Advanced Materials

Cover image for Vol. 26 Issue 15

April 16, 2014

Volume 26, Issue 15

Pages 2285–2445

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. You have free access to this content
      Liquid-Crystalline Elastomers: High-Resolution 3D Direct Laser Writing for Liquid-Crystalline Elastomer Microstructures (Adv. Mater. 15/2014) (page 2285)

      Hao Zeng, Daniele Martella, Piotr Wasylczyk, Giacomo Cerretti, Jean-Christophe Gomez Lavocat, Chih-Hua Ho, Camilla Parmeggiani and Diederik Sybolt Wiersma

      Version of Record online: 11 APR 2014 | DOI: 10.1002/adma.201470095

      Thumbnail image of graphical abstract

      Liquid-crystalline elastomers (LCEs) are great candidates for smart artificial materials. On page 2319, D. S. Wiersma, C. Parmeggiani, and co-workers use direct laser writing to fabricate 3D LCE structures with sub-micrometer resolution and maintaining the designed molecular orientation. This technique opens up the road towards 3D microphotonics in elastomers, and lays the basis for creating 3D, micrometer-size robotic structures, which can be controlled by light.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. You have free access to this content
      Microfluidic Chips: Active Digital Microfluidic Paper Chips with Inkjet-Printed Patterned Electrodes (Adv. Mater. 15/2014) (page 2286)

      Hyojin Ko, Jumi Lee, Yongjun Kim, Byeongno Lee, Chan-Hee Jung, Jae-Hak Choi, Oh-Sun Kwon and Kwanwoo Shin

      Version of Record online: 11 APR 2014 | DOI: 10.1002/adma.201470096

      Thumbnail image of graphical abstract

      Active, paper-based, microfluidic chips driven by electrowetting are fabricated and demonstrated for reagent transport and mixing by K. Shin, O.-S. Kwon, and co-workers on page 2335. The key advantage in fabricating the paper-based microfluidic chips is that electrode patterns can be designed and printed on paper quickly, finely, and precisely without complicated wet-lab processes. The cover image showes that the inkjet-printed patterned electrodes can be employed to actuate liquid drops on paper, not only photo paper, but virtually any paper, such as recycled magazine paper.

  3. Inside Back Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. You have free access to this content
      Organic Electronics: Bulk Interpenetration Network of Thermoelectric Polymer in Insulating Supporting Matrix (Adv. Mater. 15/2014) (page 2447)

      Guanghao Lu, Laju Bu, Sijun Li and Xiaoniu Yang

      Version of Record online: 11 APR 2014 | DOI: 10.1002/adma.201470100

      Thumbnail image of graphical abstract

      On Page 2359, X. Yang, G. Lu, and co-workers introduce a method to improve the thermoelectric properties of polymers, upon constructing an interpenetrating network of a thermoelectric polymer within an insulating polymer matrix. The local one-dimensional charge transport along the conductive network simultaneously leads to lower thermal conductivity and higher electrical conductivity without sacrificing the Seebeck coefficient. This work promotes a conjugated-/insulating-polymer blend towards its application in all-polymer artificial skin and temperature sensors.

  4. Back Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. You have free access to this content
      Photonic Crystals: Two-Dimensional Programmable Manipulation of Magnetic Nanoparticles on-Chip (Adv. Mater. 15/2014) (page 2448)

      Anandakumar Sarella, Andrea Torti, Marco Donolato, Matteo Pancaldi and Paolo Vavassori

      Version of Record online: 11 APR 2014 | DOI: 10.1002/adma.201470101

      Thumbnail image of graphical abstract

      P. Vavassori and co-workers demonstrate on page 2384 that field-controlled displacement of magnetic domain walls in ferromagnetic nano-ring structures allows for capture and 2-dimensional remote manipulation of fluidborne magnetic nanoparticles over a chip surface.

  5. Masthead

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. You have free access to this content
      Masthead: (Adv. Mater. 15/2014)

      Version of Record online: 11 APR 2014 | DOI: 10.1002/adma.201470098

  6. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. You have free access to this content
  7. Progress Reports

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. Application and Future Challenges of Functional Nanocarbon Hybrids (pages 2295–2318)

      Cameron J. Shearer, Alexey Cherevan and Dominik Eder

      Version of Record online: 22 FEB 2014 | DOI: 10.1002/adma.201305254

      Thumbnail image of graphical abstract

      Nanocarbon hybrids are a class of material in which a nanocarbon (e.g., carbon nanotube, graphene) is in close contact with a second active component. Hybrids prepared by a range of synthesis strategies excel in a variety of energy and environmental applications such as catalysis, energy storage, energy conversion and sensors.

