The effects of annealing and fullerene loading in regioregular poly(3-hexylthiophene) (P3HT) 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) based bulk heterojunction photovoltaics have been investigated. Under specific conditions, a combination morphological electronic factors can be brought to play achieve optimal filling factors, open-circuit voltage (Voc), short-circuit current density (Jsc). We demonstrate that this occurs at surprisingly low loadings PCBM temperatures nearing the...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTStrong Luminescence of Solubilized Carbon NanotubesJason E. Riggs, Zhixin Guo, David L. Carroll, and Ya-Ping SunView Author Information Department Chemistry Center for Advanced Engineering Fibers Films Howard Hunter Laboratory Physics Astronomy, Kinard Clemson University, Clemson, South Carolina 29634 Cite this: J. Am. Chem. Soc. 2000, 122, 24, 5879–5880Publication Date (Web):June 2, 2000Publication History Received3 December 1999Published...

Truncated triangular silver nanoplates have been synthesized in large quantities using a solution phase method the presence of cetyltrimethylammonium bromide micelles. The obtained particles an average edge size 68 nm, thickness 24 and degree truncation 0.35. They are single crystals, with (111) lattice plane as basal plane. aqueous these displays clear red color due to strong in-plane dipole plasmon resonance peaked at 552 nm. These can self-assemble into chainlike nanostructures through...

A novel material for molecular optoelectronics consisting of a composite carbon nanotubes and poly(m-phenylenevinylene-co-2,5-dioctoxy-p-phenylenevinylene) (PmPV) is reported. Incorporation the demonstrated to increase electrical conductivity polymer by up eight orders magnitude. The appear act as nanometric heat sinks, preventing build large thermal effects, which degrade these conjugated systems. It also shown that can be used emissive layer in an organic light-emitting diode, promises...

Multipod gold nanocrystals have been synthesized via a simple solution-phase chemical reduction method at room temperature. Two types of structurally different particles are observed, including the regular tripod, which lies on substrate with its {111} plane, and cross-like tetrapod that sits {100} plane. Both structures pods 10 nm sizes grow along 110 directions. Variously shaped particles, tadpole-like or teardrop-like monopods, 90 degrees L-shaped, 180 I-shaped, 120 V-shaped bipods,...

Developing efficient, durable, and earth‐abundant electrocatalysts for both hydrogen oxygen evolution reactions is important realizing large‐scale water splitting. The authors report that FeB 2 nanoparticles, prepared by a facile chemical reduction of Fe 2+ using LiBH 4 in an organic solvent, are superb bifunctional electrocatalyst overall electrode delivers current density 10 mA cm −2 at overpotentials 61 mV reaction (HER) 296 (OER) alkaline electrolyte with Tafel slopes 87.5 52.4 dec −1 ,...

Multiwalled carbon nanotubes (MWCNTs) exhibit physical properties that render them ideal candidates for application as noninvasive mediators of photothermal cancer ablation. Here, we demonstrate use MWCNTs to generate heat in response near-infrared radiation (NIR) results thermal destruction kidney vitro and vivo. We document the effects therapy through magnetic resonance temperature-mapping shock protein-reactive immunohistochemistry. Our enables ablation tumors with low laser powers (3...

The authors have fabricated thin film polymer photovoltaics using 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C61 within regioregular poly(3-hexylthiophene) bulk heterojunction absorbing layers. Using thermal annealing at temperatures approaching the glass transition temperature, they examined formation of nanodomains matrix. These domains modify charge transport pathways in such a way as to allow for efficient use thicker This results nearly 20% gain overall performance this system with...

Thermoelectrics are materials capable of the solid-state conversion between thermal and electrical energy. Carbon nanotube/polymer composite thin films known to exhibit thermoelectric effects, however, have a low figure merit (ZT) 0.02. In this work, we demonstrate individual multiwalled carbon nanotubes (MWNT)/polyvinylidene fluoride (PVDF) that layered into multiple element modules resemble felt fabric. The voltage generated by these fabrics is sum contributions from each layer, resulting...

Highly efficient and stable electrocatalysts, particularly those that are capable of multifunctionality in the same electrolyte, high demand for hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR). In this work, highly monodisperse CoP Co2 P nanocrystals (NCs) synthesized using a robust solution-phase method. The exposed (211) crystal plane abundant surface phosphide atoms make NCs catalysts toward ORR HER, while metal-rich show higher OER performance owing to easier formation...

Abstract Freestanding, flexible/foldable, and wearable bifuctional ultrathin graphene paper for heating cooling is fabricated as an active material in personal thermal management (PTM). The promising electrical conductivity grants the superior Joule extra warmth of 42 °C using a low supply voltage around 3.2 V. Besides, based on its high out‐of‐plane conductivity, provides passive via transmission from human body to environment within 7 s. effect compared with that normal cotton fiber, this...

