Super sensitive, not so silly, putty Many composites blend stiff materials, such as glass or carbon fibers, into a softer elastic polymer matrix to generate material with better overall mechanical toughness. Boland et al. added graphene lightly cross-linked silicone (also known Silly Putty). The resulting composite has unusual properties, allowing the manufacture of strain sensors that can detect respiration and footsteps spiders. Science , this issue p. 1257

Raman spectroscopy is now an extremely important technique for the analysis of carbon-based materials. It demonstrated how it can be used to give a unique insight into characterising many aspects microstructure these materials, including orientation, number layers, defects and doping, enabling standardisation quality control. Graphene, as building block all sp2 carbon materials main example understanding this material has facilitated nanotubes fibres. also shown that bands shift during...

This in-depth review deals with the subject of how mechanical reinforcement takes place in polymer nanocomposites containing graphene and carbon nanotubes offers guidelines for maximization performance such systems.

Conductive inks for the future printed electronics should have following merits: high conductivity, flexibility, low cost, and compatibility with wide range of substrates. However, state-of-the-art conductive based on metal nanoparticles are in cost poor flexibility. Herein, we reported a highly conductive, super flexible ink graphene nanoplatelets. The has been screen-printed plastic paper Combined postprinting treatments including thermal annealing compression rolling, pattern shows...

Liquid- phase exfoliation (LPE) is the principal method of producing two-dimensional (2D) materials such as graphene in large quantities with a good balance between quality and cost now widely adopted by both academic industrial sectors. The fragmentation mechanisms involved have usually been simply attributed to force induced ultrasound interaction solvent molecules. Nonetheless, little known about how they actually occur, i.e., thick graphite crystals can be exfoliated into thin small...

The fundamental aspects, photocatalytic applications and ways to enhance the performance of spinels are systematically reviewed in this paper.

A carbon nanotube film (see Figure) can be used as a strain sensor at the macroscale, due to dependence of electrical properties single‐walled nanotubes on mechanical deformation nanoscale.

The spatial orientation of the reinforcing elements in polymer-based composites plays a vital role controlling mechanical properties but there is no generally-accepted way quantifying at nanoscale plate-like fillers nanocomposites. A previous study found that intensity scattering Raman band dependent on axis laser polarization when beam parallel to surface graphene plane and demonstrated this could be used quantify graphene. Based approach, polarized spectroscopy here quantify, as an...

Raman spectroscopy has been used for the first time to monitor interfacial stress transfer in poly(vinyl alcohol) nanocomposites reinforced with graphene oxide (GO). The were prepared by a simple mixing method and casting from aqueous solution. They characterized using scanning electron microscopy, X-ray diffraction, polarized their mechanical properties determined tensile testing dynamic thermal analysis. It was found that GO fully exfoliated during nanocomposite preparation process...

The deformation of monolayer graphene, produced by chemical vapor deposition (CVD), on a polyester film substrate has been investigated through the use Raman spectroscopy. It found that microstructure CVD graphene consists hexagonal array islands flat separated wrinkled material. During deformation, it was rate shift 2D band wavenumber per unit strain less than 25% flakes mechanically exfoliated whereas broadening about 75% This unusual behavior modeled in terms isolated wrinkles, with...

Polarized Raman spectroscopy has been employed to characterize transverse sections of graphene monolayers upon both a copper substrate and polyester film. Well-defined spectra can be obtained from the one atom thick because strong resonance scattering. The intensity 2D band (I2D) is independent axis laser polarization when beam perpendicular surface monolayer but I2D found vary as approximately 4th power cosine angle between plane direction propagation parallel sheet. It demonstrated that...

Hollow carbon nanospheres decorated with Co_xNi_1−xMoO₄ nanosheets showed extraordinary rate performance and cycling stability as electrodes in supercapacitors.

Abstract Textile thermoregulation and thermal protection are crucial for human health safety. Individual thermophysiological comfort control flame retardancy lacking in traditional garments. Novel nanomaterial innovations have solved these limitations facilitated the development of next‐generation intelligent textiles. Smart textiles based on graphene derivatives material attracted substantial attention owing to its superior electrical conductivity, high flexibility. This review provides an...

Poly(ether ether ketone) (PEEK), with its superb mechanical properties, excellent chemical resistance and high thermo-oxidative stability is one of the most important engineering thermoplastics for high-end applications. In this work, we investigate elastic viscoelastic properties along creep mitigation two sets samples: PEEK reinforced graphene nanoplatelets (GNPs) a hybrid graphene/short carbon fibre (CF) filler. The melt viscosity nanocomposites was found to increase increasing GNPs...

Nanocomposite strain sensors, particularly those consisting of polymer-graphene composites, are increasingly common and great interest in the area wearable sensors. In such application yields an increase resistance due to effect deformation on interparticle junctions. Typically, widening separation is thought junction by reducing probability tunnelling between conducting particles. However, alternative approach would be use piezoresistive fillers, where applied modifies intrinsic filler so...

The development of scalable Out-of-Autoclave (OoA) in-situ thermoset curing methods are required to overcome important drawbacks related the autoclave-based processing typically used in industry. incorporation graphene, an electrothermal carbon nanomaterial with ability transform electric energy into heat through Joule heating, emerges as a promising route replace conventional methods. In this work electrical behaviour both uncured and oven cured GNPs/epoxy composites loadings up 10 wt% were...

The high mechanical strength and excellent flexibility of 2D materials such as graphene are some their most important properties [1]. Good is key for exploiting in many emerging technologies, wearable electronics, bioelectronics, protective coatings composites [1] recently bending has been suggested a route to tune electronic transport behaviour [2]. For virtually all crystalline macroscopic deformation accommodated by the movement dislocations through formation twinning defects [3]; it...

Abstract There has been a massive growth in the study of transition metal dichalcogenides (TMDs) over past decade, based upon their interesting and unusual electronic, optical mechanical properties, such as tuneable strain-dependent bandgaps. Tungsten disulphide (WS 2 ), typical example TMDs, considerable potential applications strain engineered devices next generation multifunctional polymer nanocomposites. However, controlling strain, or more practically, monitoring WS associated...

We demonstrate a facile and scalable electrochemical approach to exfoliate graphite, which permits in situ hydrogenation of the resultant graphene via solvated NR4+ graphite compound quaternary ammonium-based deep eutectic solvents. Spectroscopic studies reveal presence sp3 C–H bonds hydrogenated graphene. The resulting materials consist micrometre-sized predominantly monolayer few layers thick graphenic flakes. A large band gap (∼4 eV) further establishes high level hydrogenation. It is...

The mechanical behavior of a prototype touch panel display, which consists two layers CVD graphene embedded into PET films, is investigated in tension and under contact-stress dynamic loading. In both cases, laser Raman spectroscopy was employed to assess the stress transfer efficiency layers. tensile found be governed by "island-like" microstructure graphene, dependent on size "islands" but also yielding at relatively high strains. Finally, fatigue tests, simulate real operation conditions,...

The effect of simultaneous alignment polyethylene (PE) lamellae and graphene nanoplatelets (GnP) on the thermal conductivity (k) PE-GnP composites is investigated. Measurements reveal a large increase 1100% in k aligned composite using 10 wt% GnPs relative to unoriented pure PE. rate with applied strain for GnP found be almost factor two higher than PE sample, pointing beneficial enhancement. Aligned are further 3 times as effective enhancing randomly oriented configuration. Enhancement...