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Themed collection 2014 Journal of Materials Chemistry C Hot Articles

41 items
Open Access Highlight

Recent twists in photoactuation and photoalignment control

The design of functional and stimuli-responsive materials is among the key goals of modern materials science.

Graphical abstract: Recent twists in photoactuation and photoalignment control
Application

Carbon nanotube based elastomer composites – an approach towards multifunctional materials

The current study focuses on giving a basic understanding of tubular graphene sheets or carbon nanotubes (CNTs) and points towards their role in fabricating elastomer composites.

Graphical abstract: Carbon nanotube based elastomer composites – an approach towards multifunctional materials
Feature Article

Nitrogen heterocycle-containing materials for highly efficient phosphorescent OLEDs with low operating voltage

Recent advances in nitrogen heterocycle-containing materials used for phosphorescent OLEDs with high efficiencies and low operating voltages are reviewed.

Graphical abstract: Nitrogen heterocycle-containing materials for highly efficient phosphorescent OLEDs with low operating voltage
Feature Article

Epitaxial growth of GaN films on unconventional oxide substrates

The unconventional oxide substrates have been used for the growth of high-quality GaN films due to their relatively small lattice and thermal expansion coefficient mismatches with GaN. This review focuses on the recent progress and discusses the perspectives of the epitaxial growth of GaN films on unconventional oxide substrates.

Graphical abstract: Epitaxial growth of GaN films on unconventional oxide substrates
Feature Article

Fluorescent Au nanoclusters: recent progress and sensing applications

This paper reviews recent advances and challenges in the use of fluorescent Au nanoclusters for sensing applications, with an emphasis on the various mechanisms of sensing.

Graphical abstract: Fluorescent Au nanoclusters: recent progress and sensing applications
Feature Article

Optical sensing of biological, chemical and ionic species through aggregation of plasmonic nanoparticles

This feature article summarizes the progress and future directions of various optical methods (colorimetry, SERS, photoluminescence, light scattering, and chiroptical activity) for the detection of biological, chemical and ionic species based on the aggregation of plasmonic NPs.

Graphical abstract: Optical sensing of biological, chemical and ionic species through aggregation of plasmonic nanoparticles
Open Access Feature Article

Carbon quantum dots: synthesis, properties and applications

Carbon quantum dots (CQDs, C-dots or CDs), which are generally small carbon nanoparticles (less than 10 nm in size) with various unique properties, have found wide use in more and more fields during the last few years. In this feature article, we describe the recent progress in the field of CQDs, focusing on their synthetic methods, size control, modification strategies, photoelectric properties, luminescent mechanism, and various applications.

Graphical abstract: Carbon quantum dots: synthesis, properties and applications
Feature Article

Graphene–organic composites for electronics: optical and electronic interactions in vacuum, liquids and thin solid films

Describing all the optical and electronic interactions of graphene with poly-aromatic molecules and polymers for electronic devices.

Graphical abstract: Graphene–organic composites for electronics: optical and electronic interactions in vacuum, liquids and thin solid films
From the themed collection: Emerging Investigators
Feature Article

Polystyrene Kerr nonlinear photonic crystals for building ultrafast optical switching and logic devices

In recent years all-optical switching and logic devices have received extensive attention due to their potential applications in next generation ultrahigh-speed information processing and optical computing.

Graphical abstract: Polystyrene Kerr nonlinear photonic crystals for building ultrafast optical switching and logic devices
Feature Article

Metal ions optical sensing by semiconductor quantum dots

This feature article highlights different sensing strategies with chemically modified quantum dots (QDs) hybrid structures for the sensing of metal ions in aqueous solution or an in vivo environment, and discusses the photophysical mechanisms in the different sensor systems while comparing their detecting/sensing selectivity.

Graphical abstract: Metal ions optical sensing by semiconductor quantum dots
Communication

An acid-free medium growth of rutile TiO2 nanorods arrays and their application in perovskite solar cells

TiO2 nanorods hydrothermally prepared from acid-free media show potential as the building blocks of perovskite solar cells.

