We report a general approach toward dispersing single-walled carbon nanotubes (SWNTs) in solvents and polymer materials, by encapsulating SWNTs within cross-linked micelles. Micelles made from polystyrene-block-poly(acrylic acid) (PS-b-PAA), an amphiphilic block copolymer, are first assembled around gradually adding H2O to suspension of dimethylformamide. The hydrophilic, outer shells these micelles then chemically with difunctional linker molecule. Pure encapsulated (e-SWNTs) can be...

Plated gold: Self-assembly of core/shell nanostructures occurs spontaneously when gold nanoparticles are combined with amphiphilic block copolymers. Polymer cross-linking then topologically fixes the composite nanostructure (see picture). The thickness polymer shell, as well optical and chemical properties nanostructure, precisely determined by molecular characteristics assembled copolymer.

Quasi-amorphous colloidal structures exhibiting angle-independent tunable photonic colors in response to the electric stimuli. Moderately polydisperse Fe3O4@SiO2 nanoparticles dispersed organic solvents exclusively form quasi-amorphous materials at sufficiently high concentrations, and which reversibly reflect incident light visible region relatively low bias voltages.

A variety of fish and cephalopods use tunable 1D photonic crystals to signal display information. These animals control the color reflectors through chemical secretion by sympathetic nervous system, which reduces distance between platelets in reflective cells. This can be mimicked a bioinspired, block copolymer that is made (see figure) production species electrochemistry. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed,...

Colloidal perovskite nanocrystals based on formamidinium lead halide (FAPbX3) have been synthesized by the ligand-assisted reprecipitation method using PbX2–dimethyl sulfoxide complexes as precursors at room temperature. Well-defined cubic-shaped FAPbX3 obtained with a size d of ∼10 nm. The show bright photoluminescence high quantum yield (75% for FAPbBr3). lifetimes FAPbBr3 were measured samples isolated several different centrifugal speeds. can be tuned from blue to near-infrared region...

Inkjet-assisted nanotransfer printing (inkjet-NTP) facilitates spatial control of many arrays various organic functional materials on a single substrate with high-throughput integration process, enabling monolithic nanopatterns. Inkjet-NTP enables wafer-scale electronic circuits composed field-effect transistors, complementary inverters, and p–n diodes, demonstrating its capability to produce high-performance, multifunctional chip. As service our authors readers, this journal provides...

When Au nanoparticles are encapsulated within shells of cross-linked, block copolymer amphiphiles, the structure is determined by initial interaction between amphiphile and nanoparticle surface. In case small nanoparticles, for which particle size comparable to dimension (ρAu/Rg ≈ 1), particles act like solutes that dissolved polystyrene-block-poly(acrylic acid) (PS-b-PAA) micelle cores. larger > PS-b-PAA adsorption templated surface, a concentric core−shell formed. The thickness this shell...

Au nanoparticles encapsulated within polystyrene-block-poly(acrylic acid) (PS-b-PAA) micelles assemble into regular, one-dimensional arrays when they are exposed to solvent conditions that relax interfacial curvature in the micellar shell. Nanoparticle chaining was induced by adding salt, acid, or cationic carbodiimide suspension of purified (Au@PS-b-PAA). The resulting assemblies were characterized scanning and transmission electron microscopies, dark-field optical microscopy, visible...

We report a facile way of fabricating hybrid organic/inorganic photonic gels by selective swelling and subsequent infiltration SiO(2) into one type lamellar microdomain previously self-assembled from modest-molecular-weight block copolymers. Transparent, in-plane films were first prepared assembly polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP), subsequently the P2VP domains swollen with solvent, methanol. The structures then fixated synthesizing nanoparticles within domains. resulting...

Owing to their stimulus responsive color changing properties, polydiacetylenes (PDAs) have been extensively investigated as colorimetric sensors. Thermochromic properties of PDAs the central focus a number investigations that were aimed not only at gaining fundamental understanding physical basis change but also developing practical applications temperature The thermochromic transition PDA polymer is closely related melting point corresponding diacetylene (DA) monomer. In addition, majority...