  8. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. High-Resolution 3D Direct Laser Writing for Liquid-Crystalline Elastomer Microstructures (pages 2319–2322)

      Hao Zeng, Daniele Martella, Piotr Wasylczyk, Giacomo Cerretti, Jean-Christophe Gomez Lavocat, Chih-Hua Ho, Camilla Parmeggiani and Diederik Sybolt Wiersma

      Version of Record online: 13 JAN 2014 | DOI: 10.1002/adma.201305008

      Thumbnail image of graphical abstract

      The paper describes 3D structures made of liquid-crystalline elastomer (LCE) – rings, woodpiles, etc. – fabricated by two-photon absorption direct laser writing with sub-micrometer resolution while maintaining the desired molecular orientation. These results lay the foundations for creating 3D, micrometer-sized, light-controlled LCE structures.

    2. Tunable Mesoporous Bilayer Photonic Resins with Chiral Nematic Structures and Actuator Properties (pages 2323–2328)

      Mostofa K. Khan, Wadood Y. Hamad and Mark J. MacLachlan

      Version of Record online: 20 JAN 2014 | DOI: 10.1002/adma.201304966

      Thumbnail image of graphical abstract

      Chiral nematic structures with different helical pitch from layer to layer are embedded into phenol-formaldehyde bilayer resin composite films using cellulose nanocrystals (CNCs) as templates. Selective removal of CNCs results in mesoporous resins with different pore size and helical pitch between the layers. Consequently, these materials exhibit photonic properties by selectively reflecting lights of two different wavelengths and concomitant actuation properties.

    3. Artificial Ion Channels Regulating Light-Induced Ionic Currents in Photoelectrical Conversion Systems (pages 2329–2334)

      Zheyi Meng, Han Bao, Jingtao Wang, Chendi Jiang, Minghui Zhang, Jin Zhai and Lei Jiang

      Version of Record online: 17 DEC 2013 | DOI: 10.1002/adma.201304755

      Thumbnail image of graphical abstract

      Artificial ion channels are introduced into a photosystem II photoelectrical conversion system to mimic the photocurrent regulating of the natural PSII energy system on the thylakoid membrane. In the composite system, PSII complexes act as pumps to convert light into currents and artificial ion channels act as valves to regulate light-induced ionic currents.

    4. Active Digital Microfluidic Paper Chips with Inkjet-Printed Patterned Electrodes (pages 2335–2340)

      Hyojin Ko, Jumi Lee, Yongjun Kim, Byeongno Lee, Chan-Hee Jung, Jae-Hak Choi, Oh-Sun Kwon and Kwanwoo Shin

      Version of Record online: 13 JAN 2014 | DOI: 10.1002/adma.201305014

      Thumbnail image of graphical abstract

      Active, paper-based, microfluidic chips driven by electrowetting are fabricated and demonstrated for reagent transport and mixing. Instead of using the passive capillary force on the pulp to actuate a flow of a liquid, a group of digital drops are transported along programmed trajectories above the electrodes printed on low-cost paper, which should allow point-of-care production and diagnostic activities in the future.

    5. Role of Localized States on Carrier Transport in Bulk Heterojunction Materials Comprised of Organic Small Molecule Donors (pages 2341–2345)

      Chengmei Zhong, Fei Huang, Yong Cao, Daniel Moses and Alan J. Heeger

      Version of Record online: 19 DEC 2013 | DOI: 10.1002/adma.201304791

      Thumbnail image of graphical abstract

      The photocarrier transport properties in two leading molecular bulk-heterojunction systems, p-DTS(PTTh2)2:PC71BM and p-DTS(FBTTh2)2:PC71BM, are studied using transient photoconductivity measurements. We find that in these systems shallow trap states are distributed at relatively narrow energy range, giving rise to time-independent carrier mobility in the nanosecond time regime that evidently contributes to the high performance of molecular-based OPV devices.

