Advanced Materials

Cover image for Vol. 25 Issue 35

September 20, 2013

Volume 25, Issue 35

Pages 4817–4949

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
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      Nanothermometry: All-In-One Optical Heater-Thermometer Nanoplatform Operative From 300 to 2000 K Based on Er3+ Emission and Blackbody Radiation (Adv. Mater. 35/2013) (page 4817)

      Mengistie L. Debasu, Duarte Ananias, Isabel Pastoriza-Santos, Luis M. Liz-Marzán, J. Rocha and Luís D. Carlos

      Version of Record online: 17 SEP 2013 | DOI: 10.1002/adma.201370219

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      A nanoplatform accomplishes simultaneous laser-induced heat generation by gold nanoparticles and temperature sensing by (Gd,Yb,Er)2O3 nanorods, presenting considerable potential for hyperthermia and deep-tissue optical imaging. On page 4868, Luis D. Carlos, J. Rocha and co-workers assess the local temperature from the Boltzmann distribution of the Er3+ up-conversion 2H11/2[RIGHTWARDS ARROW]4|15/2/4S3/2[RIGHTWARDS ARROW]4|15/2 intensity ratio (300–1050 K) or Planck's law for white-light emission (1200–2000 K).

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
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      Molecular Electronics: Mechanically Controllable Break Junctions for Molecular Electronics (Adv. Mater. 35/2013) (page 4818)

      Dong Xiang, Hyunhak Jeong, Takhee Lee and Dirk Mayer

      Version of Record online: 17 SEP 2013 | DOI: 10.1002/adma.201370220

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      A mechanically controllable break junction (MCBJ) has been proved to be a very useful technique to form a single molecule junction due to its unique advantage of excellent mechanical stability. MCBJs have dramatically promoted the development of molecular electronics, as reviewed by Dirk Mayer, Takhee Lee and co-workers on page 4845. The separation of two electrodes can be precisely controlled in sub-Ångstrom accuracy to incorporate single molecule junction by bending or relaxing the substrate.

  3. Back Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
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      Solar Cells: One-Dimensional Hierarchical Nanostructures of TiO2 Nanosheets on SnO2 Nanotubes for High Efficiency Solid-State Dye-Sensitized Solar Cells (Adv. Mater. 35/2013) (page 4952)

      Sung Hoon Ahn, Dong Jun Kim, Won Seok Chi and Jong Hak Kim

      Version of Record online: 17 SEP 2013 | DOI: 10.1002/adma.201370221

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      Jong Hak Kim and co-workers report on page 4893 a unique, effective design structure for a photoanode, consisting of an SnO2 nanotube-TiO2 nanosheet core-shell (SNT@TNS), interdispersed in an organized mesoporous TiO2 film. The high efficiency results from the effects of combining the well-organized structure of the TiO2 film and the excellent electron transport, as well as the good light scattering of SNT@TNS.

  4. Masthead

    1. Top of page
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    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
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      Masthead: (Adv. Mater. 35/2013)

      Version of Record online: 17 SEP 2013 | DOI: 10.1002/adma.201370222

  5. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
    1. You have free access to this content
  6. Correspondence

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
  7. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
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      Nanowires and Nanostructures that Grow like Polymer Molecules (Adv. Mater. 35/2013) (page 4828)

      Santosh Shaw and Ludovico Cademartiri

      Version of Record online: 17 SEP 2013 | DOI: 10.1002/adma.201370224

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      The similarities between crystallization and polymerization are discussed, the existing experimental evidence of polymer-like growth kinetics and behaviour in crystals and nanostructures is reviewed and guidelines for the synthesis of polymer-like crystals and assemblies are proposed in the progress report by Ludovico Cademartiri and Santosh Shaw on page 4829. The limitations of crystals could be overcome through growth processes that mimic polymerization.