Abstract Solution‐grown films of CsPbBr 3 nanocrystals imbedded in Cs 4 PbBr 6 are incorporated as the recombination layer light‐emitting diode (LED) structures. The kinetics at high carrier density pure (extended) and nanoinclusion composite measured analyzed, indicating second‐order extended mainly first‐order confined , respectively. Analysis absorption strength this all‐perovskite, all‐inorganic nanocrystal relative to indicates enhanced oscillator consistent with earlier published...

Abstract Despite progress in small scale electrocatalytic production of hydrogen peroxide (H 2 O ) using a rotating ring-disk electrode, further work is needed to develop non-toxic, selective, and stable -to-H electrocatalyst for realizing continuous on-site neutral peroxide. We report ultrasmall monodisperse colloidal PtP nanocrystals that achieve H at near zero-overpotential with unity selectivity 0.27 V vs. RHE. Density functional theory calculations indicate P promotes hydrogenation OOH*...

A new form of silver nanostructured materials, nanodisks, are generated by a solution-phase approach. In this method, truncated triangular nanoplates at first fabricated through seed-mediated growth particles in the presence concentrated cetyltrimethylammonium bromide (CTAB). Subsequent aging obtained nanoplate solution 40 °C leads to formation nanodisks. Transmission electron microscopy and atomic force studies show that nanodisks have thickness order 20−30 nm diameter around 60 nm. X-ray...

Lipophilic and hydrophilic dendra which are terminated with long alkyl chains oligomeric poly(ethylene glycol) moieties, respectively, were synthesized, these dendron species used to functionalize single-wall (SWNT) multiple-wall (MWNT) carbon nanotubes via amidation esterification reactions. The functionalized nanotube samples are, depending on the functionalities, soluble in common organic solvents, such as hexane chloroform, water form colored homogeneous solutions. Characterizations...

Single-walled and multiwalled carbon nanotube blends with polyvinylidene difluoride (and its copolymers) have been characterized. The nanotubes are observed to form a well-dispersed, structurally random nanophase within the fluoropolymer matrix. X-ray analysis coupled differential scanning calorimetry suggests that alters crystal formation polymer. For most loadings types, piezoelectric β-polymorph is significantly enhanced over other phases. Solution-cast composite thin films exhibit...

Full and shortened single-walled multiple-walled carbon nanotubes were suspended in water to form stable suspensions the presence of a surfactant. Optical limiting properties determined for 532-nm pulsed laser irradiation, results comparable with those black aqueous suspension. Solubilization was achieved by attaching highly soluble poly(propionylethylenimine-co-ethylenimine) or functionalizing octadecylamine. The nanotube samples formed homogeneous solutions room-temperature chloroform....

Formation of a controlled fullerene mesophase within an organic host system has enabled us to create high-power conversion efficiency photovoltaics. This is formed using thermal gradients that provide fluidic mobility the fullerenes allowing for greater dispersion nanocrystalline 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C61 (PCBM) regioregular poly(3-hexylthiophene) (P3HT). From this reorganization component materials in matrix overall jumps dramatically from roughly 2.4% 5.2%.

Nanoparticles, including multiwalled carbon nanotubes (MWNTs), strongly absorb near-infrared (nIR) radiation and efficiently convert absorbed energy to released heat which can be used for localized hyperthermia applications. We demonstrate the first time that DNA-encasement increases emission following nIR irradiation of MWNTs, DNA-encased MWNTs safely eradicate a tumor mass in vivo. Upon is generated with linear dependence on laser power. resulted 3-fold reduction concentration required...

Silver nanoplates, with average thickness of 20−30 nm and size tunable from 40 to 300 nm, have been synthesized via a simple room-temperature solution-phase chemical reduction method in the presence appropriate concentrations cetyltrimethylammonium bromide (CTAB) silver seeds. On surface (111) basal plane these single-crystal nanoplates are adsorbed CTAB molecules, accounting for anisotropic formation plates their head-to-head self-assembled network superstructures. The size-sensitive...

Production of stable polymer−nanotube composites depends on good wetting interaction between polymer and nanotube, which is specific, in particular chain conformation. In this paper, we examine for a conjugated, semiconducting by range microscopic spectroscopic techniques, to gain greater understanding the binding. Several interesting effects are observed, including an order tendency defects nanotube structure nucleate crystal growth, substantial changes behavior due effect nanotubes This...

Soluble samples of single-wall and multiple-wall carbon nanotubes that are functionalized by lipophilic hydrophilic dendra can be defunctionalized in homogeneous solutions under base- acid-catalyzed hydrolysis reaction conditions. The results provide strong evidence for the ester linkages functionalization nanotubes.

We obtained improved poly(3-octylthiophene) (P3OT)/C60 bulk heterojunction photovoltaic devices by doping with stable and highly electrically conductive Au Ag nanoparticles. Doped showed 50–70% efficiency, the nanoparticles exhibiting greatest increase in efficiency. suggest that a dominate mechanism for efficiency enhancement of doped device is electrical conductivity through introduction “dopant” levels within band gap P3OT.