The majority of carboxylic acid groups formed after treatment a single-walled carbon nanotube (SWCNT) material with nitric are present on carboxylated carbonaceous fragments (CCFs) (see figure). These CCFs removed from the SWCNTs by NaOH solution and identified as carriers COOH functionality, implying that previous reports claiming side-wall functionalization should be reconsidered.

A phosphor was synthesized using a decomposition method without the use of toxic gas. and ZnCdS:Ag,Cl phosphors were chosen to produce green red emissions, respectively, under excitation from blue light emitting diode (LED). three band white LED obtained through combination nonabsorbed emission emissions phosphors. The optical properties are also discussed. © 2003 Electrochemical Society. All rights reserved.

In this review, we summarize the recent findings on novel narrow-band red phosphors, improved color and visual energy properties of these their ability to improve optical corresponding warm white pc-WLED lightings.

This work presents the synthesis, structure determination and magnetic properties of a new complex, phenethylammonium tetrachloromanganate(II), (C(6)H(5)CH(2)CH(2)NH(3))(2)MnCl(4) (Mn-PEA). Single crystals Mn-PEA were obtained from methanol solution using solvent-evaporation method at room temperature. The crystal was determined by single-crystal X-ray diffraction (orthorhombic, space group Pbca, = 7.2075(9), b 7.3012(14), c 39.413(6) Å Z 4). consisted an extended [MnCl(4)](2-) network two...

The authors studied the Li concentration dependence of internal efficiency and extraction contributions to enhanced photoluminescence (PL) brightness Li-doped Y2O3:Eu thin films. Experiments conducted with excitation at a wavelength 254nm showed that adding 20mol% Li2CO3 conventional films improved their PL by factor over 7.0. This improvement is attributed factors (crystallinity, grains, substitution interstitial oxygen) increased optical volume (thickness), as well reduction photon...

The morphological evolution of the Ag2O cubic crystal system was examined with goal controlling and fine-tuning morphologies microcrystalline products. A variety shapes could be prepared through reduction a silver-pyridine complex in solution at room temperature. concentrations NaOH AgNO3 significantly affected morphology final product. evolved from simple truncated cube to an 8-pod three arms along ⟨111⟩ directions as concentration increased. edge-truncated rhombic dodecahedron total...

We present a simple morphology-controlled method for the synthesis of Cu2O microcrystals. The microcrystals are prepared via reduction copper with glucose in an alkaline aqueous solution. concentration NaOH plays important role morphology evolution resulting observed microcrystals, which changes from cube to beveled and then rhombicuboctahedron 50-facet polyhedron upon increase concentration. A mechanism is proposed explain Cu2O.

We report the optical properties and morphological structure of potential green phosphors (, ) for application in phosphor-converted three-band white light emitting diodes (LEDs). A series was synthesized using NaBr-aided solid-state reactions a flowing stream. They all crystallized with orthorhombic phase, their emissions were efficiently excited up to . The suitability is discussed terms as coatings altering color blue LEDs.

Thin homogeneous films of the Prussian blue analogues with idealized formulas KFeIII[FeII(CN)6], KNiII[FeIII(CN)6], CsNiII[CrIII(CN)6], and KCrII[CrIII(CN)6] have been prepared through sequential adsorption appropriate metal ions hexacyanometalate complexes onto hydrophobic surfaces that were first templated an Fe−CN−Ni two-dimensional grid network deposited as a Langmuir−Blodgett monolayer. The template is essentially one layer cubic structure provides well-matched surface for deposition...

We report measurement of the HD product quantum state distributions and absolute cross section for H+CD4→HD(v′,J′)+CD3 reaction at a collision energy 1.5 eV. The total is small, 0.14±0.03 Å2, making experimental measurements difficult. distribution peaks low J′ in both v′=0 v′=1, only vibrational states which observed. Very little eV available appears as internal excitation molecule, 7% vibration 9% rotation. However, linear surprisal analysis shows that this limited disposal some ways...

The development of wide band gap III-V nitride compound semiconductors has led to the commercial production high-efficiency LEDs. recent advent blue InGaN technology made it possible produce a conventional white LED in which light is obtained by coating Y3Al5O12:Ce (or Sr3SiO5:Eu) phosphor onto chip. In this device, known as two-band LED, generated additive color mixing emitted and yellow phosphor. important because opens way for applications such bulbs fluorescent lamps with high durability...

Copper is an essential element required for a variety of functions exerted by cuproproteins. An alteration the copper level associated with multiple pathological conditions including chronic ischemia, atherosclerosis and cancers. Therefore, homeostasis, maintained combination two ions (Cu(+) Cu(2+)), critical health. However, less known about which more toxic or functional in endothelial cells. Cubic-shaped Cu2O CuO crystals were prepared to test role different ions, Cu(+) Cu(2+),...

Bright yellow <TEX>${(Y_{1-x}Gd_x)}_{3-z}{(Al_{1-y}Ga_y)}_5O_{12}:Ce_z$</TEX> phosphors were synthesized. White LED was obtained by the combination of non-absorbed blue emission from a L ED itself and phosphors. The crystal structures optical properties investigated.

Figure 1. XRD pattern of snowflake-like α-Fe2O3 synthesized at [FeCl3] = 0.05 M and [KCN] 2.00 under hydrothermal conditions for 16 h 140 C. Hierarchical structures metal oxides comprised nanoparticles, nanorods, nanobelts as building blocks have attracted great interest due to their novel structures, properties, applications. However, the preparation high-quality crystals with hyperbranched is a challenging issue. The majority these are formed by hierarchical self-assembly mechanisms,...

Intercalation compounds of anthraquinone sulfonate ions into layered double hydroxides (LDHs) have been directly synthesized. From the X-ray diffraction data and guest size, orientation intercalated was determined. The anthraquinone-1,5-disulfonate (AQ15) anthraquinone-2,6-disulfonate (AQ26) are arranged with their molecular planes group axes tilted to perpendicular hydroxide layer. Intercalated anthraquinone-2-sulfonate (AQ2) is plane its axis also layer an antiparallel pattern. product...