• Issue
    Volume 29, Issue 10
    March 7, 2019

Cover Picture

Free Access

Microwave Absorbing Materials: Multifunctional Organic–Inorganic Hybrid Aerogel for Self-Cleaning, Heat-Insulating, and Highly Efficient Microwave Absorbing Material (Adv. Funct. Mater. 10/2019)

  • First Published: 05 March 2019
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In article number 1807624, Xiaofang Liu, Ronghai Yu, and co-workers report a multifunctional aerogel that is assembled with multi-dimensional organic and inorganic components. This lightweight and hydrophobic aerogel shows a variety of functional applications including electromagnetic wave absorption, self-cleaning, and thermal insulation.

Inside Front Cover

Free Access

Metamaterials: Hierarchical Metamaterials for Multispectral Camouflage of Infrared and Microwaves (Adv. Funct. Mater. 10/2019)

  • First Published: 05 March 2019
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In article number 1807319, Hyung Hee Cho and co-workers successfully demonstrate a hierarchical metamaterial (HMM) for multi-spectral control. The intermediate dielectric layer enables the integration of the microwave absorber and infrared selective emitter. The HMM shows not only the signature control against the microwave and infrared spectra, but also the dissipation of the reduced emitting energy through the undetected band of infrared waves.

Inside Back Cover

Free Access

Lithium-Ion Batteries: Tuning Anionic Redox Activity and Reversibility for a High-Capacity Li-Rich Mn-Based Oxide Cathode via an Integrated Strategy (Adv. Funct. Mater. 10/2019)

  • First Published: 05 March 2019
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In article number 1806706, Xiangfeng Liu and co-workers propose to tune the oxygen redox activity and reversibility in an Li-rich Li1.2Mn0.6Ni0.2O2 cathode by an integrated strategy involving Li2SnO3 coating, Sn doping, and spinel phase combination. This synergy not only suppresses the lattice oxygen loss and improves the anionic redox activity and reversibility but also facilitates Li+ migration, which enhances electrochemical performance.

Back Cover

Free Access

Activatable Probes: Bio-Erasable Intermolecular Donor–Acceptor Interaction of Organic Semiconducting Nanoprobes for Activatable NIR-II Fluorescence Imaging (Adv. Funct. Mater. 10/2019)

  • First Published: 05 March 2019
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Activatable second near-infrared window fluorescence (NIR-II, 1000–1700 nm) probes that emit fluorescence via biomarker stimuli have emerged as promising tools to image diseases with an unprecedented tissue depth, spatial resolution, and low background noise. In article number 1807376, Quli Fan and co-workers use a bio-erasable intermolecular donor-acceptor interaction-based strategy to construct stimuli-activatable NIR-II fluorescence probes.

Masthead

Free Access

Masthead: (Adv. Funct. Mater. 10/2019)

  • First Published: 05 March 2019

Contents

Free Access

Contents: (Adv. Funct. Mater. 10/2019)

  • First Published: 05 March 2019

Progress Reports

Tunable Metasurfaces Based on Active Materials

  • First Published: 18 January 2019
Description unavailable

Various mechanisms to achieve dynamic control of metasurfaces enabled by active materials are discussed. Recent works on tunable metasurfaces based on thermo-optic effects, free carrier effects, and phase transitions are summarized. Their respective advantages and challenges are analyzed and an outlook on the potential development of tunable metasurfaces is presented.

Reviews

Interfacial Thermoreversible Chemistry on Functional Coatings: A Focus on the Diels–Alder Reaction

  • First Published: 20 December 2018
Description unavailable

This review reports on the fabrication of functional surfaces with thermoreversible properties and the understanding of their reactivity via the Diels–Alder reaction. Based on various functionalization processes, the designed surfaces have various physico-chemical properties, leading to different Diels–Alder reactivity. The direct cycloaddition is always described in the cited papers but the reversibility of the reaction is less discussed.

Full Papers

Atomic Sulfur Covalently Engineered Interlayers of Ti3C2 MXene for Ultra-Fast Sodium-Ion Storage by Enhanced Pseudocapacitance

  • First Published: 22 January 2019
Description unavailable

Sulfur atoms intercalated Ti3C2 MXene, which serves as a high-performance electrode for sodium-ion storage. After cetyltrimethylammonium bromide pretreatment, S atoms are successfully intercalated into the interlayer of Ti3C2 to form a desirable interlayer-expanded structure via TiS bonding. S atoms intercalated Ti3C2 annealed at 450 °C exhibits fast Na-ion storage kinetics and incremental storage sites after S atoms intercalation.

