Advanced Functional Materials

Cover image for Vol. 25 Issue 4

Early View (Online Version of Record published before inclusion in an issue)

  1. Full Papers

    1. Preparation of Mesoporous Sb-, F-, and In-Doped SnO2 Bulk Powder with High Surface Area for Use as Catalyst Supports in Electrolytic Cells

      Hyung-Suk Oh, Hong Nhan Nong and Peter Strasser

      Article first published online: 12 JAN 2015 | DOI: 10.1002/adfm.201401919

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      The M-doped tin oxides (M = Sb, F, and In) for use as catalyst supports in electrolytic cells are synthesized, showing high surface area, mesoporous structure, good electrical conductivity, and high corrosion resistance. Therefore, this synthesis method is a very effective way to prepare the metal oxide as electrocatalyst supports.

    2. Ultra-High Capacity Lithium-Ion Batteries with Hierarchical CoO Nanowire Clusters as Binder Free Electrodes

      Kangzhe Cao, Lifang Jiao, Yongchang Liu, Huiqiao Liu, Yijing Wang and Huatang Yuan

      Article first published online: 12 JAN 2015 | DOI: 10.1002/adfm.201403111

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      Hierarchical CoO nanowire clusters comprising ultra-small nanoparticles (≈10 nm) on copper foil are successfully fabricated. When used as an anode material for lithium-ion batteries, this binder-free electrode exhibits an ultra-high capacity and excellent rate capability. What is more, the origins of the additional capacity are investigated in detail. Hierarchical core–shell CoO@SiO2 nanowire clusters are also fabricated, to improve cycle stability.

    3. Biodegradable Thin Metal Foils and Spin-On Glass Materials for Transient Electronics

      Seung-Kyun Kang, Suk-Won Hwang, Sooyoun Yu, Jung-Hun Seo, Elise A. Corbin, Jiho Shin, Dae Seung Wie, Rashid Bashir, Zhenqiang Ma and John A. Rogers

      Article first published online: 12 JAN 2015 | DOI: 10.1002/adfm.201403469

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      Materials, fabrication strategies, dissolution kinetics, and biocompatibility studies of transient electronics systems built on thin metal foils passivated by layers of spin-on glass (SOG) are presented. Transient electronic components exhibit comparable performances to conventional, nontransient substrates. Dissolution kinetics of the materials cured at different temperatures reveal key aspects of their corrosion chemistry, and in vitro cell cultures demonstrate their biocompatibility.

    4. Ternary Hybrids of Amorphous Nickel Hydroxide–Carbon Nanotube-Conducting Polymer for Supercapacitors with High Energy Density, Excellent Rate Capability, and Long Cycle Life

      Wenchao Jiang, Dingshan Yu, Qiang Zhang, Kunli Goh, Li Wei, Yili Yong, Rongrong Jiang, Jun Wei and Yuan Chen

      Article first published online: 12 JAN 2015 | DOI: 10.1002/adfm.201403354

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      Ternary hybrid: A ternary hybrid material comprising of amorphous Ni(OH)2 deposited on multiwalled carbon nanotubes wrapped with conductive polymer exhibits an ultrahigh gravimetric specific capacitance of 3262 F g−1. The assembled asymmetric supercapacitors exhibit a high specific energy density of 58.5 W h kg−1 as well as excellent long cycle life (86% capacitance retention after 30 000 cycles).

    5. One-Pot, Facile, and Versatile Synthesis of Monolayer MoS2/WS2 Quantum Dots as Bioimaging Probes and Efficient Electrocatalysts for Hydrogen Evolution Reaction

      Shengjie Xu, Dian Li and Peiyi Wu

      Article first published online: 8 JAN 2015 | DOI: 10.1002/adfm.201403863

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      A facile, low cost, and versatile way to prepare monolayer MoS2/WS2 quantum dots on a large scale with fluorescent properties is proposed via the combination of sonication and solvothermal treatment of MoS2/WS2 powder. The prepared MoS2/WS2 quantum dots exhibit low cytotoxicity and good cell permeability in living cells as well as excellent electrocatalytic activity toward hydrogen evolution reaction.

