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Articles 31 - 36 of 36
Full-Text Articles in Engineering
Engineering Gold Nanoparticles And Their Use To Control Nucleation, Pedram Jahanian
Engineering Gold Nanoparticles And Their Use To Control Nucleation, Pedram Jahanian
Wayne State University Dissertations
This study focuses on fabrication of hybrid nanostructures using gold nanoparticles (AuNP) as seeds and partially oxidized potassium tetracyanoplatinate, known as Krogmann’s salt (KCP), and later this method will be employed to manufacture a prototype sensor for detecting different vapors. Nanocrystals are synthesized using electrochemical method with the aim to have more control over the size and shape of the charge transfer salt based on the seed mediated nucleation method. AuNP seeds are prepared on highly ordered pyrolytic graphite (HOPG) substrate by the electrocrystallization method. An aqueous solution of 0.05 to 1 mM Hydrogen tetrachloroaurate (HAuCl4) with 0.1 mM (Potassium …
Investigating The Size Dependent Material Properties Of Nanoceria, Bushra B. Alam
Investigating The Size Dependent Material Properties Of Nanoceria, Bushra B. Alam
Legacy Theses & Dissertations (2009 - 2024)
Nanoceria is widely being investigated for applications as support materials for fuel cell catalysts, free radical scavengers, and as chemical and mechanical abrasives due to its high antioxidant capacity and its oxygen buffering capacity. This antioxidant or oxygen buffering capacity has been reported to be highly size dependent and related to its redox properties. However, the quantification of this antioxidant capacity has not been well defined or understood and has been often been carried out using colorimetric assays which do not directly correlate to ceria nanoparticle properties. Fabrication rules for developing materials with optimal antioxidant/oxygen buffering capacities are not yet …
Investigation Of The Optical And Sensing Characteristics Of Nanoparticle Arrays For High Temperature Applications, Gnanaprakash Dharmalingam
Investigation Of The Optical And Sensing Characteristics Of Nanoparticle Arrays For High Temperature Applications, Gnanaprakash Dharmalingam
Legacy Theses & Dissertations (2009 - 2024)
The monitoring of polluting gases such as CO and NOx emitted from gas turbines in power plants and aircraft is important in order to both reduce the effects of such gases on the environment as well as to optimize the performance of the respective power system. The need for emissions monitoring systems is further realized from increased regulatory requirements that are being instituted as a result of the environmental impact from increased air travel. Specifically, it is estimated that the contributions from aircraft emissions to total NOx emissions will increase from 4% to 17% between 2008 and 2020. Extensive fuel …
Tracking Silver, Gold, And Titanium Dioxide Nanoparticles Through Drinking Water Systems By Single Particle - Inductively Coupled Plasma - Mass Spectrometry, Ariel Renee Donovan
Tracking Silver, Gold, And Titanium Dioxide Nanoparticles Through Drinking Water Systems By Single Particle - Inductively Coupled Plasma - Mass Spectrometry, Ariel Renee Donovan
Masters Theses
"Single particle (SP)-ICP-MS methods were developed to characterize and quantify Ti-containing, titanium dioxide, silver, and gold NP concentration, size, size distribution and dissolved metal element concentration in surface water and treated drinking water. The effectiveness of conventional drinking water treatments (including lime softening, alum coagulation, filtration, and disinfection) to remove NPs from surface water was evaluated using six-gang stirrer jar test simulations. Six-gang stirrers were used to simulate drinking water treatments including lime softening, alum coagulation, powdered activated carbon sorption, filtration, and disinfection by free chlorine. Lime softening effectively removed most nanoparticles added. Source and drinking waters from three large …
Synchrotron Activation Radiotherapy: Effects Of Dose-Rate And Energy Spectra To Tantalum Oxide Nanoparticles Selective Tumour Cell Radiosensitization Enhancement, Elette Engels, Michael L. F Lerch, Moeava Tehei, Konstantin K. Konstantinov, Susanna Guatelli, Anatoly B. Rosenfeld, Stephanie Corde
Synchrotron Activation Radiotherapy: Effects Of Dose-Rate And Energy Spectra To Tantalum Oxide Nanoparticles Selective Tumour Cell Radiosensitization Enhancement, Elette Engels, Michael L. F Lerch, Moeava Tehei, Konstantin K. Konstantinov, Susanna Guatelli, Anatoly B. Rosenfeld, Stephanie Corde
Faculty of Engineering and Information Sciences - Papers: Part A
Synchrotron radiation is unique in its ability to deliver dose at high dose rates using kiloelectronvolt photons. We are investigating the use of Tantalum pentoxide (Ta2O5) nano-structured particles (NSPs) that are to date unexplored in synchrotron radiation fields as they have high atomic number (Z=73) are biocompatible and are therefore potential radio sensitizers. We exposed cell culture flasks containing 9L gliosarcoma tumour cells or Madin-Darby Canine Kidney (MDCK) non-tumour cells to the NSPs and treated the cells using a broad synchrotron beam (140 keV median energy; average dose rate of 50 Gy/s) at the Australian Synchrotron. We compare the results …
Slip-Jump Model For Carbon Combustion Synthesis Of Complex Oxide Nanoparticles, A. A. Markov, Mkhitar A. Hobosyan, Karen S. Martirosyan
Slip-Jump Model For Carbon Combustion Synthesis Of Complex Oxide Nanoparticles, A. A. Markov, Mkhitar A. Hobosyan, Karen S. Martirosyan
Physics and Astronomy Faculty Publications and Presentations
Carbon Combustion Synthesis of Oxides (CCSO) is a promising method to produce submicron- and nano- sized complex oxides. The CCSO was successfully utilized for producing several complex oxides, a complete theoretical model including the sample porosity, fl ow parameters and reaction energetics is needed to predict the combustion parameters for CCSO. In this work, we studied the ignition temperature and combustion wave axial temperature distribution, activation energy, combustion heat and thermal losses for a typical CCSO synthesis for cylindrical samples of Ni-Zn ferrites with high (>85%) porosity. We developed a two level combustion model of chemically active nano-dispersed mixture, …