3,001 research outputs found
Transformation of Pb-chalcogenide quantum dots in the DMSO solvent under acidic condition
No full textWe demontrate the transformation of PbE (E= S or Se) quantum dots (QDs) in the dimetylsulfoxide (DMSO) under acidic environments at room temperature. In this study, we blended the PbE quantum dots in the DMSO with nitric acid, which was used to adjust pH of solution. Upon mixng, PbSe QDs readily transformed into trigonal-Se nanowires (NWs) at pH 6. We speculate that the transformation is induced by DMSO, which plays a key role such as dispersion solvent, reducing agent of SeO2 and Pb complexing agent while the acidity promotes the cleavage of Pb-Se bond. In the case of PbS QDs, the crystallinity of the QDs remained relatively intact after DMSO mixing, while aggregated into a porous cluster. The QDs strength of Pb-S (342 kJ/mol) bonding compared to that of Pb-Se (231 kJ/mol) is responsible for the difference in transformation behaviors. The finding from this study provides not only the fundamental understanding of transformation of Pb chalcogenide QDs but also a new synthetic method of Se or Te NWs
Report of change of status and address, W.D., A.G.O. form no. 641, Minoru Frank Saito
No full textA copy of a "report of change of status and address, W.D., A.G.O. form" submitted to War Department by Minoru Frank Saito. He added his sister Joyce Teruko Saito as his dependent. Due to lack of her birth certificate, he was not able to include her as his dependent when he applied for it
Application for dependency benefits (servicemen's dependents allowance act of 1942), W.D., A.G.O. Form no. 625., Minoru Frank Saito
No full textAn applicant's copy of an "application for dependency benefits (servicemen's dependents allowance act of 1942), W.D., A.G.O. Form no. 625" form submitted to War Department by Minoru Frank Saito. His mother, Kiku Saito, who has been incarcerated in the Granada camp, is listed as his dependent
America's other Muslims: Imam W.D. Mohammed, Islamic reform, and the making of American Islam Black diasporic worlds./ Muhammad Fraser-Rahim.
No full textIncludes bibliographical references (pages 111-125) and index.Fraser-Rahim spotlights the emergence of an American school of Islamic thought, which was created and established by the son of the former Nation of Islam leader. W.D. Mohammed rejected his father's teachings and embraced normative Islam on his own terms while balancing classical Islam and his lived experience of Islam in the diaspora.Intro -- Contents -- Acknowledgments -- Preface -- Introduction -- 1. African American Islam in context -- 2. Taffakur ("to think, ponder, reflect"): Islam in West Africa and Islamic revivalism -- 3. Africanizing Dixie: the enslaved African Muslim experience and the Black American Islamic continuum -- 4. Imam W.D. Mohammed, the patron saint of American Islam: personality, intellectual teachings, and reformation -- 5. Walking with Brother Imam: the community of W.D. Mohammed as a counterweight to extremism -- Conclusion -- Glossary of terms -- Bibliography -- Index -- About the author.1 online resource (148 pages
Photocatalytic Reduction of Methylene Blue using Infrared-Active Heterosturucture Nanocrystals
No full textColloidal semiconductor nanocrystal quantum dots exhibit size-tunable energy gap, potentially useful for a wide variety of applications such as photocatalysis, photovoltaics and light emittind divices. Core/shell heterostructure also enables the control of exciton dynamics: through a relatively simple experimental tweaks, one can tune the morphology and dimension of core and shell. We synthesized PbSe/CdSe/CdS core/shell/shell nanocrystals with type II band offset and varying morphologies ranging from sphere to pyramid and tetrapod structures. In addition, we obtained metal-semiconductor nanohybrid by growing gold nanoparticles at the corners of the semiconductor nanocrystal surface to promote photocatalytic performance for reduction of methylene blue. It turned out that the morphological change leads to significant difference in photocatalytic efficiency. Tetrapods show the highest photocatalytic performance over that of pyramids and sphere. The Au-tipped PbSe/CdSe/CdS nanocrystals exhibited exceptional photocatalytic activity in the visible and near infrared region out to 785 nm. (e.g., tetrapod heteronanocrystals under 785 nm light with 70% methylene blue reduction in 4 h)