    6. Edge-Fluorinated Graphene Nanoplatelets as High Performance Electrodes for Dye-Sensitized Solar Cells and Lithium Ion Batteries

      In-Yup Jeon, Myung Jong Ju, Jiantie Xu, Hyun-Jung Choi, Jeong-Min Seo, Min-Jung Kim, In Taek Choi, Hong Mo Kim, Jae Cheon Kim, Jae-Joon Lee, Hua Kun Liu, Hwan Kyu Kim, Shixue Dou, Liming Dai and Jong-Beom Baek

      Article first published online: 8 JAN 2015 | DOI: 10.1002/adfm.201403836

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      Edge-selectively fluorinated graphene nanoplatelets (FGnPs) are prepared by simple mechanochemical ball-milling graphite in the presence of fluorine/argon (20/80, v/v). The FGnPs demonstrate superb electrochemical performance with excellent stability/cycle life in dye-sensitized solar cells and lithium ion batteries.

  2. Feature Articles

    1. State-of-the-Art Progress in Diverse Heterostructured Photocatalysts toward Promoting Photocatalytic Performance

      Haijin Li, Yong Zhou, Wenguang Tu, Jinhua Ye and Zhigang Zou

      Article first published online: 7 JAN 2015 | DOI: 10.1002/adfm.201401636

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      This Feature Article concisely summarizes and highlights the state-of-the-art progress of semiconductor/semiconductor heterostructured photocatalysts with diverse models, including type-I and type-II heterojunctions, Z-scheme system, p–n heterojunctions, and homojunction band alignments, which were explored for effective improvement of photocatalytic activity through increase of the visible-light absorption, promotion of separation and transportation of the photoinduced charge carries, and enhancement of the photocatalytic stability.

  3. Full Papers

    1. HPbI3: A New Precursor Compound for Highly Efficient Solution-Processed Perovskite Solar Cells

      Feng Wang, Hui Yu, Haihua Xu and Ni Zhao

      Article first published online: 7 JAN 2015 | DOI: 10.1002/adfm.201404007

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      HPbI3is introduced as a novel precursor to solve the non-uniformity problem of formamidium lead iodide (FAPbI3) perovskite films from one-step solution-­processed method. Interestingly, the FAPbI3 films exhibit high crystallinity with (110) plane orientation and the corresponding devices yield an average photo­voltaic efficiency of 15.4% under 1 sun illumination. Present results demonstrate that precursor engineering is an effective approach to produce perovskites with attractive properties.

    2. Impact of Blend Morphology on Interface State Recombination in Bulk Heterojunction Organic Solar Cells

      Benjamin Bouthinon, Raphaël Clerc, Jérôme Vaillant, Jean-Marie Verilhac, Jérôme Faure-Vincent, David Djurado, Irina Ionica, Gabriel Man, Antoine Gras, Georges Pananakakis, Romain Gwoziecki and Antoine Kahn

      Article first published online: 5 JAN 2015 | DOI: 10.1002/adfm.201401633

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      The predominance of the band tail states reorganization, characterized by spectral response measurement, in the improvement of the solar cell performances during the annealing step of the active layer is discussed. This energetic reorganization leads to a lowering of the recombinations assisted by trap state (efficiency improvement) and a decrease of the thermal generation from trap states (reverse dark current).

    3. You have full text access to this OnlineOpen article
      Dual-Mechanism Antimicrobial Polymer–ZnO Nanoparticle and Crystal Violet-Encapsulated Silicone

      Sacha Noimark, Jonathan Weiner, Nuruzzaman Noor, Elaine Allan, Charlotte K. Williams, Milo S. P. Shaffer and Ivan P. Parkin

      Article first published online: 5 JAN 2015 | DOI: 10.1002/adfm.201402980

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      Using a simple dipping strategy to incorporate zinc oxide nanoparticles and crystal violet dye in a silicone polymer, a versatile and potent antimicrobial surface is reported to demonstrate high kills under both dark and light conditions, against both Gram-positive and Gram-negative bacteria.

