Advanced Materials

Cover image for Vol. 24 Issue 30

Special Issue: Materials Research at Nanyang Technological University, Singapore

August 8, 2012

Volume 24, Issue 30

Pages 4029–4216

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. Materials Research at NTU: (Adv. Mater. 30/2012) (page 4029)

      Article first published online: 2 AUG 2012 | DOI: 10.1002/adma.201290183

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      The front cover of this special issue illustrates selected advanced materials as the building blocks for the peak of excellence in sustainability research at Nanyang Technological University, Singapore. The issue contains contributions from the School of Materials Science and Engineering, Electrical and Electronic Engineering, Mechanical and Aerospace Engineering, Chemical and Bio-medical Engineering, Civil and Environmental Engineering, Physical and Mathematical Sciences and various collaborators, which underscores the dynamism and multidisciplinary research activities on advanced materials in NTU.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. (Adv. Mater. 30/2012) (page 4030)

      Article first published online: 2 AUG 2012 | DOI: 10.1002/adma.201290184

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  3. Masthead

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. Masthead: (Adv. Mater. 30/2012)

      Article first published online: 2 AUG 2012 | DOI: 10.1002/adma.201290185

  4. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. Contents: (Adv. Mater. 30/2012) (pages 4031–4037)

      Article first published online: 2 AUG 2012 | DOI: 10.1002/adma.201290179

  5. Editorial

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
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      Materials Research at Nanyang Technological University, Singapore (pages 4038–4040)

      Pooi See Lee, Jan Ma and Freddy Boey

      Article first published online: 2 AUG 2012 | DOI: 10.1002/adma.201202368

  6. Progress Report

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. Morphing Soft Magnetic Composites (pages 4041–4054)

      Vinh Quang Nguyen, Anansa S. Ahmed and Raju V. Ramanujan

      Article first published online: 3 JUL 2012 | DOI: 10.1002/adma.201104994

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      Magnet–polymer composites are a unique class of actuating materials due to their contactless actuation properties, multiple actuation modes, high actuation strain and strain rate, self-sensing, and quick response. The progress made in the development of this material as an artificial muscle is described in this article, with emphasis on its dynamic properties, work output, and transduction characteristics.

  7. Review

    1. Top of page
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    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
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    15. Research News
    1. Engineering the Electronic Structure of Graphene (pages 4055–4069)

      Da Zhan, Jiaxu Yan, Linfei Lai, Zhenhua Ni, Lei Liu and Zexiang Shen

      Article first published online: 3 JUL 2012 | DOI: 10.1002/adma.201200011

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      Tuning the electronic band structure of graphene is of great importance for its application in electronic devices. In this paper, we review the recent progress in electronic structure engineering of graphene, by applying electric and magnetic fields, introducing chemical intercalation and adsorption, changing stacking geometry and edge structure, introducing defects, as well as applying strain.

  8. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
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    15. Research News
    1. Hybrid Materials and Polymer Electrolytes for Electrochromic Device Applications (Adv. Mater. 30/2012) (page 4070)

      Vijay Kumar Thakur, Guoqiang Ding, Jan Ma, Pooi See Lee and Xuehong Lu

      Article first published online: 2 AUG 2012 | DOI: 10.1002/adma.201290180

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      Electrochromic (EC) materials and polymer electrolytes are the most important components in an electrochromic device (ECD). On page 4071, X. Lu, J. Ma, P. S. Lee, and co-workers review the recent advancements on nanostructured inorganic and conjugated polymer-based organic-inorganic hybrid EC materials. The review also highlights the progress on polymer electrolytes for electrochromic devices as platforms for practical applications.

  9. Reviews

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. Hybrid Materials and Polymer Electrolytes for Electrochromic Device Applications (pages 4071–4096)

      Vijay Kumar Thakur, Guoqiang Ding, Jan Ma, Pooi See Lee and Xuehong Lu

      Article first published online: 11 MAY 2012 | DOI: 10.1002/adma.201200213

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      Electrochromic (EC) materials and polymer electrolytes are the most imperative components in an electrochromic device (ECD). The present review article focuses on the recent advancements on the nanostructured inorganic and conjugated polymer-based organic–inorganic hybrid EC materials. The review also highlights the progress on polymer electrolytes for electrochromic devices as platforms for practical applications.

    2. Two-Dimensional Nanoarchitectures for Lithium Storage (pages 4097–4111)

      Jiehua Liu and Xue-Wei Liu

      Article first published online: 16 APR 2012 | DOI: 10.1002/adma.201104993

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      Inspired by nature, this review is devoted to the recent progress in the fabrication of novel 2D structures and their lithium-storage performance. We herein present a comprehensive overview of six kinds of novel 2D nanostructures in view of their structures obtained with various synthetic strategies. Moreover, the lithium-storage capabilities of 2D architectures are categorized by four themes based on the Li-insertion method.