  8. Progress Report

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
    1. Nanowires and Nanostructures that Grow like Polymer Molecules (pages 4829–4844)

      Santosh Shaw and Ludovico Cademartiri

      Version of Record online: 24 JUN 2013 | DOI: 10.1002/adma.201300850

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      Unique properties determine the utility of polymer molecules and derive from their morphology and flexibility. Crystals do not display those properties because they have smaller aspect ratios and are stiffer. We argue that these limitations might be overcome by growth processes of controlled aggregation that mimic polymerization. This rising area of interest is discussed and recent experimental evidence reviewed.

  9. Review

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
    1. Mechanically Controllable Break Junctions for Molecular Electronics (pages 4845–4867)

      Dong Xiang, Hyunhak Jeong, Takhee Lee and Dirk Mayer

      Version of Record online: 2 AUG 2013 | DOI: 10.1002/adma.201301589

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      A mechanically controllable break junction (MCBJ) represents a fundamental technique for the investigation of molecular electronic junctions, especially for the study of electron transport through single molecules. This review summarizes the progress of the MCBJ technique including sample fabrication, potential applications, and challenges.

  10. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
    1. All-In-One Optical Heater-Thermometer Nanoplatform Operative From 300 to 2000 K Based on Er3+ Emission and Blackbody Radiation (pages 4868–4874)

      Mengistie L. Debasu, Duarte Ananias, Isabel Pastoriza-Santos, Luis M. Liz-Marzán, J. Rocha and Luís D. Carlos

      Version of Record online: 21 MAY 2013 | DOI: 10.1002/adma.201300892

      Thumbnail image of graphical abstract

      A single nanoplatform integrating laser-induced heat generation by gold nanoparticles and temperature sensing up to 2000 K via (Gd,Yb,Er)2O3 nanorods is demonstrated, which presents considerable potential for nanoscale photonics and biomedicine. Blackbody emission is ascertained from the temperature increment with AuNP concentration, emission color coordinates as a function of the laser pump power, and Planck's law of blackbody radiation.

    2. Non-Porous Low-k Dielectric Films Based on a New Structural Amorphous Fluoropolymer (pages 4875–4878)

      Chao Yuan, Kaikai Jin, Kai Li, Shen Diao, Jiawei Tong and Qiang Fang

      Version of Record online: 15 JUL 2013 | DOI: 10.1002/adma.201302021

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      A non-porous and amorphous fluoropolymer PFN with low dielectric constant of 2.33 and dielectric loss less than 1.2 × 10−3 is reported here. PFN also exhibits good mechanical properties and high thermostability. This study is a new example of a fully dense material showing a low k value and having good thermo/mechanical properties.

  11. THIS ARTICLE HAS BEEN RETRACTED

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
    1. Retracted: High-Volumetric Performance Aligned Nano-Porous Microwave Exfoliated Graphite Oxide-based Electrochemical Capacitors (pages 4879–4885)

      Mehdi Ghaffari, Yue Zhou, Haiping Xu, Minren Lin, Tae Young Kim, Rodney S. Ruoff and Q. M. Zhang

      Version of Record online: 15 AUG 2013 | DOI: 10.1002/adma.201301243

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      Ultra-high volumetric performance electrochemical double layer capacitors based on high density aligned nano-porous microwave exfoliated graphite oxide have been studied. Elimination of macro-, meso-, and larger micro-pores from electrodes and controlling the nano-morphology results in very high volumetric capacitance, energy, and power density values.

  12. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Correspondence
    8. Frontispiece
    9. Progress Report
    10. Review
    11. Communications
    12. THIS ARTICLE HAS BEEN RETRACTED
    13. Communications
    1. Voltage-Impulse-Induced Non-Volatile Ferroelastic Switching of Ferromagnetic Resonance for Reconfigurable Magnetoelectric Microwave Devices (pages 4886–4892)

      Ming Liu, Brandon M. Howe, Lawrence Grazulis, Krishnamurthy Mahalingam, Tianxiang Nan, Nian X. Sun and Gail J. Brown

      Version of Record online: 15 JUL 2013 | DOI: 10.1002/adma.201301989

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      A critical challenge in realizing magnetoelectrics based on reconfigurable microwave devices, which is the ability to switch between distinct ferromagnetic resonances (FMR) in a stable, reversible and energy efficient manner, has been addressed. In particular, a voltage-impulse-induced two-step ferroelastic switching pathway can be used to in situ manipulate the magnetic anisotropy and enable non-volatile FMR tuning in FeCoB/PMN-PT (011) multiferroic heterostructures.

