Particle & Particle Systems Characterization

Cover image for Vol. 30 Issue 6

June 2013

Volume 30, Issue 6

Pages 483–564

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      Fluorescent Probes: Nano-Ruby: A Promising Fluorescent Probe for Background-Free Cellular Imaging (Part. Part. Syst. Charact. 6/2013) (page 483)

      Andrew M. Edmonds, Mushtaq A. Sobhan, Varun K. A. Sreenivasan, Ekaterina A. Grebenik, James R. Rabeau, Ewa M. Goldys and Andrei V. Zvyagin

      Version of Record online: 19 JUN 2013 | DOI: 10.1002/ppsc.201370022

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      Public imagination will be captured by this novel application of ruby, a common gemstone, now attracting the excitement of frontier, crossdisciplinary nanoscience. In this issue Andrei V. Zvyagin and co-workers report on page 506 that ruby has been carved into nanoparticles by femtosecond laser ablation allowing harnessing truly special qualities of ruby at the nanoscale for which the name “nano-ruby” was coined. This cover illustrates background-free biological imaging using nano-rubies as labels.

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      Hydrogels: Liposomal Templating, Association with Mammalian Cells, and Cytotoxicity of Poly(vinyl alcohol) Physical Hydrogel Nanoparticles (Part. Part. Syst. Charact. 6/2013) (page 566)

      Sidsel Ø. Andreasen, Siow-Feng Chong, Mille B. L. Kryger, Bettina E. B. Jensen, Almar Postma, Marie-Helene Alves, Brigitte Städler, Kenneth N. Goldie and Alexander N. Zelikin

      Version of Record online: 19 JUN 2013 | DOI: 10.1002/ppsc.201370025

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      Hydrogel nanoparticles based on physically crosslinked poly(vinyl alcohol) are obtained via a combination of liposomal templating technique to produce polymer nanoparticles and subsequent non-cryogenic polymer hydrogelation in aqueousisopropanol as described by Alexander N. Zelikin and co-workers on page 514. Pristine colloidal hydrogels are stealth-like whereas co-gelation with collagen affords hydrogel nano particles with controlled association with mammalian cells for diverse biomedical applications.

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  4. Contents

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  5. Communications

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    1. Novel Catalysts of Au/SiO2 Hybrid Nanorod Arrays for the Direct Formation of Hydrogen Peroxide (pages 489–493)

      Aihua Chen, Qingjun Zhu, Yongbin Zhao, Takashi Tastumi and Tomokazu Iyoda

      Version of Record online: 15 MAR 2013 | DOI: 10.1002/ppsc.201300012

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      A simple and efficient method for fabricating self-standing Au/SiO2 hybrid nanorod arrays is demonstrated. Highly dispersed uniform Au NPs are immobilized on SiO2 nanorod arrays and show high catalytic activity for the direct formation of H2O2 from H2 and O2.

    2. Fabrication of pH-Tunable Calcium Phosphate Nanocapsules via Dendrimer-Templated Assembly for Intracellular Lysosomal Release of Drugs (pages 494–500)

      Jayant J. Khandare, Archana Jalota-Badhwar, Neetika Taneja, Russel R. Mascarenhas, Karan Vadodaria, Khushbu R. Zope and Shashwat S. Banerjee

      Version of Record online: 22 MAR 2013 | DOI: 10.1002/ppsc.201300034

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      A pH-responsive dendrimer templated polymer-calcium phosphate core shell nanostructure is developed. Upon exposure to cellular lysosomal pH, a guest anticancer drug is released from the nanocapsule by dissolution of the CaP shell. Such a stimuli responsive carrier enables on-demand controlled release of drugs in acidic organelles.

    3. Colloidal Synthesis and Size-Related Capacitance of Small Cobalt Sulfide Nanocrystals (pages 501–505)

      Xintao Luo, Xuefei Li, Hao Zhang and Bai Yang

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ppsc.201300037

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      The capacitance of CoS material is greatly enhanced to 790 F g−1 by synthesizing small and solution-dispersible nanocrystals (NCs) in high-boiling-point organic solvent. The results also indicate that the capacitance does not monotonously increase with the decrease of CoS size, but is reduced for ultrasmall NCs due to the resistance from ligand capping.

  6. Full Papers

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Communications
    7. Full Papers
    1. Nano-Ruby: A Promising Fluorescent Probe for Background-Free Cellular Imaging (pages 506–513)

      Andrew M. Edmonds, Mushtaq A. Sobhan, Varun K. A. Sreenivasan, Ekaterina A. Grebenik, James R. Rabeau, Ewa M. Goldys and Andrei V. Zvyagin

      Version of Record online: 27 FEB 2013 | DOI: 10.1002/ppsc.201200112

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      Bioprobes based on fluorescent ruby nanoparticles that are suitable for ultrasensitive imaging are produced by femtosecond laser ablation of bulk ruby. A stable aqueous/buffer colloid, permitting facile conjugation to proteins, arises and the nanoparticles are photostable, with long lifetime emission. With time-gating complete suppression of cell autofluorescence and exogenous fluorophores is observed.

