Advanced Functional Materials

Cover image for Vol. 25 Issue 20

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

  1. Full Papers

    1. Conjugated Polymer Nanodots as Ultrastable Long-Term Trackers to Understand Mesenchymal Stem Cell Therapy in Skin Regeneration

      Guorui Jin, Duo Mao, Pingqiang Cai, Rongrong Liu, Nikodem Tomczak, Jie Liu, Xiaodong Chen, Deling Kong, Dan Ding, Bin Liu and Kai Li

      Article first published online: 29 MAY 2015 | DOI: 10.1002/adfm.201501081

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      Conjugated polymer (CP) nanodots act as noninvasive fluorescent trackers for long-term in vivo tracking of transplanted mesenchymal stem cells to understand the mechanism in skin regeneration. Considering the merits of good fluorescence stability and negligible interference with stem cell properties, CP nanodots hold promising potential as efficient exogenous trackers to answer crucial questions in stem cell therapies.

    2. Deep Cavitand Self-Assembled on Au NPs-MWCNT as Highly Sensitive Benzene Sensing Interface

      Pierrick Clément, Saša Korom, Claudia Struzzi, Enrique J. Parra, Carla Bittencourt, Pablo Ballester and Eduard Llobet

      Article first published online: 29 MAY 2015 | DOI: 10.1002/adfm.201501234

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      A new functionalization of multiwalled carbon nanotube (MWCNTs) is engineered with a cavitand using molecular recognition via host–guest strategy for gas sensing application. The quinoxaline-walled thioether-legged cavitand is self-assembled as a monolayer onto gold nanoparticle decorated oxygen plasma MWCNTs. The sensor shows an unprecedented high sensitivity toward traces of benzene vapors.

    3. Liquid-Filled Valence Tautomeric Microcapsules: A Solid Material with Solution-Like Behavior

      Nuria Alexandra Vázquez-Mera, Claudio Roscini, Jordi Hernando and Daniel Ruiz-Molina

      Article first published online: 29 MAY 2015 | DOI: 10.1002/adfm.201501166

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      Liquid-filled microcapsules are used to reproduce the solution behavior of switchable valence tautomers in the solid state while enabling control over their interconversion temperature.

    4. Controlling Crystallite Orientation of Diketopyrrolopyrrole-Based Small Molecules in Thin Films for Highly Reproducible Multilevel Memory Device: Role of Furan Substitution

      Yang Li, Hua Li, Hongfei Chen, Yu Wan, Najun Li, Qingfeng Xu, Jinghui He, Dongyun Chen, Lihua Wang and Jianmei Lu

      Article first published online: 29 MAY 2015 | DOI: 10.1002/adfm.201501271

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      Organic multilevel memory device has proven effective to achieve high-density data storage. Especially with this device comprising vertically arranged electrodes, strategy of inducing highly oriented crystallite arrangement is desirable. This study reveals that through tuning molecular planarity, the crystallite packing can be efficiently controlled to obtain the favorable orientation that facilitates high-performing and reproducible multilevel memory effects.

    5. Integration of Self-Lubrication and Near-Infrared Photothermogenesis for Excellent Anti-Icing/Deicing Performance

      Xiangyu Yin, Yue Zhang, Daoai Wang, Zhilu Liu, Yupeng Liu, Xiaowei Pei, Bo Yu and Feng Zhou

      Article first published online: 29 MAY 2015 | DOI: 10.1002/adfm.201501101

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      Self-lubrication and photothermogenesis are integrated into a coating for excellent anti-icing and remote deicing application. The frosting and icing process are significantly delayed. Highly efficient photothermogenesis allows rapid melting of ice accumulated on the surface.

    6. Near-Infrared Emitting and Pro-Angiogenic Electrospun Conjugated Polymer Scaffold for Optical Biomaterial Tracking

      Abeni Wickham, Daniel Sjölander, Gunnar Bergström, Ergang Wang, Vijayalakshmi Rajendran, Camilla Hildesjö, Karin Skoglund, K. Peter R. Nilsson and Daniel Aili

      Article first published online: 28 MAY 2015 | DOI: 10.1002/adfm.201500351

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      A biocompatible and angiogenic scaffold that emits in the near infrared region range is fabricated by electrospinning of the luminescent low bandgap polymer TQ1. The scaffold can be visualized in tissue using noninvasive fluorescence and lifetime imaging, which facilitates tracking of the material when implanted. The scaffold demonstrates excellent biocompatibility, tissue integration, and stimulates formation of blood vessels within the implant.