    3. Re-ordering Chaotic Carbon: Origins and Application of Textured Carbon (pages 4112–4123)

      M. Shakerzadeh, G. C. Loh, N. Xu, W. L. Chow, C. W. Tan, C. Lu, R. C. C. Yap, D. Tan, S. H. Tsang, E. H. T. Teo and B. K. Tay

      Article first published online: 18 MAY 2012 | DOI: 10.1002/adma.201104991

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      Experimental, theoretical, and computational modeling studies on the formation and phase transformation of textured carbon nanostructures upon crystallization of amorphous carbon thin films have been comprehensively surveyed. In addition, the electrical and thermal properties of carbon films containing these nanostructures are also critically examined.

  10. Communications

    1. Top of page
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    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. TiO2 Nanocages: Fast Synthesis, Interior Functionalization and Improved Lithium Storage Properties (pages 4124–4129)

      Zhiyu Wang and Xiong Wen (David) Lou

      Article first published online: 7 FEB 2012 | DOI: 10.1002/adma.201104546

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      High-quality anatase TiO2 nanocages with anisotropic shapes, homogeneous shells and tunable sizes can be fabricated by templating against Cu2O polyhedra under hydrothermal conditions. The interiors of these TiO2 nanocages can be functionalized easily with Au nanoparticles. The promising use of these TiO2 nanocages as an anode material for lithium-ion batteries is also demonstrated.

    2. Cationic Peptidopolysaccharides Show Excellent Broad-Spectrum Antimicrobial Activities and High Selectivity (pages 4130–4137)

      Peng Li, Chuncai Zhou, Shahrzad Rayatpisheh, Kai Ye, Yin Fun Poon, Paula T. Hammond, Hongwei Duan and Mary B. Chan-Park

      Article first published online: 21 MAR 2012 | DOI: 10.1002/adma.201104186

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      Facilely synthesized cationic peptidopolysaccharides, which have a bacterial peptidoglycan-mimetic structure, show outstanding broad-spectrum activities against clinically significant bacteria and fungi and low mammalian cytotoxicity. Their structural affinity with microbial cell-wall constituents promotes penetration to reach the cytoplasmic membrane resulting in excellent antimicrobial activity and high selectivity.

    3. Fabrication of Graphene Nanomesh by Using an Anodic Aluminum Oxide Membrane as a Template (pages 4138–4142)

      Zhiyuan Zeng, Xiao Huang, Zongyou Yin, Hong Li, Yang Chen, Hai Li, Qing Zhang, Jan Ma, Freddy Boey and Hua Zhang

      Article first published online: 21 MAR 2012 | DOI: 10.1002/adma.201104281

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      Large-area graphene nanomesh (GNM) is prepared using a new and effective method, in which the O2 plasma treatment is used with an anodic aluminum oxide (AAO) membrane as an etch mask. By varying the pore size and cell wall thickness of the AAO membrane, GNM with tunable pore size and neck width can be prepared. As proof of concept, a field-effect transistor with 15 nm neck width GNM as the conductive channel is fabricated, which exhibits p-type semiconducting behavior.

  11. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. Making Graphene “Bread”: A Leavening Strategy to Prepare Reduced Graphene Oxide Foams (Adv. Mater. 30/2012) (page 4143)

      Zhiqiang Niu, Jun Chen, Huey Hoon Hng, Jan Ma and Xiaodong Chen

      Article first published online: 2 AUG 2012 | DOI: 10.1002/adma.201290181

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      On page 4144, X. Chen and co-workers use a leavening strategy—involving hydrazine vapor—to prepare reduced graphene oxide (rGO) foams with porous and continuously cross-linked structures from freestanding compact GO lay-ered films. The rGO foams perform excellently as flexible electrode materials for supercapacitors and selective organic absorbents.

  12. Communications

    1. Top of page
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    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. A Leavening Strategy to Prepare Reduced Graphene Oxide Foams (pages 4144–4150)

      Zhiqiang Niu, Jun Chen, Huey Hoon Hng, Jan Ma and Xiaodong Chen

      Article first published online: 30 APR 2012 | DOI: 10.1002/adma.201200197

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      Making graphene “bread”: A leavening strategy – involving hydrazine vapor – is used to prepare reduced graphene oxide (rGO) foams with porous and continuously cross-linked structures from freestanding compact GO layered films. Such rGO foams perform excellently as flexible electrode materials for supercapacitors and selective organic absorbents.