Graphical abstract: An acid-free medium growth of rutile TiO2 nanorods arrays and their application in perovskite solar cells
Communication

Hard–soft synthesis of a new series of vacancy-ordered perovskites, CaCrO3−δ

New CaCrO3−δ superstructure phases (δ = 0.33, 0.4, and 0.5) have been discovered through ‘soft’ low temperature reduction of the perovskite CaCrO3 made at ‘hard’ high pressure–temperature conditions.

Graphical abstract: Hard–soft synthesis of a new series of vacancy-ordered perovskites, CaCrO3−δ
Communication

Organic light emitting diodes with environmentally and thermally stable doped graphene electrodes

Metal oxides allow a strong and stable p-type doping and interface modification of graphene electrodes for highly efficient OLEDs.

Graphical abstract: Organic light emitting diodes with environmentally and thermally stable doped graphene electrodes
Communication

Enhancement of mechanical stability in hydrogen-bonded photomobile materials with chemically modified single-walled carbon nanotubes

Hydrogen-bonded photomobile liquid-crystalline polymer fibers with chemically modified single-walled carbon nanotubes were prepared and their photomobile properties were investigated.

Graphical abstract: Enhancement of mechanical stability in hydrogen-bonded photomobile materials with chemically modified single-walled carbon nanotubes
Communication

A highly luminescent chameleon: fine-tuned emission trajectory and controllable energy transfer

A strategy was proposed to control the energy transfer process in a mixed-lanthanide MOF. A novel white-light emission material is thus designed, whose emission can be reversibly switched between blue, white and yellow.

Graphical abstract: A highly luminescent chameleon: fine-tuned emission trajectory and controllable energy transfer
Paper

Mechanofluorochromic behaviors of β-iminoenolate boron complexes functionalized with carbazole

New β-iminoenolate boron complexes exhibit different mechanofluorochromic properties due to the excimer and monomer transformation.

Graphical abstract: Mechanofluorochromic behaviors of β-iminoenolate boron complexes functionalized with carbazole
Paper

Piezoelectricity of lead-free (K, Na)NbO3 nanoscale single crystals

PFM characterization of (K, Na)NbO3 nanoscale single crystals reveals the piezoelectric composition dependence and the existence of a phase boundary.

Graphical abstract: Piezoelectricity of lead-free (K, Na)NbO3 nanoscale single crystals
Paper

Interplay of alternative conjugated pathways and steric interactions on the electronic and optical properties of donor–acceptor conjugated polymers

Orthogonally conjugated moieties appended to a conjugated polymer backbone are used to control solubility and packing. Here, electronic-structure calculations show how such configurations impact the polymer geometry and the electronic/optical properties.

Graphical abstract: Interplay of alternative conjugated pathways and steric interactions on the electronic and optical properties of donor–acceptor conjugated polymers
Paper

A zigzag DyIII4 cluster exhibiting single-molecule magnet, ferroelectric and white-light emitting properties

A zigzag-shaped DyIII4 cluster, [Dy4(μ-bpt)4(μ-OH)2(NO3)6(EtOH)2]·EtOH was designed and synthesized solvothermally, which displays multiple properties of single-molecule magnets, ferroelectricity and white-light emission.

Graphical abstract: A zigzag DyIII4 cluster exhibiting single-molecule magnet, ferroelectric and white-light emitting properties
Paper

An electrodeposited lanthanide MOF thin film as a luminescent sensor for carbonate detection in aqueous solution

A luminescent lanthanide MOF-based thin film was fabricated by electrodeposition in an anhydride system and this film can be used as a highly selective sensor for CO32− in aqueous solution.

Graphical abstract: An electrodeposited lanthanide MOF thin film as a luminescent sensor for carbonate detection in aqueous solution
Paper

Photophysical properties of ionic liquid-assisted porphyrin nanoaggregate–nickel phthalocyanine conjugates and singlet oxygen generation

Porphyrin nanoaggregates for singlet oxygen generation.

Graphical abstract: Photophysical properties of ionic liquid-assisted porphyrin nanoaggregate–nickel phthalocyanine conjugates and singlet oxygen generation
Open Access Paper

Revealing the origin of magnetoresistance in unipolar amorphous organic field-effect transistors

Magnetoresistance in a unipolar p-channel field-effect transistor based on low molecular weight 2,2′,7,7′-tetrakis(diphenylamino)-9,9′-spirobifluorene (Spiro-TAD) is reported.