Multifunctional Organic–Inorganic Hybrid Aerogel for Self-Cleaning, Heat-Insulating, and Highly Efficient Microwave Absorbing Material

  • First Published: 18 December 2018
Description unavailable

A multifunctional microwave absorbing aerogel is designed and synthesized by assembling a variety of organic and inorganic components including polyacrylonitrile fibers, polybenzoxazine membranes, carbon nanotubes (CNTs), and Fe3O4 nanoparticles. This lightweight aerogel not only achieves excellent microwave absorption performances that outperform the current CNT-based magnetic–dielectric hybrids, but also possesses self-cleaning, infrared stealth, and thermal insulation functions.

Hierarchical Metamaterials for Multispectral Camouflage of Infrared and Microwaves

  • First Published: 02 January 2019
Description unavailable

A hierarchical metamaterial (HMM) for multispectral control is successfully demonstrated. The intermediate dielectric layer enables the integration of the microwave absorber and infrared (IR) selective emitter. The HMM shows not only signature control against the microwave and IR spectra, but also the dissipation of the reduced emitting energy through the undetected band of IR waves.

Tuning Anionic Redox Activity and Reversibility for a High-Capacity Li-Rich Mn-Based Oxide Cathode via an Integrated Strategy

  • First Published: 07 January 2019
Description unavailable

The oxygen redox activity and reversibility of a Co-Free Li-rich Mn-based Li1.2Mn0.6Ni0.2O2 cathode are enhanced by an integrated strategy of Li2SnO3 coating-induced Sn doping and spinel phase formation during synchronous lithiation. This synergistic strategy may provide insights into the understanding of and the design of new high-performance materials with enhanced reversible anionic redox behavior and stabilized surface lattice oxygens.

Bio-Erasable Intermolecular Donor–Acceptor Interaction of Organic Semiconducting Nanoprobes for Activatable NIR-II Fluorescence Imaging

  • First Published: 27 December 2018
Description unavailable

A generic design strategy for an activatable second near-infrared window (NIR-II; 1.0–1.7 µm) fluorescence probe is developed based on a bio-erasable intermolecular donor–acceptor interaction. To exemplify the strategy, hypochlorite-sensitive semiconducting acceptors are blended with hypochlorite-inert semiconducting polymer donors to quench their NIR-II fluorescence. In hypochlorite-abnormal tissues, the acceptor can be degraded to erase its acceptor property for amplifying the NIR-II fluorescence of the nanoprobe.

Frontispiece

Free Access

Room Temperature Phosphorescence: Achieving Amorphous Ultralong Room Temperature Phosphorescence by Coassembling Planar Small Organic Molecules with Polyvinyl Alcohol (Adv. Funct. Mater. 10/2019)

  • First Published: 05 March 2019
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In article number 1807243, Yanli Zhao and co-workers develop a strategy to confine planar small organic molecules using polyvinyl alcohol (PVA), where the molecular rotation and vibration of these molecules are restricted in the coassembly, achieving ultralong room temperature phosphorescence. Thus, coassembling multicomponent luminescence dyes with PVA leads to multicolor and flexible luminescence films for display applications.

Full Papers

Achieving Amorphous Ultralong Room Temperature Phosphorescence by Coassembling Planar Small Organic Molecules with Polyvinyl Alcohol

  • First Published: 07 December 2018
Description unavailable

A general approach to afford amorphous ultralong organic phosphorescence (UOP) is developed by coassembling planar small organic molecules with polyvinyl alcohol (PVA). When coassembling these molecules with PVA, their planar structures are well confined in rigid coassembly films, permitting these molecules to show a stable triplet state and generate UOP.

Modulation of Intracellular Oxygen Pressure by Dual-Drug Nanoparticles to Enhance Photodynamic Therapy

  • First Published: 21 January 2019
Description unavailable

A novel strategy for reducing oxygen consumption to attenuate the hypoxia-induced resistance to photodynamic therapy (PDT) by using sub-50 nm dual-drug nanoparticles (ATO/VER NPs) is described. ATO has the ability of alleviating hypoxic regions and can eliminate tumors by enhancing PDT, which provides a valuable reference for research on targeted treatment of hypoxic tumor tissues.

Open Access

Micellar-Mediated Block Copolymer Ordering Dynamics Revealed by In Situ Grazing Incidence Small-Angle X-Ray Scattering during Spin Coating

  • First Published: 18 January 2019
Description unavailable

In situ GISAXS experiments reveal the subsecond self-assembly dynamics of block copolymer (BCP) structuring during spin coating. Two distinct transient micellar structures triggered by the solvent selectivity are responsible for the formation of a fully oriented lamellar phase directly after casting. Visualizing the transient states occurring during spin coating opens new avenues to finely tune the nanostructured BCP thin films.