Reynolds number dependence of the dimensionless dissipation rate in stationary magnetohydrodynamic turbulence
No full textResults on the Reynolds number dependence of the dimensionless total dissipation rate C_ε are presented, obtained from medium to high resolution direct numerical simulations (DNSs) of mechanically forced stationary homogeneous magnetohydrodynamic (MHD) turbulence in the absence of a mean magnetic field, showing that C_ε -> const with increasing Reynolds number. Furthermore, a model equation for the Reynolds number dependence of the dimensionless dissipation rate is derived from the real-space energy balance equation by asymptotic expansion in terms of Reynolds number of the second- and third-order correlation functions of the Elsässer fields z± = u ± b. At large Reynolds numbers we find that a model of the form C_ε = C_ε,∞ + C/R describes the data well, while at lower Reynolds numbers the model needs to be extended to second order in 1/R in order to obtain a good fit to the data, where R is a generalised Reynolds number with respect to the Elsässer field z-
A review of morphological studies and models relevant for the Wadden Sea
No full textThis review presents brief summaries of a number of reports and mathematical models known to the author which may be relevant for short-term and long-term morphological developments of the Wadden Sea. It certainly is not a complete list of literature on this subject but it may guide other investigators working on this subject.Hydraulic EngineeringCivil Engineering and Geoscience
FOURIER TRANSFORM MICROWAVE SPECTROSCOPY OF ARGON CHLOROCYCLOBUTANE
No full text H. Kim and W.D. Gwinn J. Chem. Phys. 44, 865, (1966)Author Institution: Department of Chemistry, Wesleyan UniversityThe microwave spectrum of chlorocyclobutane was reported in . We have measured the microwave spectrum of argon chlorocyclobutane as part of our on-going research on bonding and dynamics of four-membered ring containing van der Waals complexes. Preliminary results show that the four-membered ring remains puckered in the complex. An analysis based partially on the nuclear quadrupole coupling projections of the nucleus will be presented
Reliability of Organic Compounds in Microelectronics and Optoelectronics: From Physics-of-Failure to Physics-of-Degradation
No full textThis book aims to provide a comprehensive reference into the critical subject of failure and degradation in organic materials, used in optoelectronics and microelectronics systems and devices. Readers in different industrial sectors, including microelectronics, automotive, lighting, oil/gas, and petrochemical will benefit from this book. Several case studies and examples are discussed, which readers will find useful to assess and mitigate similar failure cases. More importantly, this book presents methodologies and useful approaches in analyzing a failure and in relating a failure to the reliability of materials and systems.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic Components, Technology and Material
How Mexico's Dairy Industry Has Evolved Under the NAFTA - Implications for U.S. Dairy Exporters and U.S. Investors in Mexico's Dairy-Food Businesses
No full textThis Discussion Paper shows that the demand for imported dairy products will continue to be strong in Mexico, especially after the 2001-2002 recession ends. However, Mexico's dairy markets have matured under the NAFTA. As part of the maturity, a larger number of strong domestic firms have emerged and powerful European multi-nationals have increased dairy product sales in Mexico. In addition, the expansion of U.S. exports of fluid milk, yogurt, dried whey, and lactose to Mexico will be slow in near future because U.S. market shares of imports of these products are already large. Thus, Mexico's dairy markets no longer represent "low hanging fruit" (if they ever did) for U.S. dairy exporters and direct investorsNAFTA, Maturing Mexican Dairy Markets, U.S. Dairy Exports to Mexico, Demand and Price Analysis, Food Consumption/Nutrition/Food Safety, International Development, International Relations/Trade,
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