    7. A Chemical Display: Generating Animations by Controlled Diffusion from Porous Voxels

      Yevgeniy V. Kalinin, Shivendra Pandey, Jinpyo Hong and David H. Gracias

      Article first published online: 28 MAY 2015 | DOI: 10.1002/adfm.201500281

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      Information displayed in a chemical display is geometrically encoded within voxels that can be printed on a variety of substrates including flexible surfaces. Spatial and temporal programmed chemical release is used to generate an animation of a running man.

    8. X-Ray Spectroscopic Investigation of Chlorinated Graphene: Surface Structure and Electronic Effects

      Xu Zhang, Theanne Schiros, Dennis Nordlund, Yong Cheol Shin, Jing Kong, Mildred Dresselhaus and Tomás Palacios

      Article first published online: 28 MAY 2015 | DOI: 10.1002/adfm.201500541

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      Plasma-based chlorination on graphene is a unique surface functionalization to realize effective and noninvasive doping. Surface states of doped graphene are systematically investigated through synchrotron-based X-ray spectroscopy. Chlorine doping is a highly nonintrusive process, leaving long-range periodicity of electronic states of graphene intact. Strong substrate effects are observed and studied.

    9. Highly Stretchable and Sensitive Strain Sensors Using Fragmentized Graphene Foam

      Yu Ra Jeong, Heun Park, Sang Woo Jin, Soo Yeong Hong, Sang-Soo Lee and Jeong Sook Ha

      Article first published online: 27 MAY 2015 | DOI: 10.1002/adfm.201501000

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      A highly stretchable and sensitive strain sensor based on a composite of fragmentized graphene foam (FGF) and polydimethylsiloxane (PDMS) is fabricated in a facile process. The FGF/PDMS sensor demonstrates high stretchability up to 70% and high durability over 10 000 stretching cycles with gauge factor in the range of 15–29 depending on the maximum strain applied and the FGF content.

    10. Locally Welded Silver Nano-Network Transparent Electrodes with High Operational Stability by a Simple Alcohol-Based Chemical Approach

      Haifei Lu, Di Zhang, Jiaqi Cheng, Jian Liu, Jian Mao and Wallace C. H. Choy

      Article first published online: 27 MAY 2015 | DOI: 10.1002/adfm.201501004

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      A simple alcohol-based solution approach is proposed to weld crossed silver nano­wires through a locally chemical welding pathway without any assistance of heat, light, electrical current, or mechanical pressure. In addition, silicon dioxide nanoparticles are used for filling the voids among the nano-networks to depress electrical shorting and enable their application in organic solar cells.

    11. Continuously Tunable Emission in Inverted Type-I CdS/CdSe Core/Crown Semiconductor Nanoplatelets

      Savas Delikanli, Burak Guzelturk, Pedro L. Hernández-Martínez, Talha Erdem, Yusuf Kelestemur, Murat Olutas, Mehmet Zafer Akgul and Hilmi V. Demir

      Article first published online: 27 MAY 2015 | DOI: 10.1002/adfm.201500403

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      Continuously tunable photoluminescence in a model platform of inverted core/crown nanoplatelets is demonstrated with a tunability range of 90 nm. The unique continuous tunable emission is achieved by controlling the lateral width of the CdSe crown around the seed CdS nanoplatelet template because of the finely tuned lateral quantum confinement in the crown region additional to the pure vertical confinement.

    12. Block Copolymer Packing Limits and Interfacial Reconfigurability in the Assembly of Periodic Mesoporous Organosilicas

      Andrew W. Wills, David J. Michalak, Peter Ercius, Ethan R. Rosenberg, Talita Perciano, Daniela Ushizima, Rory Runser and Brett A. Helms

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201501059

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      A packing limit close to the theoretical body-centered-cubic packing density is identified for spherical block copolymer micelles in a matrix-forming material. Beyond the packing limit, the micelles coalesce at their interfaces thereby creating disorder. The work here heralds new design rules for creating ordered porous frameworks of materials of arbitrary composition.

    13. Electrostatically Directed Self-Assembly of Ultrathin Supramolecular Polymer Microcapsules

      Richard M. Parker, Jing Zhang, Yu Zheng, Roger J. Coulston, Clive A. Smith, Andrew R. Salmon, Ziyi Yu, Oren A. Scherman and Chris Abell

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201501079

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      Charged copolymers are selectively partitioned to the interface of a microdroplet by a complementary charged surfactant for supramolecular cross-linking via cucurbit[8]uril. This dynamic assembly process is employed to controllably form hollow microcapsules or solid microparticles from a single solution. The ability to dictate the distribution of a mixture of charged copolymers is demonstrated by the single-step fabrication of distinct core–shell microcapsules.