Hydrated Layered Vanadium Oxide as a Highly Reversible Cathode for Rechargeable Aqueous Zinc Batteries

  • First Published: 20 January 2019
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V5O12·6H2O nanobelts self-supported on a stainless-steel substrate are prepared by electrodeposition and applied as a binder-free cathode for rechargeable aqueous zinc batteries. The V5O12·6H2O cathode with a large layered structure (≈1.18 nm) enables highly reversible Zn2+ (de)intercalation, and displays a high energy density (194 Wh kg-1 at 2100 W kg-1) and a long cycling life (94% retention after 1000 cycles).

Electrocatalytic Upgrading of Lignin-Derived Bio-Oil Based on Surface-Engineered PtNiB Nanostructure

  • First Published: 17 January 2019
Description unavailable

Selective electrocatalytic hydrogenation (ECH) of guaiacol to cyclohexanol and cyclohexanone over PtNiB/CMK-3 with excellent conversion, selectivity, stability, and faradaic efficiency in a H cell is presented under mild reaction conditions; furthermore, this ECH reaction is easily scalable. B-doping optimizes surface electron structure of PtNiB; moreover, the mesoporous CMK-3 exposes more active sites, giving rise to improved ECH activity.

Fluorobenzotriazole (FTAZ)-Based Polymer Donor Enables Organic Solar Cells Exceeding 12% Efficiency

  • First Published: 18 January 2019
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Three polymers L24, L68, and L810 are developed as donor materials for organic solar cells. As the alkyl side chain of the fluorobenzotriazole (FTAZ) unit increases, the L810-based device exhibits lower energy loss, better molecular face-on orientation, and a higher absorption coefficient. Consequently, the power conversion efficiency is improved to 12.1%, which is one of the highest values for FTAZ-based devices.

Activating MoS2 Basal Plane with Ni2P Nanoparticles for Pt-Like Hydrogen Evolution Reaction in Acidic Media

  • First Published: 17 January 2019
Description unavailable

The inert basal plane of 2D molybdenum disulfide (MoS2) is activated for efficient catalysis of the hydrogen evolution reaction (HER) by growing Ni2P nanoparticles on it. The Ni2P/MoS2 heterostructure constructed via in-situ phosphidation of an ingeniously synthesized NiMoS4 single precursor is widely cross-doped and chemically connected. The Ni2P/MoS2 with N-doped carbon displays comparable HER performance as Pt/C in acidic media.

In Situ Atomic Force Microscopy of the Reconfiguration of On-Surface Self-Assembled DNA-Nanoparticle Superlattices

  • First Published: 04 January 2019
Description unavailable

The reconfiguration of DNA-linked substrate-supported nanoparticle assemblies in response to ethanol added to the aqueous solution is studied using in situ atomic force microscopy. In situ imaging directly shows the changes to the monolayer superlattice during ethanol-induced contraction and expansion. A statistical analysis of the interparticle spacings reveals hysteresis in the lattice parameter due to the nanoparticle–substrate DNA bonding.

Controlling Ambipolar Charge Transport in Isoindigo-Based Conjugated Polymers by Altering Fluorine Substitution Position for High-Performance Organic Field-Effect Transistors

  • First Published: 24 January 2019
Description unavailable

A copolymer of isoindigo (IIG) and oFT2 (PIIG-oFT2) is synthesized. The oFT2 unit reduces the lowest unoccupied molecular orbital energy level and increases the planarity of the IIG-based copolymer. These electronic and structural changes in PIIGoFT2 provide perfectly balanced ambipolar transport (μhe = 1) for organic field-effect transistors, and the current best ambipolar complementary-like inverter with a gain of 21 is fabricated.

Cancer Stem Cell-Platelet Hybrid Membrane-Coated Magnetic Nanoparticles for Enhanced Photothermal Therapy of Head and Neck Squamous Cell Carcinoma

  • First Published: 20 January 2019
Description unavailable

A natural cancer stem cell-platelet hybrid mimic membrane is collected from tumor-bearing mice and further used for magnetic nanoparticle coating. The obtained biomimetic nanoparticles are then injected into the same mice for magnetic resonance imaging and photothermal therapy. The work presents a novel design strategy for personalized cancer theranostics.

Toward the Optimized Spintronic Response of Sn-Doped IrO2 Thin Films

  • First Published: 21 January 2019
Description unavailable

Ir1-xSnxO2 is proposed to be the most promising material for spin current detection to date. Its electrical resistivity is proven to be tunable over several orders of magnitude while the system remains in a strong spin–orbit coupling regime, thus optimizing the two key properties involved in the spin-detection process.

