The reaction between fluorinated single-wall carbon nanotubes (F-SWNTs) and branched (Mw = 600, 1800, 10000, 25000 Da) or linear polyethyleneimine (PEI) yields the covalent attachment of polymer to sidewalls nanotubes. resulting PEI-functionalized SWNTs (PEI-SWNTs) were characterized by solid-state 13C NMR, Raman spectroscopy, X-ray photoelectron UV–vis atomic force microscopy, transmission electron thermal gravimetric analysis studies. As expected, number molecules per SWNT is larger for...

We report a human-in-the-loop implementation of the multi-objective experimental design via Bayesian optimization platform (EDBO+) towards butylpyridinium bromide synthesis under continuous flow conditions. The algorithm simultaneously optimized reaction yield and production rate (or space-time yield) generated well defined Pareto front. versatility EDBO+ was demonstrated by expanding space mid-campaign increasing upper temperature limit. Incorporation techniques enabled improved control...

Ultrasmall copper nanoparticles are produced by N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPDA) reduction of aqueous Cu2+ on a hydrophobically immobilized sodium dodecylbenzenesulfonate (SDBS) surfactant template in the presence citrate at room temperature. Single-walled carbon nanotubes (SWNTs) act as scaffold controlling size SDBS micelle, which turn confines limited number ions near nanotube surface. TMPDA forms confirmed X-ray photoelectron spectroscopy and electron diffraction, whose...

The performance of aluminum nanomaterial based energetic formulations is dependent on the mass transport, diffusion distance, and stability reactive components. Here we use a biologically inspired approach to direct assembly oxidizer loaded protein cages onto surface nanoparticles improve reaction kinetics by reducing distance between reactants. Ferritin were with ammonium perchlorate (AP) or iron oxide assembled nAl create an oxidation-reduction first demonstration nanoscale biobased...

With growing interest in the development of new composite systems for a variety applications that require easily processable materials and adequate structural properties with high energy densities, we have pursued chemical functionalization oxide-passivated aluminum nanoparticles (nAl) using three acrylic monomers, 3-methacryloxypropyltrimethoxysilane (MPS), 2-carboxyethyl acrylate (CEA), phosphonic acid 2-hydroxyethyl methacrylate ester (PAM), to provide compatibility within various solvent...

Organically capped metal nanoparticles are an attractive alternative to more conventional oxide-passivated materials, due the lower reaction temperatures and possibility of tuning organic coating. Sonochemical methods have been used produce small (∼5 nm average size) air-stable aluminum with oleic acid. In order understand nature metal−organic bonding in nanoparticles, we FTIR, XPS, TOFMS−TPD techniques study passivation layer its desorption at elevated temperatures. present case find that...

Carbon nanotubes (CNTs) have been grown using Fe, Co, Ni, and Co/Fe spin-on-catalyst (SOC) systems, involving the metal salt dispersed with a spin-on-glass precursor. During initial growth runs (CH4/H2/900 degrees C), CNT yield followed order Co-SOC > Fe-SOC >> Ni-SOC. The Fe catalysts produced longest at expense of larger average diameter broader distribution than system. A series Co/Fe-SOCs were prepared where as atomic percentage Co is increased nucleation increases but length decreases....

Cobalt–iron–oxide (Co–Fe–O) nanoparticles have been prepared by the thermal decomposition in benzyl ether of Fe(acac)3 and Co(acac)2 presence a mixture oleic acid oleylamine templating (surface capping) ligands, 1,2-hexadecanediol (HDD) as an accelerating agent. The Co percentage may be tuned adjusting amount precursor without influencing average particle size or distribution. Counter to prior reports HDD agent results broader nanoparticle diameter distribution; however, for smallest sizes...

Vertical arrays of single walled carbon nanotubes (VA-SWNTs) were grown using bi-metallic nanoparticle pro-catalysts. Iron oxide particles doped with varying quantities first row transition metals (Mn, Co, Ni, and Cu) for a comparative study the growth nanotubes. VA-CNT samples verified scanning electron microscopy, characterized resonance Raman spectroscopy. The length VA-CNTs is used as measure catalyst activity: presence dopants results in change CNT distribution. Cross correlation...

