Molecular Weight of the Hydrophobic Polymer Block (pages 964–971)

      Roberto Olayo-Valles and Carlos Rinaldi

      Version of Record online: 29 AUG 2013 | DOI: 10.1002/ppsc.201300157

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      Magnetomicelles are prepared by combining iron oxide nanoparticles with poly(ethylene glycol-b-caprolactone) (PEG-PCL) block copolymers. Magnetic measurements reveal that interparticle magnetic interactions and specific absorption rate are affected by PCL size. The results have implications for the use of magnetomicelles for magnetic fluid hyperthermia and magnetically actuated drug delivery.

    4. Conjugated Polymer Nanoparticles with Ag+-Sensitive Fluorescence Emission: A New Insight into the Cooperative Recognition Mechanism (pages 972–980)

      Hui Yang, Chunhui Duan, Yishi Wu, Yi Lv, Heng Liu, Yanlin Lv, Debao Xiao, Fei Huang, Hongbing Fu and Zhiyuan Tian

      Version of Record online: 1 OCT 2013 | DOI: 10.1002/ppsc.201300204

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      Fluorescent nanoparticles possessing Ag+-sensitive fluorescence emission features are fabricated from a series of polyfluorene-based conjugated polymers with 2,1,3-benzothiadiazole units incorporated into the backbone of polymer chains; a cooperative recognition-based mechanism and the combination of aggregation-induced fluorescence static quenching and Ag+-triggered fluorescence dynamic quenching for the observed Ag+-dependent fluorescence are confirmed.

    5. Preparation of Asymmetric Porous Janus Particles Using Microfluidics and Directional UV Curing (pages 981–988)

      Jiyeon Kim, Jin Joo and Soo-Young Park

      Version of Record online: 29 AUG 2013 | DOI: 10.1002/ppsc.201300194

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      Asymmetric porous Janus particles of poly(tripropylene glycol diacrylate) (poly(TPGDA)) are prepared from TPGDA/4-cyano-4′-pentylbiphenyl (5CB) mixtures using microfluidics and directional ultraviolet (UV) curing. Droplets of TPGDA/5CB are photo-polymerized in the off-chip reservoir with a focused UV beam irradiated from beneath the reservoir. This new method provides a simple and unique way of fabricating asymmetric porous Janus particles and functionalizing them with metal nanoparticles.

    6. Single-Component Diazo-resin Microcapsules for Encapsulation and Triggered Release of Small Molecules (pages 989–995)

      Qiangying Yi and Gleb B. Sukhorukov

      Version of Record online: 30 OCT 2013 | DOI: 10.1002/ppsc.201300246

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      Photo-responsive microcapsules based on a single type of polyelectrolyte diazo-resin are fabricated via LbL assembly. UV irradiation causes capsule shell sealing due to elimination of paired ionic charges (diazonium/diazo-sulfonate) and resulting hydrophobic shell structures. These sealed capsules demonstrate excellent ability for small molecule encapsulation, as proven by successful RhB entrapment in capsule cavities.

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