    2. One-Dimensional Hierarchical Nanostructures of TiO2 Nanosheets on SnO2 Nanotubes for High Efficiency Solid-State Dye-Sensitized Solar Cells (pages 4893–4897)

      Sung Hoon Ahn, Dong Jun Kim, Won Seok Chi and Jong Hak Kim

      Version of Record online: 15 JUL 2013 | DOI: 10.1002/adma.201302226

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      Hierarchical nanostructures of TiO2 nanosheets on SnO2 nanotubes (SNT@TNS) are uniformly dispersed in an organized mesoporous (OM) TiO2 film with large pores, high porosity, and good interconnectivity. The solid-state dye sensitized solar cells (ssDSSCs) fabricated with 10 wt% SNT@TNS dispersed in a OM–TiO2 film show an energy conversion efficiency of 7.7% at 100 mW cm−2, which is one of the highest values for N719-based ssDSSCs and much larger than that of a randomly oriented TiO2 nanoparticles-based cell (4.0%).

    3. Rational Design of Multifunctional Upconversion Nanocrystals/Polymer Nanocomposites for Cisplatin (IV) Delivery and Biomedical Imaging (pages 4898–4905)

      Ping'an Ma, Haihua Xiao, Xiaoxue Li, Chunxia Li, Yunlu Dai, Ziyong Cheng, Xiabin Jing and Jun Lin

      Version of Record online: 15 JUL 2013 | DOI: 10.1002/adma.201301713

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      By combining upconversion nanoparticles with the cisplatin (IV) prodrug we have demonstrated that a stable and multifunctional drug delivery system can be designed that will both reduce the drawbacks of cisplatin and give insight in to its in vitro/in vivo imaging. The up/down-conversion fluorescence are detectable and show obvious co-localization, demonstrating that the nanoparticles are rather stable inside cells and retain the UCNPs and block copolymer.

    4. Controlling the Interaction of Light with Polymer Semiconductors (pages 4906–4911)

      Christoph Hellmann, Francis Paquin, Neil D. Treat, Annalisa Bruno, Luke X. Reynolds, Saif A. Haque, Paul N. Stavrinou, Carlos Silva and Natalie Stingelin

      Version of Record online: 15 JUL 2013 | DOI: 10.1002/adma.201300881

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      In this study, a generally applicable strategy is described to manipulate the optical properties of a wide range of polymer semiconductors in the solid state. Blending these materials with a non-conjugated, polar polymer matrix is found to be the processing key to a drastic change and red-shift of the absorption characteristics.

    5. Bio-Inspired High-Performance and Recyclable Cross-Linked Polymers (pages 4912–4917)

      Shen Yu, Rongchun Zhang, Qiang Wu, Tiehong Chen and Pingchuan Sun

      Version of Record online: 17 JUL 2013 | DOI: 10.1002/adma.201301513

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      Bio-inspired molecular design and synthesis of high-performance and recyclable cross-linked polymers is reported. Reversible cross-links between hard segments are incorporated into linear segmented polyurethane via Diels-Alder reaction between maleimide pendant group and furan cross-linker. The materials form hierarchical structure and exhibit excellent properties with high stiffness, strength and toughness, and can be easily thermally reshaped and re-mended.

