Materials Literature
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The photophysical properties of 4-naphthalen-1-yl-benzoic acid ligands and their Eu(III)-cored complexes were systematically investigated to elucidate the effective energy-transfer pathway in luminescent lanthanide complexes. A series of 4-naphthalen-1-yl-benzoic acid ligands, such as 4-naphthalen-1-yl-benzoic acid (N…
Electrochemical characteristics for the carbide-derived nanoporous carbon (prepared from TiC, , , , and ) in 1 M various tetraalkyl ammonium tetrafluoroborate in acetonitrile, γ-butyrolactone, and propylene carbonate electrolyte solutions has been studied using cyclic voltammetry and electrochemical impedance spectros…
We have illustrated that the dense helical arrays of CdS nanoparticles, which are aligned one-by-one and side-by-side, form on the self-assembled nanotube template from the binary components, glycolipid, N -(11- cis -octadecenoyl)-β- d -glucopyranosylamine ( 1 ) and aminophenyl-β- d -glucopyranoside ( 2 ) as an additi…
We have investigated the spectroscopic and electrochemical behavior of symmetric and unsymmetric first-, second-, and third-generation dendrimers comprising an electron-acceptor 4,4'-bipyridinium core (viologen type) and electron-donor 1,3-dimethyleneoxybenzene (Fréchet-type) dendrons. The quite strong fluorescence of…
Dispersible single-walled carbon nanotubes grafted with poly(4-vinylpyridine), SWNT-PVP, were tested in coordination assays with zinc tetraphenylporphyrin (ZnP). Kinetic and spectroscopic evidence corroborates the successful formation of a SWNT-PVPZnP nanohybrid. Within this SWNT-PVPZnP nanohybrid, static electron-tra…
Stain etching of silicon provides a spontaneous, self-limiting chemical method to produce nanocrystalline silicon films (porous Si). Whereas the existence of etchants capable of producing porous Si has been known for some time, little has been known concerning how solution composition influences the efficacy of porous…
Organic porous chiral thin films of tris(8-hydroxyquinoline) aluminum have been made (see Figure) using glancing-angle deposition (GLAD). The films emit circularly polarized light under photoexcitation and consist of highly uniform, self-organized arrays of submicrometer helices. These films combine the molecular dive…
Polymer therapeutics has emerged as a new clinical option for the treatment of human diseases. However, little is known about pharmacogenetic responses to drugs formulated with polymers. In this study, we demonstrate that a formulation containing the block copolymer Pluronic P85 and antineoplastic drug doxorubicin (Do…
A novel seed-assisted chemical reaction at 95 degrees C has been employed to synthesize uniform, straight, thin, and single-crystalline ZnO nanorods on a hectogram scale. The molar ratio of ZnO seed and zinc source plays a critical role in the preparation of thin ZnO nanorods. At a low molar ratio of ZnO seed and zinc…
Electron field emission measurements have been made on multiwall arc discharge carbon nanotubes embedded in a conjugated polymer host. Electron emission at low nanotube content is observed and attributed to an enhancement of the applied electric field at the polymer/nanotube/vacuum interface where the electron supply…
Novel polymer nanotube composites were fabricated by intercalating poly(vinylpyrrolidone) into Buckypaper from solution. This was carried out for both low $(10k\phantom{\rule{0.3em}{0ex}}\mathrm{g}∕\mathrm{mol})$ and very high $(1.3M\phantom{\rule{0.3em}{0ex}}\mathrm{g}∕\mathrm{mol})$ molecular weight polymers. Measur…
ReO 3 nanoparticles in the diameter range of 8.5−32.5 nm have been prepared by decomposition of the Re 2 O 7 −dioxane complex under solvothermal conditions and characterized by X-ray diffraction, electron microscopy, optical spectroscopy, and scanning probe microscopy. The nanoparticles have the cubic ( Pm 3̄ m {221}…
Manganese oxide was deposited spontaneously on acetylene black by the simple immersion of the acetylene black into a K Mn O 4 aqueous solution via a one-step chemical process for application in electrochemical capacitors. Acetylene black was found to act as the reducing agent and substrate for the heterogeneous nuclea…
Abstract Intense electron-phonon scattering near the peak electric field in a semiconductor device results in nanometer-scale phonon hotspots. Past studies have argued that ballistic phonon transport near such hotspots serves to restrict heat conduction. We reexamine this assertion by developing a new phonon transport…
The electrochemical and structural aspects of lithium insertion into vanadium oxide nanotubes have been studied. Structural changes, induced as lithium was inserted between the vanadium oxide layers, were followed by in situ synchrotron X-ray diffraction recorded during potential steps. Two separate processes were ide…
We show that the local temperature dependence of thermalized electron and phonon populations along metallic carbon nanotubes is the main reason behind the nonlinear transport characteristics in the high bias regime. Our model is based on the solution of the Boltzmann transport equation considering both optical and zon…
The scanning vibrating electrode technique (SVET) and pH microscopy were used to study the effect of electrolyte composition and steel thickness on the precipitation of zinc-based corrosion products on the cut edge of galvanized steel. Current distributions were measured with the SVET, and the distribution of pH was m…
Single crystalline tellurium (Te) nanotubes with triangular cross sections were successfully synthesized for the first time by a simple approach of vaporizing tellurium metal and condensing the vapor in an inert atmosphere onto a suitable substrate. Tellurium gas was evaporated by heating at 350 degrees C and was cond…
Tin(IV) oxide nanoparticles were synthesized via the reaction of carbon dioxide with stannate ions immobilized by dendritic polymers. For PAMAM and PPI dendrimer hosts, resultant nanoparticle diameters were 2.5-3 nm; 3-3.5 nm nanoparticles resulted from use of a poly(ethyleneimine) hyperbranched polymer. Our condition…
Ferroelectric nanodots and infinite wires of $\mathit{Pb}({\mathit{Zr}}_{0.4}{\mathit{Ti}}_{0.6}){\mathit{O}}_{3}$ alloy under different boundary conditions are investigated via Monte Carlo simulations using an atomistic first-principles-based effective Hamiltonian. These nanosystems all exhibit a spontaneous polariza…