    4. Synthetic Asymmetric-Shaped Nanodevices with Symmetric pH-Gating Characteristics

      Huacheng Zhang, Xu Hou, Jue Hou, Lu Zeng, Ye Tian, Lin Li and Lei Jiang

      Article first published online: 5 JAN 2015 | DOI: 10.1002/adfm.201403693

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      Inspired by asymmetric ion channels with symmetric pH gating features, a bio­inspired asymmetric shaped nanodevice is reported that shows symmetric pH-gating ion transport features based on an asymmetric-polyelectrolyte-functionalized asymmetric hourglass nanochannel. This work, as an example, demonstrates the feasibility of using the asymmetric chemical modification method to achieve symmetric pH gating behaviors inside the asymmetric nanochannels.

    5. Ultrahigh Tunability of Room Temperature Electronic Transport and Ferromagnetism in Dilute Magnetic Semiconductor and PMN-PT Single-Crystal-Based Field Effect Transistors via Electric Charge Mediation

      Qiu-Xiang Zhu, Ming-Min Yang, Ming Zheng, Ren-Kui Zheng, Li-Jie Guo, Yu Wang, Jin-Xing Zhang, Xiao-Min Li, Hao-Su Luo and Xiao-Guang Li

      Article first published online: 5 JAN 2015 | DOI: 10.1002/adfm.201403763

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      High-quality ZnO:Mn semiconductor thin films are successfully integrated with high-performance (111)-oriented perovskite Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals. Unprecedented room temperature charge-mediated electric-field-control of electronic transport and magnetism is demonstrated for Pb(Mg1/3Nb2/3)O3-PbTiO3 single-crystal-based oxide heterostructures in which the relative importance of the strain effect and the interfacial charge effect can be tuned by appropriately adjusting the charge carrier density of the films.

  4. Feature Articles

    1. Modeling of Organic Light Emitting Diodes: From Molecular to Device Properties

      Pascal Kordt, Jeroen J. M. van der Holst, Mustapha Al Helwi, Wolfgang Kowalsky, Falk May, Alexander Badinski, Christian Lennartz and Denis Andrienko

      Article first published online: 3 JAN 2015 | DOI: 10.1002/adfm.201403004

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      Multiscale ansatz for modeling of organic light emitting diodes: single-molecule-based first principle calculations, parameterization of microscopic and coarse-grained models, simulation of IV characteristics. OLED properties can be predicted without fitting parameters, starting from chemical structures of compounds.

  5. Full Papers

    1. Facile One-Step Micropatterning Using Photodegradable Gelatin Hydrogels for Improved Cardiomyocyte Organization and Alignment

      Kelly M. C. Tsang, Nasim Annabi, Francesca Ercole, Kun Zhou, Daniel J. Karst, Fanyi Li, John M. Haynes, Richard A. Evans, Helmut Thissen, Ali Khademhosseini and John S. Forsythe

      Article first published online: 28 DEC 2014 | DOI: 10.1002/adfm.201403124

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      A photodegradable hydrogel comprising a gelatin methacrylamide and an o-nitrobenzyl PEG crosslinker is utilized to create patterned substrates for tissue engineering. Photodegradation enables a facile method of creating striped patterns onto the gels. Patterned hydrogels are shown to improve the degree of alignment and beating regularity of cultured cardiomyocytes, showing promise for culture platforms with spatiotemporal control capabilities.

    2. Improved Thermoelectric Performance of Silver Nanoparticles-Dispersed Bi2Te3 Composites Deriving from Hierarchical Two-Phased Heterostructure

      Qihao Zhang, Xin Ai, Lianjun Wang, Yanxia Chang, Wei Luo, Wan Jiang and Lidong Chen

      Article first published online: 28 DEC 2014 | DOI: 10.1002/adfm.201402663

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      A hierarchical two-phased heterostructure derving from silver nanoparticles and Bi2Te3 is constructed through a bottom-up chemical route, which causes strong scattering of phonons across integrated length scales, significantly reducing the lattice thermal conductivity. Meanwhile, the power factor is improved due to the combination of low-energy electron filtering and excellent electrical transport property of silver itself.