    2. Composition-Tunable Vertically Aligned CdSxSe1-x Nanowire Arrays via van der Waals Epitaxy: Investigation of Optical Properties and Photocatalytic Behavior (pages 4151–4156)

      Jun Pan, Muhammad Iqbal Bakti Utama, Qing Zhang, Xinfeng Liu, Bo Peng, Lai Mun Wong, Tze Chien Sum, Shijie Wang and Qihua Xiong

      Article first published online: 16 MAY 2012 | DOI: 10.1002/adma.201104996

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      The growth of CdSxSe1-x (0 < x < 1) nanowire arrays are demonstrated for the first time with the vapor transport method on a muscovite substrate. The results of our characterizations show that our facile growth method enables accurate composition adjustability for the modulation of the crystalline, optical, and photocatalytic properties of the alloy nanowire arrays.

    3. A Novel Photoanode with Three-Dimensionally, Hierarchically Ordered Nanobushes for Highly Efficient Photoelectrochemical Cells (pages 4157–4162)

      Siva Krishna Karuturi, Jingshan Luo, Chuanwei Cheng, Lijun Liu, Liap Tat Su, Alfred Iing Yoong Tok and Hong Jin Fan

      Article first published online: 29 MAY 2012 | DOI: 10.1002/adma.201104428

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      A 3D hierarchically ordered nanobush structure is fabricated for use as a photoanode in photoelectrochemical cells. The photoanode structure has several favorable intrinsic characteristics, including high interface area, direct electron transport pathways, and engineered light scattering centers. Sensitization with CdS quantum dots is demonstrated, and this nanobush photoanode is expected to be advantageous also in solar cells.

    4. Ferroelectric Tunnel Junction Memory Devices made from Monolayers of Vinylidene Fluoride Oligomers (pages 4163–4169)

      Damar Yoga Kusuma and Pooi See Lee

      Article first published online: 29 MAY 2012 | DOI: 10.1002/adma.201104476

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      Conductance bistability in Pt/Si–vinylidene fluoride (VDF) oligomer–Au ferroelectric tunnel junction devices is demonstrated. I–V and C–V measurements reveal bistable conductance switching within biasing voltage of ±0.5V with stable memory retention up to 1 × 104 cycles. The memory element exhibits a low switching voltage of ±1.0 V, coincides with the coercive field of the ferroelectric VDF oligomer monolayer films in use.

    5. Abnormal Poisson's ratio and Linear Compressibility in Perovskite Materials (pages 4170–4174)

      C. W. Huang, Wei Ren, Viet Cuong Nguyen, Zuhuang Chen, Junling Wang, T. Sritharan and Lang Chen

      Article first published online: 9 MAY 2012 | DOI: 10.1002/adma.201104676

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      The Poisson's ratio of perovskites with a high degree of anisotropy can change from negative to positive and become much larger than the normally observed range of 0.2–0.4 and even greater than the isotropic upper limit 0.5 along certain crystallographic orientations. These results pave the way for a better understanding of elastic-mediated physical properties of perovskites by engineering the orientation-dependent Poisson's ratios.

    6. Zinc Hydroxyapatite Catalyst for Decomposition of 2-Propanol (pages 4175–4179)

      Hou Ran Low, Maxim Avdeev, Kanaparthi Ramesh and Timothy John White

      Article first published online: 20 JUN 2012 | DOI: 10.1002/adma.201104755

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      Hydroxyapatite (HAp) is attracting interest as a heterogeneous catalyst due to its “zeolitic” properties that allow tailoring of chemically active surface sites for specific applications. Here, the crystallographic modification of HAp through incorporation of zinc (Zn2+) was studied using diffraction and spectroscopic techniques. The preferential displacement of tunnel calcium (Ca2+) by covalently bonded Zn2+ inhibits crystal growth and promotes the retention of an amorphous (10-20 wt%) component. In combination, these factors create chemically active surfaces that allow Zn-HAp materials to effectively absorb carbon monoxide (*characteristic vibration at ∼1711 cm-1) and catalyze the decomposition of 2-propanol.