Aluminum nanoparticles and explosive formulations that incorporate them have been a subject of ongoing interest due to the potential aluminum particles dramatically increase energy content relative conventional organic explosives. We used time-resolved atomic molecular emission spectroscopy monitor combustion within overall chemical dynamics post-detonation fireballs. studied release hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) charges incorporating three types nanoparticles: commercial...

The synthetic conditions for the isolation of iron–molybdenum nanocluster FeMoC [HxPMo12O40⊂H4Mo72Fe30(O2CMe)15O254(H2O)98], along with its application as a catalyst precursor VLS growth SWNTs have been studied. As-prepared is contaminated Keplerate cage [H4Mo72Fe30(O2CMe)15O254(H2O)98] without Keggin [HxPMo12O40]n− template, however, pure may be accomplished by Soxhlet extraction EtOH. resulting EtOH solvate consistent replacement water ligands coordinated to Fe being substituted FeMoC-EtOH...

Surfactant-assisted high energy ball milling (HEBM) is a widely used technique for producing nanostructured magnetic materials with oleic acid (OA) being the most commonly utilized surfactant reported in literature to date. No conclusive explanation has been presented wide use of OA and only few studies have deviated from its use. boiling point 360 °C which presents issues complete removal after HEBM process. Exposing temperatures required known result grain growth oxidation. In other...

Synthetic hemozoin crystals (β-hematin) are assembled with aluminium nanoparticles (nAl) to create a nanomaterial composite that is highly energetic and reactive. The results here demonstrate rapidly oxidizes the nAl fuel release large amounts of energy (+12.5 ± 2.4 kJ g−1). As service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for online delivery, but not copy-edited or typeset. Technical support...

ABSTRACT A series of Diels–Alder (DA) crosslinked polymethacrylate networks covering a broad range glass‐transition temperatures ( T g ) was prepared to establish the relationship between and thermal decrosslinking behavior these networks. permanently uncrosslinked analogues were also better understand thermoset‐to‐thermoplastic transition occurring in DA at elevated temperatures. The network studied using dynamic mechanical analysis, which established an inverse ability. Differential...

In the present study, nano-flake SmCo <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> powders with typical flake thickness of 300 nm were prepared by high energy ball milling using valeric acid as a surfactant. order to remove surfactant as-milled heat treated in argon and effect annealing temperature on structural magnetic properties resulting powder was investigated. Partial (58%) nearly complete (96%) removal observed DSC after...

We report the preparation of poly(ionic) polymer-wrapped single-walled carbon nanotube dispersions for chemiresistive methane (CH

Photocurable self-healing elastomers are promising candidates for producing complex soft devices that can mend damage. However, the practicality of these materials is limited by reliance on external stimuli, custom synthesis, manual realignment, and multihour healing cycles. This paper introduces a tough 3D-printable hybrid acrylate/thiol-ene elastomer (prepared with commercially available precursors) exhibits nearly instantaneous damage repair in absence stimuli. rapid, hydrogen bond-driven...

Abstract Polyimides (PIs), known for their thermal resistance, chemical stability, and mechanical properties, are often considered challenging materials to process, resulting in limited commercial availability of PIs melt extrusion, injection molding, fused filament fabrication (FFF). Currently, material knowledge gaps prevent the ability rapidly produce parts from that can be used high strength elevated temperature applications. To address this, a novel, fully aromatic PI with thermotropic...

Films of the molybdenum-iron nanocluster [H x PMo 12O 40 subsetH 4Mo 72Fe 30(O 2CMe) 15O 254(H2O) 68] (FeMoC) were generated on gold via self-assembly technique using two divergent routes. The first route entails unfunctionalized FeMoC onto a preprepared carboxyl-terminated SAM gold. second involves preparation thiol-terminated functionalized clusters, which are then allowed to self-assemble bare surfaces. Monolayer films clusters attained both routes, with requiring shorter immersion times...

A series of Diels–Alder (DA) crosslinked polymethacrylate networks covering a broad range glass-transition temperatures (Tg) was prepared to establish the relationship between Tg and thermal decrosslinking behavior these networks. permanently uncrosslinked analogues were also better understand thermoset-to-thermoplastic transition occurring in DA at elevated temperatures. The network studied using dynamic mechanical analysis, which established an inverse ability. Differential scanning...