Graphical abstract: Revealing the origin of magnetoresistance in unipolar amorphous organic field-effect transistors
Paper

Photomechanical response of polymer-dispersed liquid crystals/graphene oxide nanocomposites

Recyclable, fast and visible-light responsive polymer-dispersed liquid crystal/graphene oxide nanocomposite films were fabricated by solution casting and mechanical stretching.

Graphical abstract: Photomechanical response of polymer-dispersed liquid crystals/graphene oxide nanocomposites
Paper

Fabrication of metamaterial absorber using polymer brush – gold nanoassemblies for visualizing the reversible pH-responsiveness

Metamaterial absorber is fabricated using polymer brush–gold nanoassemblies for visualizing the reversible pH-responsiveness.

Graphical abstract: Fabrication of metamaterial absorber using polymer brush – gold nanoassemblies for visualizing the reversible pH-responsiveness
Paper

Self-assembled buffer layer from conjugated diblock copolymers with ethyleneoxide side chains for high efficiency polymer solar cells

A remarkable improvement of 7.3% in the PCE is obtained through the spontaneous migration of diblock copolymers during the spin-coating process.

Graphical abstract: Self-assembled buffer layer from conjugated diblock copolymers with ethyleneoxide side chains for high efficiency polymer solar cells
Paper

Phosphorescent oxygen sensors produced by spot-crazing of polyphenylenesulfide films

Phosphorescent oxygen sensors produced by localised solvent-crazing of polyphenylene sulphide films are described.

Graphical abstract: Phosphorescent oxygen sensors produced by spot-crazing of polyphenylenesulfide films
Paper

Getting real: influence of structural disorder on the performance of plasmonic hole array sensors fabricated by a bottom-up approach

Periodic hole arrays in gold films showing extraordinary transmission of light are fabricated using solely chemical methods. The degree of order of the hole arrays has a strong impact on their transmission properties, which can be utilized for a spectral quality control of the produced plasmonic sensors.

Graphical abstract: Getting real: influence of structural disorder on the performance of plasmonic hole array sensors fabricated by a bottom-up approach
Paper

Effect of head group size on the photoswitching applications of azobenzene Disperse Red 1 analogues

We investigate the effect of the increased molecular bulk in the ‘head’ group for a class of newly synthesized azobenzene chromophores and demonstrate that motifs with larger free-volume changes during isomerization drive photoinduced macromolecular phenomena.

Graphical abstract: Effect of head group size on the photoswitching applications of azobenzene Disperse Red 1 analogues
Paper

CrXTe3 (X = Si, Ge) nanosheets: two dimensional intrinsic ferromagnetic semiconductors

Proposal of two-dimensional CrXTe3 (X = Si, Ge) nanosheets with intrinsic ferromagnetism and half semiconductor character.

Graphical abstract: CrXTe3 (X = Si, Ge) nanosheets: two dimensional intrinsic ferromagnetic semiconductors
Paper

Multi-color emission evolution and energy transfer behavior of La3GaGe5O16:Tb3+,Eu3+ phosphors

Color-tunable green-red emitting La3GaGe5O16:Tb3+,Eu3+ phosphors were prepared and the energy transfer process was discussed.

Graphical abstract: Multi-color emission evolution and energy transfer behavior of La3GaGe5O16:Tb3+,Eu3+ phosphors
Paper

Photo-switching of magnetization in iron nanoparticles

We report the theoretical study of the light-induced switching of magnetization in core–shell nanoparticles.

Graphical abstract: Photo-switching of magnetization in iron nanoparticles
Paper

Electronic transition responsible for size-dependent photoluminescence of colloidal CuInS2 quantum dots

Photoluminescence of CuInS2 QDs was attributed to the recombination of electrons in the donor level of indium at copper sites or sulfur vacancies and holes in the quantized hole state.

Graphical abstract: Electronic transition responsible for size-dependent photoluminescence of colloidal CuInS2 quantum dots
Paper

Os(II) metal phosphors bearing tridentate 2,6-di(pyrazol-3-yl)pyridine chelate: synthetic design, characterization and application in OLED fabrication

Os(II) complexes bearing tridentate pz2py chelate were synthesized, among which the derivative with two extra phosphine ligands is found to be an excellent yellow dopant for OLEDs.