Atomic Ni Anchored Covalent Triazine Framework as High Efficient Electrocatalyst for Carbon Dioxide Conversion

  • First Published: 20 January 2019
Description unavailable

Atomically dispersed NiN4 centers are rationally designed into a porous organic skeleton through an ionothermal approach. The as-prepared porous materials are applied as electrocatalysts for carbon dioxide conversion and exhibit high carbon dioxide reduction selectivity toward CO production as well as long-term stability.

Surface Regulation Towards Stimuli-Responsive Luminescence of Ultrasmall Thiolated Gold Nanoparticles for Ratiometric Imaging

  • First Published: 21 January 2019
Description unavailable

Nucleophilic amines tend to closely bind the electrophilic gold surface, generating a high-energy emission from the intrinsically low-energy emitting gold nanoparticles (AuNPs). The electrophilic surface of the AuNPs provides an efficient pathway for direct electron donation to the gold surface from amines. Both the emissions show a unique amine concentration-dependent ratiometric pattern for quantitative assessments of biogenic amines.

Degradation Mechanism and Stability Improvement Strategy for an Organic Laser Gain Material 4,4′-Bis[(N-carbazole)styryl]biphenyl (BSBCz)

  • First Published: 21 January 2019
Description unavailable

Photodegradation of a laser gain material 4,4′-bis[(N-carbazole)styryl]biphenyl (BSBCz) is based on instability of the triplet excited states. Incorporation of 9,10-di(naphtha-2-yl)anthracene (ADN) into BSBCz films makes it possible to remove the unstable triplets, with radiative singlets of BSBCz being intact. This triplet managing method can greatly improve the excited-state stability of BSBCz films under both optical and electrical excitations.

Toward Chirality-Encoded Domain Wall Logic

  • First Published: 22 January 2019
Description unavailable

Magnetic logic devices where data are encoded within the winding of chiral domain walls are proposed. High-resolution magnetic imaging techniques are used to show the feasibility of the NOT, AND, NAND, OR, and NOR gates. The work lays the ground for new forms of magnetic devices where domain walls are used to carry, rather than merely delineate information.

Plasmon-Enhanced Fluorescent Sensor based on Aggregation-Induced Emission for the Study of Protein Conformational Transformation

  • First Published: 20 January 2019
Description unavailable

9,10-bis[2-(6-sulfonatopropoxyl)naphthylethenyl]anthracene (BSNVA) molecules with aggregation-induced emission performance are introduced into a plasmon-enhanced fluorescence system to build a hybrid sensor, and the fluorescence intensity of BSNVA is enhanced by the core–shell gold nanocube. Based on the specific recognition of proteins by the aptamer and the interaction between the protein and BSNVA, the sensor is applied to turn-on detection of prion proteins and monitor its conformational transformation.

Self-Assembly of Therapeutic Peptide into Stimuli-Responsive Clustered Nanohybrids for Cancer-Targeted Therapy

  • First Published: 23 January 2019
Description unavailable

A strategy for clinical translation of therapeutic peptides by assembling them into a stable peptide–Au nanohybrid, followed by further self-assembling into higher-order nanoclusters with responsiveness to the tumor microenvironment, is presented. An anticancer peptide termed β-catenin/Bcl9 inhibitor is assembled into a cluster of nanohybrids termed pCluster, which potently inhibits tumor growth as well as metastasis, and synergizes with immunotherapy, while maintaining a highly favorable biosafety profile.

Thermochromic Lead-Free Halide Double Perovskites

  • First Published: 20 January 2019
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Thermochromic lead-free double perovskites that have potential applications in smart windows and temperature sensors are demonstrated. The anharmonic fluctuations and associated strong electron–phonon coupling, combined with the spin–orbit coupling effect, are responsible for the thermochromism. The findings on the structure modulation-induced bandgap narrowing of Cs2AgBiBr6 provide new insights for the development of optoelectronic devices based on double perovskites.

Highly Bendable and Rotational Textile Structure with Prestrained Conductive Sewing Pattern for Human Joint Monitoring

  • First Published: 22 January 2019
Description unavailable

A textile-based highly bendable and rotational strain sensor that consists of three different patterns (straight, blind, and zigzag) of conductive yarn and textile substrates is optimized for precisely sensing motions of the human joints. The prestrained textile strain sensor is capable of outputting selective signals by programming the starting point of sensing.

Thermodynamically Controlled Self-Assembly of Hierarchically Staggered Architecture as an Osteoinductive Alternative to Bone Autografts

  • First Published: 28 January 2019
Description unavailable

A bone-like hierarchically staggered nanostructure is reproduced in vitro under thermodynamic control, in which a high-energy intermediate selectively transports calcium ions into collagenous gap regions via an energetically downhill process. The staggered architecture offers a bone-specific microenvironment for cell homing and multidifferentiation, andinduces endogenous bone regeneration with structural and functional characteristics similar to native bone/marrow.