    6. Pressure-Induced Superconductivity and Its Scaling with Doping-Induced Superconductivity in the Iron Pnictide with Skutterudite Intermediary Layers (pages 2346–2351)

      Peiwen Gao, Liling Sun, Ni Ni, Jing Guo, Qi Wu, Chao Zhang, Dachun Gu, Ke Yang, Aiguo Li, Sheng Jiang, Robert Joseph Cava and Zhongxian Zhao

      Version of Record online: 27 JAN 2014 | DOI: 10.1002/adma.201305154

      Thumbnail image of graphical abstract

      Pressure-induced superconductivity is oberserved in Ca10(Pt3As8)(Fe2As2)5 by in situ high-pressure resistance and magnetic susceptibility measurements. Scaling of the pressure-induced and doping-induced superconductivity shows that the electronic phase diagrams of the pressurized and chemically doped 10–3–8 compound are similar in the moderate pressure and doping range but are disparate at higher pressure and heavy doping.

  9. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. You have free access to this content
      Plasmonic Nanostructures: 3D Nanostar Dimers with a Sub-10-nm Gap for Single-/Few-Molecule Surface-Enhanced Raman Scattering (Adv. Mater. 15/2014) (page 2352)

      Manohar Chirumamilla, Andrea Toma, Anisha Gopalakrishnan, Gobind Das, Remo Proietti Zaccaria, Roman Krahne, Eliana Rondanina, Marco Leoncini, Carlo Liberale, Francesco De Angelis and Enzo Di Fabrizio

      Version of Record online: 11 APR 2014 | DOI: 10.1002/adma.201470099

      Thumbnail image of graphical abstract

      Giant electromagnetic field enhancement in specifically designed hot-spots plays a key role in chemical sensing via plasmon-assisted Raman spectroscopy. On page 2353, A. Toma and co-workers present novel 3D nanostar dimer structures that enable field confinement in highly localized regions, which are decoupled from the substrate surface by their elevated architecture. These nanostar dimers can be exploited for single/few molecules detection.

  10. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. 3D Nanostar Dimers with a Sub-10-nm Gap for Single-/Few-Molecule Surface-Enhanced Raman Scattering (pages 2353–2358)

      Manohar Chirumamilla, Andrea Toma, Anisha Gopalakrishnan, Gobind Das, Remo Proietti Zaccaria, Roman Krahne, Eliana Rondanina, Marco Leoncini, Carlo Liberale, Francesco De Angelis and Enzo Di Fabrizio

      Version of Record online: 22 JAN 2014 | DOI: 10.1002/adma.201304553

      Thumbnail image of graphical abstract

      Plasmonic nanostar-dimers, decoupled from the substrate, have been fabricated by combining electron-beam lithography and reactive-ion etching techniques. The 3D architecture, the sharp tips of the nanostars and the sub-10 nm gap size promote the formation of giant electric-field in highly localized hot-spots. The single/few molecule detection capability of the 3D nanostar-dimers has been demonstrated by Surface-Enhanced Raman Scattering.

    2. Bulk Interpenetration Network of Thermoelectric Polymer in Insulating Supporting Matrix (pages 2359–2364)

      Guanghao Lu, Laju Bu, Sijun Li and Xiaoniu Yang

      Version of Record online: 6 FEB 2014 | DOI: 10.1002/adma.201305320

      Thumbnail image of graphical abstract

      Thermoelectric properties of conjugated polymers are found to improve upon homogeneously distributing conjugated polymer into an insulating supporting matrix. The local one-dimensional charge transport along the interpenetration conductive network simultaneously leads to lower thermal conductivity, higher electrical conductivity without sacrifice of Seebeck coefficient, and thus a higher figure of merit ZT, as compared with neat conjugated polymer.

    3. Low Porosity Metallic Periodic Structures with Negative Poisson's Ratio (pages 2365–2370)

      Michael Taylor, Luca Francesconi, Miklós Gerendás, Ali Shanian, , Carl Carson and Katia Bertoldi

      Version of Record online: 23 DEC 2013 | DOI: 10.1002/adma.201304464

      Thumbnail image of graphical abstract

      Auxetic behavior in low porosity metallic structures is demonstrated via a simple system of orthogonal elliptical voids. In this minimal 2D system, the Poisson's ratio can be effectively controlled by changing the aspect ratio of the voids. In this way, large negative values of Poisson's ratio can be achieved, indicating an effective strategy for designing auxetic structures with desired porosity.