Graphical abstract: Os(ii) metal phosphors bearing tridentate 2,6-di(pyrazol-3-yl)pyridine chelate: synthetic design, characterization and application in OLED fabrication
Paper

Molecular design for a cybotactic nematic phase

We propose two molecular designs for a cybotactic nematic (Ncyb) phase. The U-shaped compound exhibits a skewed Ncyb phase, whereas the rod-like compound possessing a terminal hydroxyl group shows a normal Ncyb phase.

Graphical abstract: Molecular design for a cybotactic nematic phase
Paper

Rubicene: a molecular fragment of C70 for use in organic field-effect transistors

The field-effect hole mobility of rubicene having high ionization energy (∼5.5 eV) is 0.20 cm2 V−1 s−1 and is improved to 0.32 cm2 V−1 s−1 with PFBT SAM treatment which reduces the hole injection barrier and induces an edge-on configuration.

Graphical abstract: Rubicene: a molecular fragment of C70 for use in organic field-effect transistors
From the themed collection: Emerging Investigators
Paper

Impact of crystal orientation on the adsorption kinetics of a porous coordination polymer–quartz crystal microbalance hybrid sensor

The hybridization of porous coordination polymers (PCPs) with electronic devices is a powerful strategy for developing systems that are suitable for advanced applications, such as chemical sensing.

Graphical abstract: Impact of crystal orientation on the adsorption kinetics of a porous coordination polymer–quartz crystal microbalance hybrid sensor
From the themed collection: Emerging Investigators
Paper

Spin crossover composite materials for electrothermomechanical actuators

A composite bilayer actuator device which uses spin crossover to convert electrical energy into motion via Joule heating is described.

Graphical abstract: Spin crossover composite materials for electrothermomechanical actuators
Paper

Conformal phase masks made of polyurethane acrylate with optimized elastic modulus for 3D nanopatterning

A modulus-tunable conformal mold can serve as a semi-permanently usable optical phase mask for generating three-dimensional nanostructures with high uniformity.

Graphical abstract: Conformal phase masks made of polyurethane acrylate with optimized elastic modulus for 3D nanopatterning
Open Access Paper

Platinum(II) complexes with cyclometallated 5-π-delocalized-donor-1,3-di(2-pyridyl)benzene ligands as efficient phosphors for NIR-OLEDs

PtL2Cl (HL2 = 5-(p-(NPh2)styryl-1,3-di(2-pyridyl)benzene) emerges as an excellent candidate for the preparation of NIR-OLEDs.

Graphical abstract: Platinum(ii) complexes with cyclometallated 5-π-delocalized-donor-1,3-di(2-pyridyl)benzene ligands as efficient phosphors for NIR-OLEDs
Paper

Twisted intramolecular charge transfer, aggregation-induced emission, supramolecular self-assembly and the optical waveguide of barbituric acid-functionalized tetraphenylethene

A red-emissive barbituric acid-functionalized TPE luminogen with TICT, AIE, self-assembly and optical waveguiding properties was synthesized.

Graphical abstract: Twisted intramolecular charge transfer, aggregation-induced emission, supramolecular self-assembly and the optical waveguide of barbituric acid-functionalized tetraphenylethene
Paper

Versatile van der Waals epitaxy-like growth of crystal films using two-dimensional nanosheets as a seed layer: orientation tuning of SrTiO3 films along three important axes on glass substrates

Nanosheet seed layers of dangling bond-free nature can promote VDWE-like growth of crystal films with considerable mismatch, realizing advanced design in film deposition.

Graphical abstract: Versatile van der Waals epitaxy-like growth of crystal films using two-dimensional nanosheets as a seed layer: orientation tuning of SrTiO3 films along three important axes on glass substrates
41 items

About this collection

This on-going web collection features all the articles published in Journal of Materials Chemistry C in 2014 marked as HOT, as recommended by referees. A selection of these is posted weekly on the Journal of Materials Chemistry Blog. Congratulations to all the authors whose articles are featured!

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