    14. Extracellular Microreactor for the Depletion of Phenylalanine Toward Phenylketonuria Treatment

      Leticia Hosta-Rigau, Maria J. York-Duran, Tse Siang Kang and Brigitte Städler

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201404180

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      Subcompartmentalized microreactors consisting of liposomes trapped within a poly(dopamine) carrier are extracellular active in a microfluidic set-up which mimics the peristaltic movement of the intestine. The nonhuman enzyme phenylalanine ammonia lyase loaded within the liposomal subunits, converts the undesired amino acid phenylalanine into the nontoxic compound trans-cinnamic acid toward an oral treatment for phenylketonuria.

    15. Foldable Electrochromics Enabled by Nanopaper Transfer Method

      Wenbin Kang, Chaoyi Yan, Ce Yao Foo and Pooi See Lee

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201500527

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      A facile nanopaper transfer strategy is developed for foldable transparent conductors of high quality. Electrochromic nanopaper that maintains a stable performance under repeated folding is demonstrated. The exceptional surface properties of nanocellulose endow a stable cycling and efficient coloration with the electrochromic device. The nano­paper transfer technique creates new opportunities for the next generation deformable electronics.

    16. Flexible Multifunctionalized Carbon Nanotubes-Based Hybrid Nanowires

      Nan Wang, Di Jiang, Lilei Ye, Murali Murugesan, Michael Edwards, Yifeng Fu and Johan Liu

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201501017

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      Multifunctionalized hybrid nanowires based on carbon nanotubes are prepared through different surface modification processes. These hybrid nanowires exhibit both the high electrical conductivity of metal and excellent mechanical properties of carbon nanotubes together with good dispersability. Flexible and stretchable electrodes based on the hybrid nanowires demonstrate stable electro-mechanical properties under large structural deformations.

    17. Recently Advanced Polymer Materials Containing Dithieno[3,2-b:2′,3′-d]phosphole Oxide for Efficient Charge Transfer in High-Performance Solar Cells

      Kwang Hun Park, Yu Jin Kim, Gi Back Lee, Tae Kyu An, Chan Eon Park, Soon-Ki Kwon and Yun-Hi Kim

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201500934

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      Two novel copolymers, PDTP–BDTT and PDTP–BDTSe, containing dithienophosphole oxide units bring superior charge transfer properties by highly polarizable characteristics, which is beneficial for good performance in polymer solar cells.

    18. Multistage Nanovehicle Delivery System Based on Stepwise Size Reduction and Charge Reversal for Programmed Nuclear Targeting of Systemically Administered Anticancer Drugs

      Lian Li, Wei Sun, Jiaju Zhong, Qingqing Yang, Xi Zhu, Zhou Zhou, Zhirong Zhang and Yuan Huang

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201501248

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      A cancer cell nuclear-targeted delivery system for in vivo application is achieved by a multistage responsive approach in which the size and charge of the nanovehicle can be transformable by adapting to the varying barriers.

    19. Photochemical Deposition of Highly Dispersed Pt Nanoparticles on Porous CeO2 Nanofibers for the Water-Gas Shift Reaction

      Ping Lu, Botao Qiao, Ning Lu, Dong Choon Hyun, Jinguo Wang, Moon J. Kim, Jingyue Liu and Younan Xia

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201501392

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      CeO2 porous nanofibers composed of an interconnected network of single crystalline and fully oxidized CeO2 nanoparticles are fabricated through electrospinning and calcination. The hierarchically porous structure enables facile deposition of Pt nanoparticles using a photochemical method. The high porosity of CeO2 nanofibers and the uniform distribution of Pt nanoparticles greatly improve their activity and stability toward the water-gas shift reaction.

    20. Superhydrophobic “Pump”: Continuous and Spontaneous Antigravity Water Delivery

      Moyuan Cao, Kan Li, Zhichao Dong, Cunming Yu, Shuai Yang, Cheng Song, Kesong Liu and Lei Jiang

      Article first published online: 26 MAY 2015 | DOI: 10.1002/adfm.201501320

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      Antigravity transportation of water is becoming a vital issue for the development of advanced devices and new technology. Herein, a centimeter-scale water self-ascent driven only by the surface energy release of water droplets is reported via a superhydrophobic mesh, demonstrating the successful achievement of “water flows upward” without any external forces.