Efficiency roll-off is a significant issue in blue light-emitting diodes (LEDs), but its origin still remains controversial.

Recently, thermoset vitrimer polymers have shown significant promise for structural applications because of their ability to be reshaped and remolded due covalent adaptive network (CAN). In these vitrimers, the transesterification reaction is responsible CAN, where efficiency controlled either by organic or organometallic catalysts. Understanding mechanism in bulk phase using direct experimental techniques extremely difficult highly cross-linked complex structure thermosetting vitrimers....

Abstract Polystyrene‐ block ‐poly(2‐vinyl pyridine) (PS‐ b ‐P2VP) copolymer photonic gels are fabricated that exhibit controllable optical hysteresis in response to a cyclic pH sweep. The is tuned by controlling the ion‐pairing affinity between various anions and protonated pyridinium ions on P2VP block, which highly dependent hydration energy of ions, dielectric constant solvent, ionic strength medium. coercivity defining magnitude could be varied from 0.26 7.4. Photonic gel films with...

Plastic pixels: Electrically tunable photonic pixels exhibiting nonvolatile colors are demonstrated by coupling the hysteretic optical properties of PS-b-P2VP block copolymer gels with an electrochemically induced pH gradient. The volatility was tuned controlling hysteresis strength and conversion value, which were both highly dependent on species anions pairing pyridinium groups. Detailed facts importance to specialist readers published as "Supporting Information". Such documents...

A simple and efficient method to enhance the quaternary nitrogen doping (N-doping) of graphene has been demonstrated. Recent studies have shown that N in network provides more electrocatalytic activity. Therefore, a novel strategy N-doping is currently high demand. The employed this work was modify oxide (GO) prior thermal annealing so as provide structure for doping. GO first chemically reduced with hydrazine substantially increase formation CC bonds simultaneously decrease atomic oxygen...

In the past decade, lead halide perovskite nanocrystals or quantum dots (QDs) have attracted keen interest due to their potential applications in many optoelectronic systems. addition, all-inorganic (CsPbX3) QDs are suggested be efficient single photon emitting centers. Herein, we study emission properties of recently synthesized organic–inorganic FAPbBr3 QDs. Our results show that individual can act as good single-photon sources with very low multiphoton probability achieved by extremely...

Developing stable perovskite nanocrystals (NCs) with enhancing luminescent properties holds great importance for future potential applications in optoelectronics. Here, we engaged NCs Cu2+ ion-based metal-organic framework (MOF) Cu-BTC (BTC = 1,3,5-benzene tricarboxylate) by physical mixing of MOF CsPbBr3 toluene solution. MOF-protected achieved high photoluminescence quantum yield 96.51% than pristine state (51.66%). Along the improvement optical properties, long-term stability solution...

We present the self-healing of defects and enhanced crystallinity in uniaxially aligned poly(3-hexylthiophene) (P3HT) crystal via molecular doping with F4TCNQ. Using eutectic friction transfer (EFT), highly P3HT films (P3HT EFT )...

Thermal transport in aqueous suspensions of Au-core polymer-shell nanoparticles is investigated by time-resolved measurements optical absorption. The addition an organic cosolvent to the suspension causes polystyrene component polymer shell swell, and this change microstructure increases effective thermal conductivity a factor approximately 2. corresponding time scale for cooling nanoparticle decreases from 200 ps 100 ps. threshold concentration that creates changes conductivity, 5 vol %...

We fabricated cross-stacked organic p-n nanojunction arrays made of single-crystal 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-PEN) and fullerene (C60) nanowires as p-type n-type semiconductors, respectively, by using a nanotransfer printing technique. Single-crystal C60 were synthesized inside nanoscale channels mold directly transferred onto desired position flexible substrate lubricant liquid layer. In the consecutive process, TIPS-PEN grown in same way then perpendicularly aligned...