    2. Liposomal Templating, Association with Mammalian Cells, and Cytotoxicity of Poly(vinyl alcohol) Physical Hydrogel Nanoparticles (pages 514–522)

      Sidsel Ø. Andreasen, Siow-Feng Chong, Mille B. L. Kryger, Bettina E. B. Jensen, Almar Postma, Marie-Helene Alves, Brigitte Städler, Kenneth N. Goldie and Alexander N. Zelikin

      Version of Record online: 8 MAR 2013 | DOI: 10.1002/ppsc.201200134

      Thumbnail image of graphical abstract

      Polymer nanoparticles based on poly(vinyl alcohol) are obtained via a liposomal templating technique and subsequent physical gelation affords the hydrogels with stealth-like properties. Controlled association of hydrogels with mammalian cells is achieved through co-gelation with collagen. The resulting hydrogels exhibit minor cytotoxicity and are attractive for biomedical applications.

    3. Size-Dependent Structural and Optical Characteristics of Glucose-Derived Graphene Quantum Dots (pages 523–531)

      Libin Tang, Rongbin Ji, Xueming Li, Kar Seng Teng and Shu Ping Lau

      Version of Record online: 15 MAR 2013 | DOI: 10.1002/ppsc.201200131

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      Monodispersed graphene quantum dots (GQDs) with controllable diameters of less than 5 nm are prepared and studied. The low-loss electron energy loss spectroscopy (EELS) plasmon excitations of the GQDs with various sizes are determined for the first time and the energy band diagram of the GQD is proposed.

    4. A Soft Chemistry Route to Selective Nickel-Based Nanocatalysts with Faceted Morphologies (pages 532–541)

      Julie Aguilhon, Cécile Thomazeau, Cédric Boissière, Olivier Durupthy and Clément Sanchez

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ppsc.201300023

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      A one pot synthesis of alumina-supported faceted nickel nanoparticles is reported that uses a simple, inexpensive, and sustainable pathway. The positive impact of halogen on the nickel faceting and on the selectivity gain for a refearence hydrogenation catalytic reaction is demonstrated. This is of particular interest for a better understanding of the key parameters for selectivity in catalysis.

    5. Synthesis and Characterization of Pressure and Temperature Dual-Responsive Polystyrene Microbeads (pages 542–548)

      Cun Zhu, Rui Deng, Jie Zeng, Gamal E. Khalil, Dana Dabiri, Zhongze Gu and Younan Xia

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ppsc.201300024

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      A facile approach to the synthesis of pressure and temperature dual-responsive polystyrene (PS) microbeads with controlled sizes via dispersion polymerization is described. Three different luminophors are directly introduced into the reaction system and thus incorporated into the resultant PS microbeads during polymerization. The PS beads loaded with multiple luminophors have the ability to serve as building blocks for the fabrication of novel sensing and imaging devices.

    6. Component-Controlled Synthesis of Small-Sized Pd-Ag Bimetallic Alloy Nanocrystals and Their Application in a Non-Enzymatic Glucose Biosensor (pages 549–556)

      Suli Liu, Can Zhang, Lin Yuan, Jianchun Bao, Wenwen Tu, Min Han and Zhihui Dai

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ppsc.201200150

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      Small-sized Pd-Ag alloy nanocrystals with high crystallinity and well-controlled components, including Pd5Ag, Pd2Ag, PdAg, PdAg2 and PdAg5, are synthesized via a solid-liquid and solid-solid transformation reaction. Pd2Ag nanocrystals possess unique structure and electronic properties, exhibiting greatly enhanced electrocatalytic activity toward oxidation of glucose and a novel ultrasensitive non-enzymatic glucose biosensor is fabricated.

    7. Microwave-Assisted One-Pot Synthesis of Metal-Free Nitrogen and Phosphorus Dual-Doped Nanocarbon for Electrocatalysis and Cell Imaging (pages 557–564)

      K. Sudhakara Prasad, Ramjee Pallela, Dong-Min Kim and Yoon-Bo Shim

      Version of Record online: 20 MAR 2013 | DOI: 10.1002/ppsc.201300020

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      Simple synthesis of nitrogen and phosphorus dual-doped nanocarbon is carried out using a microwave-assisted process. The as-obtained nanocarbon exhibits fluorescence and electrocatalytical activity.

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