    6. Ultra-Sensitive Graphene-Plasmonic Hybrid Platform for Label-Free Detection (pages 4918–4924)

      Pu Wang, Owen Liang, Wei Zhang, Thomas Schroeder and Ya-Hong Xie

      Version of Record online: 6 AUG 2013 | DOI: 10.1002/adma.201300635

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      A graphene-Au nano-pyramid hybrid system that enables label-free single molecule detection is demonstrated. The bio-compatible graphene-based SERS platform boosts a high density of hot spots with local SERS enhancement factor over 1010. We demonstrate that graphene can play a key role in quantitative study of SERS mechanisms, and can also serve as a promising building block in SERS active structures especially for biosensor applications.

    7. Cable-Type Supercapacitors of Three-Dimensional Cotton Thread Based Multi-Grade Nanostructures for Wearable Energy Storage (pages 4925–4931)

      Nishuang Liu, Wenzhen Ma, Jiayou Tao, Xianghui Zhang, Jun Su, Luying Li, Congxing Yang, Yihua Gao, Dmitri Golberg and Yoshio Bando

      Version of Record online: 29 JUL 2013 | DOI: 10.1002/adma.201301311

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      A novel cable-type flexible supercapacitor with excellent performance is fabricated using 3D polypyrrole(PPy)-MnO2-CNT-cotton thread multi-grade nanostructure-based electrodes. The multiple supercapacitors with a high areal capacitance 1.49 F cm−2 at a scan rate of 1 mV s−1 connected in series and in parallel can successfully drive a LED segment display. Such an excellent performance is attributed to the cumulative effect of conducting single-walled carbon nanotubes on cotton thread, active mesoporous flower-like MnO2 nanoplates, and PPy conductive wrapping layer improving the conductivity, and acting as pseudocapacitance material simultaneously.

    8. Synthesis of Phosphorus-Doped Graphene and its Multifunctional Applications for Oxygen Reduction Reaction and Lithium Ion Batteries (pages 4932–4937)

      Chenzhen Zhang, Nasir Mahmood, Han Yin, Fei Liu and Yanglong Hou

      Version of Record online: 17 JUL 2013 | DOI: 10.1002/adma.201301870

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      We develop a simple and economical thermal annealing method for the synthesis of phosphorus-doped graphene, which exhibits remarkable electrocatalytic activity towards the oxygen reduction reaction and enhances the electrochemical performance as an anode material for lithium ion batteries. The experimental results suggest the significant role of phosphorus atoms in graphene.

    9. Room Temperature Electrical and Thermal Switching CNT/Hexadecane Composites (pages 4938–4943)

      P. C. Sun, Y. L. Wu, J. W. Gao, G. A. Cheng, G. Chen and R. T. Zheng

      Version of Record online: 15 JUL 2013 | DOI: 10.1002/adma.201302165

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      A large contrast in the electrical and thermal conductivities via a first order phase transition in surface-functionalized carbon nanotube(CNT)/hexadecane composites is reported. Surface modification of the CNTs improves the electrical conductivity contrast and the stability of the composites. We demonstrate that, with these composites, the electrical conductivity changes above 105 times and the thermal conductivity varies up to 3 times at 18 °C.

    10. Efficient Polymer Solar Cells Based on Benzothiadiazole and Alkylphenyl Substituted Benzodithiophene with a Power Conversion Efficiency over 8% (pages 4944–4949)

      Maojie Zhang, Yu Gu, Xia Guo, Feng Liu, Shaoqing Zhang, Lijun Huo, Thomas P. Russell and Jianhui Hou

      Version of Record online: 19 JUL 2013 | DOI: 10.1002/adma.201301494

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      A new copolymer PBDTP-DTBT based on benzothiadiazole and alkylphenyl substituted benzodithiophene is synthesized and characterized. The correlation of the evolution of the morphology and photovoltaic performance is investigated. The power conversion efficiency of the polymer solar cells based on PBDTP-DTBT/PC71BM (1:1.5, w/w) reaches up to 8.07%, under the irradiation of AM 1.5G, 100 mW/cm2.

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