    4. Multicellular Assembly and Light-Regulation of Cell–Cell Communication by Conjugated Polymer Materials (pages 2371–2375)

      Bing Wang, Jinzhao Song, Huanxiang Yuan, Chenyao Nie, Fengting Lv, Libing Liu and Shu Wang

      Version of Record online: 12 DEC 2013 | DOI: 10.1002/adma.201304593

      Thumbnail image of graphical abstract

      Using cell-surface modification and biotin–streptavidin interactions, immune cells and target tumor cells are made to form multicellular assemblies. A polythiophene derivative can undergo cellular uptake, allowing the sensitization of oxygen under light irradiation. The subsequent generation of reactive oxygen species (ROS) regulates cell–cell communication in time and space.

    5. Microscopic Signature of Metallic State in Semicrystalline Conjugated Polymers Doped with Fluoroalkylsilane Molecules (pages 2376–2383)

      Hisaaki Tanaka, Masataka Hirate, Shun Watanabe and Shin-ichi Kuroda

      Version of Record online: 11 DEC 2013 | DOI: 10.1002/adma.201304691

      Thumbnail image of graphical abstract

      Fluoroalkylsilane (FTS) acts as an efficient p-type dopant for organic semiconductors. FTS-doped films of the semicrystalline PBTTT polymer exhibit relatively high conductivities. We demonstrate that highly doped PBTTT films exhibit a metallic nature with clear Pauli paramagnetism as observed microscopically using electron spin resonance spectroscopy. The metallic state is realized within crystalline grains, as confirmed from the anisotropy of the ESR signal.

    6. Two-Dimensional Programmable Manipulation of Magnetic Nanoparticles on-Chip (pages 2384–2390)

      Anandakumar Sarella, Andrea Torti, Marco Donolato, Matteo Pancaldi and Paolo Vavassori

      Version of Record online: 30 JAN 2014 | DOI: 10.1002/adma.201304240

      Thumbnail image of graphical abstract

      A novel device is designed for on-chip selective trap and two-dimensional remote manipulation of single and multiple fluid-borne magnetic particles using field controlled magnetic domain walls in circular nanostructures. The combination of different ring-shaped nanostructures and field sequences allows for remote manipulation of magnetic particles with high-precision along any arbitrary pathway on a chip surface.

    7. Controlled Pixelation of Inverse Opaline Structures Towards Reflection-Mode Displays (pages 2391–2397)

      Su Yeon Lee, Shin-Hyun Kim, Hyerim Hwang, Jae Young Sim and Seung-Man Yang

      Version of Record online: 23 JAN 2014 | DOI: 10.1002/adma.201304654

      Thumbnail image of graphical abstract

      Pixelated inverse opals with red, green, and blue colors were prepared by hybridizing convective assembly of colloidal particles and photolithography techniques. The brilliant structural colors, high mechanical stability, and small feature size of the pixels were simultaneously accomplished, thereby providing color reflectors potentially useful for display devices. Moreover, this hybridized method provides a general means to create multi-colored photonic crystals.

    8. Peptide-Tunable Drug Cytotoxicity via One-Step Assembled Polymer Nanoparticles (pages 2398–2402)

      Kang Liang, Joseph J. Richardson, Hirotaka Ejima, Georgina K. Such, Jiwei Cui and Frank Caruso

      Version of Record online: 27 DEC 2013 | DOI: 10.1002/adma.201305002

      Thumbnail image of graphical abstract

      A novel class of nanoparticles is developed for the co-delivery of a short cell penetrating peptide and a chemotherapeutic drug to achieve enhanced cytotoxicity. Tunable cytotoxicity is achieved through non-toxic peptide-facilitated gating. The strategy relies on a one-step blending process from polymer building blocks to form monodisperse, PEGylated particles that are sensitive to cellular pH variations. By varying the amount of peptide loading, the chemotherapeutic effects can be enhanced by up to 30-fold.

    9. Labyrinth-Induced Faceted Electrochemical Growth (pages 2403–2407)

      Maik R. J. Scherer, Pedro M. S. Cunha and Ullrich Steiner

      Version of Record online: 1 FEB 2014 | DOI: 10.1002/adma.201305074

      Thumbnail image of graphical abstract

      A path-length bias of nucleated electrochemical growth in a 3D periodic nano­maze is found to cause facet formation of an intrinsically isotropic material in a porous self-assembled gyroid network. This is the first report of faceted electrochemical growth that is not based on the crystallographic order of the constituent building blocks, but rather reflects the symmetry of the template in which the material is synthesized.