    3. Electronic Structures and Photoconversion Mechanism in Perovskite/Fullerene Heterojunctions

      Ming-Fai Lo, Zhi-Qiang Guan, Tsz-Wai Ng, Chiu-Yee Chan and Chun-Sing Lee

      Article first published online: 28 DEC 2014 | DOI: 10.1002/adfm.201402692

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      While perovskites/fullerene is commonly assumed to form a type II P–N junction with its internal E-field facilitates exciton dissociation, it is found that perovskite/C60 (PCBM) junction is a charge inert type I N–N junction. Devices with such a junction show photovoltaic effects effectively, thus photogenerated excitons can indeed dissociate to free carriers in the perovskite film.

    4. On-Demand Wrinkling Patterns in Thin Metal Films Generated from Self-Assembling Liquid Crystals

      Laurens T. de Haan, Philippe Leclère, Pascal Damman, Albertus P. H. J. Schenning and Michael G. Debije

      Article first published online: 28 DEC 2014 | DOI: 10.1002/adfm.201403399

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      Unique wrinkling patterns with oscillating amplitudes in any arbitrarily complex fashion are generated by controlling the alignment director of a liquid crystal network using photoalignment layers in combination with photomasks. The wrinkled gold surfaces are strikingly visual which is interesting for applications ranging from diffractive elements to fine jewelry. Image adapted with permission. Copyright 1973, Pink Floyd Music Ltd.

    5. Noncovalent Polymer-Gatekeeper in Mesoporous Silica Nanoparticles as a Targeted Drug Delivery Platform

      L. Palanikumar, Eun Seong Choi, Jae Yeong Cheon, Sang Hoon Joo and Ja-Hyoung Ryu

      Article first published online: 23 DEC 2014 | DOI: 10.1002/adfm.201402755

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      A simple and robust polymer-gatekeeper is developed to load a large mass of hydrophilic drugs inside the nonfunctionalized mesoporous silica. The ligand attached polymer-gatekeeper can target specific cancer cells. Opening the gate inside cells by degradation of crosslinked polymer shell in response to the intracellular glutathione triggers the drug release inside the cancer cells to induce cell death.

    6. Materials and Wireless Microfluidic Systems for Electronics Capable of Chemical Dissolution on Demand

      Chi Hwan Lee, Jae-Woong Jeong, Yuhao Liu, Yihui Zhang, Yan Shi, Seung-Kyun Kang, Jeonghyun Kim, Jae Soon Kim, Na Yeon Lee, Bong Hoon Kim, Kyung-In Jang, Lan Yin, Min Ku Kim, Anthony Banks, Ungyu Paik, Yonggang Huang and John A. Rogers

      Article first published online: 23 DEC 2014 | DOI: 10.1002/adfm.201403573

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      Triggerable transient electronics are presented with the use of wireless microfluidics to enable complete dissolution of conventional microelectronic systems on demand in a controlled, programmable manner. Demonstration examples include triggered destruction of home-built metal-oxide-semiconductor field-effect transistors and commercial microchips in radio-frequency identification device.

    7. Efficient Field Emission from Vertically Aligned Cu2O1-δ(111) Nanostructure Influenced by Oxygen Vacancy

      Suman Nandy, Ranjit Thapa, Mohit Kumar, Tapobrata Som, Nenad Bundaleski, Orlando M. N. D. Teodoro, Rodrigo Martins and Elvira Fortunato

      Article first published online: 23 DEC 2014 | DOI: 10.1002/adfm.201402910

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      Cu2O1-δ (111) exhibits promising field emission properties with interesting electron tunneling behavior at low turn-on and threshold voltages of 0.8 and 2.4 V μm–1 respectively. DFT suggests that oxygen vacancies enhance the electron ­donating ability because of unshared d-electrons of Cu atoms (nearest to the vacancy site), allowing an impurity energy state (Eim) close to the conduction band.