Materials Literature
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Frequency-response analysis (FRA) has been accepted as one of the most sensitive tools to detect mechanical faults of power transformers. Correct interpretation of FRA responses is crucial when assessing the integrity of a transformer. Transformer FRA responses have distinctive frequency regions which are predominated…
Modern excitonic solar cells efficiently harvest photons in the 350-650 nm spectral range; however, device efficiencies are typically limited by poor quantum yields for red and near-infrared photons. Using Forster-type resonance energy transfer from zinc phthalocyanine donor molecules to ruthenium polypyridine complex…
Nitrogen-doped titanium oxide powders were synthesized by the two-microemulsion technique and used as a support for Pt toward photocatalytic hydrogen evolution. Two solutions of microemulsion with same water/oil (w/o) ratio were mixed together to form a slurry of titania precursor, one contains Ti 4+ ions chelated wit…
Large-area noncurling crystallized free-standing TiO 2 nanotube (TNT) arrays have been fabricated by a two-step anodization process. These free-standing crystallized TNT arrays can be easily transferred to fluorine-doped tin oxide glass substrates without any crack. Furthermore, the investigation of these crystallized…
A comprehensive overview to the rapidly emerging field of electron tomography (ET) for the study of heterogeneous catalysts and related nanostructured materials is presented. The study includes a detailed analysis of materials classes of zeolites, ordered mesoporous materials, disordered oxide supported catalysts, car…
A quick and reproducible surface-enhanced Raman scattering (SERS)-based immunoassay technique, using hollow gold nanospheres (HGNs) and magnetic beads, has been developed. Here, HGNs show strong enhancement effects from individual particles because hot spots can be localized on the pinholes in the hollow particle stru…
Muon spin relaxation experiments on the noncentrosymmetric intermetallic superconductor LaNiC2 are reported. We find that the onset of superconductivity coincides with the appearance of spontaneous magnetic fields, implying that in the superconducting state time-reversal symmetry is broken. An analysis of the possible…
The complex structures that allow geckos to repeatably adhere to surfaces consist of multilevel branching fibers with specialized tips. We present a novel technique for fabricating similar multilevel structures from polymer materials and demonstrate the fabrication of arrays of two- and three-level structures, wherein…
In this Letter we present the controlled coupling of a single nitrogen vacancy center to a plasmonic structure. With the help of an atomic force microscope, a single nanodiamond containing a single nitrogen vacancy center and two gold nanospheres are assembled step-by-step. We show that both the excitation rate and th…
We present a simple yet robust method for fabricating angled, hierarchically patterned high-aspect-ratio polymer nanohairs to generate directionally sensitive dry adhesives. The slanted polymeric nanostructures were molded from an etched polySi substrate containing slanted nanoholes. An angled etching technique was de…
Pharmaceutical cocrystals can improve solubility, dissolution, and bioavailability of poorly water soluble drugs. However, true cocrystal solubility is not readily measured for highly soluble cocrystals because they can transform to the most stable drug form in solution. The objectives of this study are to develop a m…
Mg -3 Ni -2 MnO 2 hydrogen storage nanocomposites added with different composition (1%~4%) carbon nanotubes (CNTs) were prepared by mechanical milling under the atmosphere of hydrogen. Different mechanical milling process parameter has been discussed in this paper. Study on hydrogen storage ability of Mg -3 Ni -2 MnO…
A novel push-pull quinoid dye [(4-benzo-1,3-dithiol-2-ylidene)quinocyanocarboxymethylene (BDTQCC)] was synthesized as a photosensitizer for dye sensitized solar cell (DSSC). BDTQCC has a broad absorption band between 450 nm and 700 nm derived from the π-π* transition with a charge transfer character. The DSSC using BD…
In recent years, Nitinol, near-equiatomic nickel-titanium alloys, have found growing applications in medical technology and joining technology, due to their special characteristics such as shape memory, superelasticity and biocompatibility. The production of Nitinol tube cost-effectively remains a technical challenge.…
By applying ab initio molecular dynamics simulation to liquid Cu(6)Sn(5) alloy, the hetero-coordination tendency is discovered by Bathia-Thornton partial correlation functions and a chemical short-range parameter. However the local structural environment of Sn in l-Cu(6)Sn(5) alloy resembles that of liquid Sn by Voron…
Aromatic poly(amide-hydrazide)s contain a higher percentage of polar group in the polymer backbone and represent a technologically important class of high performance material exhibiting high thermal, mechanical and chemical stability. The present investigation deals with the synthesis of various new poly(amide-hydraz…
In this work, a series of ZrO 2 / ZrW 2 O 8 ceramic composites with different amounts of ZrW 2 O 8 were successfully prepared by calcining the precursors synthesized using co-precipitation route at 1150°C for 3 h. The X-ray diffraction (XRD) data confirmed that the composites only consisted of α- ZrW 2 O 8 phase and m…
In this work, two newly synthesized iron phthalocyanines (FePc's), with de-activating substitutents, iron(II) 2,9,16,23-tetra-tert-butyl-phthalocyanine (FePc(tBu)4), and its' naphthalocyanine derivative, iron(II) 2,11,20,29-tetra-tert-butyl-2,3-naphthalocyanine (FeNpPc(tBu)4), were evaluated as both oxygen (O2) reduct…
In our research, boron was added into the Nb -added high strength low alloy (HSLA) H -section steels. The contents of boron added were 4ppm, 8ppm and 11ppm, respectively. The mechanical properties of H -section steels with/without boron were examined by using uniaxial tensile test and Charpy impact test ( V -notch). T…
Ruthenium oxide cathodes with low hydrogen overvoltage were manufactured by thermal decomposition method. Catalytic coating was comprised of ruthenium oxide and cerium oxide. Changes of crystalline structure and morphology of catalytic coating by electrolysis were observed. Mechanism of activation and stabilization of…