    7. Full Visible Range Covering InP/ZnS Nanocrystals with High Photometric Performance and Their Application to White Quantum Dot Light-Emitting Diodes (pages 4180–4185)

      Xuyong Yang, Dewei Zhao, Kheng Swee Leck, Swee Tiam Tan, Yu Xin Tang, Junliang Zhao, Hilmi Volkan Demir and Xiao Wei Sun

      Article first published online: 30 APR 2012 | DOI: 10.1002/adma.201104990

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      High-quality InP/ZnS core–shell nanocrystals with luminescence tunable over the entire visible spectrum have been achieved by a facile one-pot solvothermal method. These nanocrystals exhibit high quantum yields (above 60%), wide emission spectrum tunability and excellent photostability. The FWHM can be as narrow as 38 nm, which is close to that of CdSe nanocrystals. Also, making use of these nanocrystals, we further demonstrated a cadmium-free white QD-LED with a high color rendering index of 91. The high-performance of the resulting InP/ZnS NCs coupled with their low intrinsic toxicity may further promote industrial applications of these NC emitters.

    8. Nanoporous Walls on Macroporous Foam: Rational Design of Electrodes to Push Areal Pseudocapacitance (pages 4186–4190)

      Cao Guan, Xianglin Li, Zilong Wang, Xiehong Cao, Cesare Soci, Hua Zhang and Hong Jin Fan

      Article first published online: 14 MAY 2012 | DOI: 10.1002/adma.201104295

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      For application as a pseudocapacitor electrode, highly porous CoO nanowalls are fabricated directly on 3D macroporous nickel foam (see images). A relatively high areal capacitance is achieved because of the porous structure. By grafting the porous nanowalls with another pseudocapacitive oxide, the areal capacitance can be further significantly boosted, owing to the increased surface area caused by the hierarchically porous structure as well as a possible synergetic effect between the two oxides.

    9. Graphene Oxide as a Novel Nanoplatform for Enhancement of Aggregation-Induced Emission of Silole Fluorophores (pages 4191–4195)

      Xiaoying Qi, Hai Li, Jacky Wing Yip Lam, Xintong Yuan, Jun Wei, Ben Zhong Tang and Hua Zhang

      Article first published online: 18 MAY 2012 | DOI: 10.1002/adma.201200026

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      Fluorescence enhancement by graphene oxide (GO) is reported, a surprising result as graphene and GO are widely considered as highly efficient fluorescence quenchers. Enhancement of aggregation-induced emission of silole fluorophores (in DES in the figure) in hydrophobic nanoparticles is demonstrated under certain concentration conditions, notably low GO concentration.

  13. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. Mesoporous Carbon Incorporated Metal Oxide Nanomaterials as Supercapacitor Electrodes (Adv. Mater. 30/2012) (page 4196)

      Hao Jiang, Jan Ma and Chunzhong Li

      Article first published online: 2 AUG 2012 | DOI: 10.1002/adma.201290182

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      Supercapacitors have the potential to satisfy the demands of both huge energy and power density in many advanced technologies. In a Research News article on page 4197, C. Li, J. Ma, and H. Jiang review the recent progress in the development of mesoporous carbon incorporated metal oxide nanomaterials for high-performance supercapacitor applications.

  14. Research News

    1. Top of page
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    5. Contents
    6. Editorial
    7. Progress Report
    8. Review
    9. Frontispiece
    10. Reviews
    11. Communications
    12. Frontispiece
    13. Communications
    14. Frontispiece
    15. Research News
    1. Mesoporous Carbon Incorporated Metal Oxide Nanomaterials as Supercapacitor Electrodes (pages 4197–4202)

      Hao Jiang, Jan Ma and Chunzhong Li

      Article first published online: 11 MAY 2012 | DOI: 10.1002/adma.201104942

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      This Research News article aims to review recent progress in the development of mesoporous carbon-incorporated metal oxide nanomaterials, in particular metal oxide nanoparticles confined in ordered mesoporous carbon and 1D metal oxides coated with a layer of mesoporous carbon for high-performance supercapacitor applications.

    2. Graphene-Based Materials for Energy Conversion (pages 4203–4210)

      Nanda Gopal Sahoo, Yongzheng Pan, Lin Li and Siew Hwa Chan

      Article first published online: 10 MAY 2012 | DOI: 10.1002/adma.201104971

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      Graphene as a novel 2D nanomaterial attracts considerable research interest due to its unique properties and is a promising material for applications in energy conversion and storage devices. This Research News summarizes and compares the advancements that have been made and are in progress in the utilization of graphene-based materials for energy conversion.

    3. Development of Nanomaterials for SALDI-MS Analysis in Forensics (pages 4211–4216)

      Angelina Yimei Lim, Jan Ma and Yin Chiang Freddy Boey

      Article first published online: 29 MAY 2012 | DOI: 10.1002/adma.201200027

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      The rapid development of nanomaterials as SALDI-assisting agents in SALDI-TOF-MS has greatly enhanced the capability of this analytical technique. This article describes the ingress of this technique into the field of forensic analysis.

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