    10. Strongly Coupled NiCo2O4-rGO Hybrid Nanosheets as a Methanol-Tolerant Electrocatalyst for the Oxygen Reduction Reaction (pages 2408–2412)

      Genqiang Zhang, Bao Yu Xia, Xin Wang and Xiong Wen (David) Lou

      Version of Record online: 16 DEC 2013 | DOI: 10.1002/adma.201304683

      Thumbnail image of graphical abstract

      Strongly coupled NiCo2O4-rGO hybrid nanosheets are syntheiszed through a cost-effective two-step strategy involving a facile polyol process and subsequent thermal annealing treatment in air. The hybrid nanosheets exhibit impressive electrocatalytic performance for the oxygen reduction reaction (ORR) with a current density and onset potential comparable to those of commercial Pt/C catalyts, while having perfect tolerance to methanol..

    11. An Optical Nose Chip Based on Mesoporous Colloidal Photonic Crystal Beads (pages 2413–2418)

      Zhuoying Xie, Kaidi Cao, Yuanjin Zhao, Lin Bai, Hongcheng Gu, Hua Xu and Zhong-Ze Gu

      Version of Record online: 21 DEC 2013 | DOI: 10.1002/adma.201304775

      Thumbnail image of graphical abstract

      An optical nose chip is developed using surface functionalized mesoporous colloidal photonic crystal beads as elements. The prepared optical nose chip displays excellent discrimination among a very wide range of compounds, not only the simplex organic vapors from the different or same chemical family, but also the complex expiratory air from different people.

    12. Enhanced Energy Transfer in Quasi-Quaternary Nanocrystal Superlattices (pages 2419–2423)

      Matteo Cargnello, Benjamin T. Diroll, E. Ashley Gaulding and Christopher B. Murray

      Version of Record online: 19 DEC 2013 | DOI: 10.1002/adma.201304136

      Thumbnail image of graphical abstract

      Quasi-quaternary nanocrystal superlattices are assembled by using exclusively core-shell particles as building blocks. The assemblies show an enhancement of energy-transfer from cadmium selenide-based core-shell quantum dots to gold-iron oxide core-shell nanocrystals compared to random mixtures of the same components.

    13. DNA-mediated Construction of Hollow Upconversion Nanoparticles for Protein Harvesting and Near-Infrared Light Triggered Release (pages 2424–2430)

      Li Zhou, Zhaowei Chen, Kai Dong, Meili Yin, Jinsong Ren and Xiaogang Qu

      Version of Record online: 17 DEC 2013 | DOI: 10.1002/adma.201304437

      Thumbnail image of graphical abstract

      A simple DNA-mediated solvothermal method has been developed for the construction of well-defined hollow UNPs that can be used for a new paradigm to realize NIR light-controlled non-invasive protein release. In vitro studies show that the UNPs are capable of the transportation of enzyme into living cells. Intracellular NIR triggers the release of enzymes with high spatial and temporal precision and the released enzyme also retains its biological activity.

    14. Highly Sensitive, Uniform, and Reproducible Surface-Enhanced Raman Spectroscopy from Hollow Au-Ag Alloy Nanourchins (pages 2431–2439)

      Zhen Liu, Zhongbo Yang, Bo Peng, Cuong Cao, Chao Zhang, Hongjun You, Qihua Xiong, Zhiyuan Li and Jixiang Fang

      Version of Record online: 21 JAN 2014 | DOI: 10.1002/adma.201305106

      Thumbnail image of graphical abstract

      A hierarchical nanoparticle strategy to simultaneously gain super Raman signal amplification, high uniformity, and reproducibility is presented. Using hollow Au-Ag alloy nanourchins, an ultrahigh sensitivity, e.g., down to 1 fM concentrations for DEHP molecule is obtained. A small standard deviation of <10% is achieved by simply dropping and evaporating sub-100 nm nanourchins onto a substrate.

  11. Research News

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Inside Back Cover
    5. Back Cover
    6. Masthead
    7. Contents
    8. Progress Reports
    9. Communications
    10. Frontispiece
    11. Communications
    12. Research News
    1. Ideal Three-Dimensional Electrode Structures for Electrochemical Energy Storage (pages 2440–2445)

      Sakineh Chabi, Chuang Peng, Di Hu and Yanqiu Zhu

      Version of Record online: 16 DEC 2013 | DOI: 10.1002/adma.201305095

      Thumbnail image of graphical abstract

      Ideal 3D electrodes offer kinetics and mass transport advantages in electrochemical energy storage. The common features of ideal 3D electrodes are summarized and recent advances in both template-assisted and template-free synthesis, as well as the electrode performance, are reviewed.

SEARCH

SEARCH BY CITATION