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Full-Text Articles in Engineering
Enhanced Dna Sensing Via Catalytic Aggregation Of Gold Nanoparticles, Herbert M. Huttanus, Elton Graugnard, Bernard Yurke, William B. Knowlton, Wan Kuang, William L. Hughes, Jeunghoon Lee
Enhanced Dna Sensing Via Catalytic Aggregation Of Gold Nanoparticles, Herbert M. Huttanus, Elton Graugnard, Bernard Yurke, William B. Knowlton, Wan Kuang, William L. Hughes, Jeunghoon Lee
Materials Science and Engineering Faculty Publications and Presentations
A catalytic colorimetric detection scheme that incorporates a DNA-based hybridization chain reaction into gold nanoparticles was designed and tested. While direct aggregation forms an inter-particle linkagefrom only one target DNA strand, catalytic aggregation forms multiple linkages from a single target DNA strand. Gold nanoparticles were functionalized with thiol-modified DNA strands capable of undergoing hybridization chain reactions. The changes in their absorption spectra were measured at different times and target concentrations and compared against direct aggregation. Catalytic aggregation showed a multifold increase in sensitivity at low target concentrations when compared to direct aggregation. Gelelectrophoresis was performed to compare DNA hybridization reactions …
Characterization Of The 5 Ghz Elevator Shaft Channel, Ruoyu Sun, David W. Matolak
Characterization Of The 5 Ghz Elevator Shaft Channel, Ruoyu Sun, David W. Matolak
Faculty Publications
In this paper we provide channel characterization results for the elevator shaft channel in the 5-GHz band, based upon measurements conducted in four buildings. This channel is of interest for several applications, including WiFi and public safety. Although several authors have provided elevator shaft channel characteristics for lower-frequency bands (255-MHz, 900-MHz, 1.9-GHz), to our knowledge this is the first work that addresses the 5-GHz band. Moreover, prior work has not thoroughly addressed channel characteristics when the elevator car is in motion, whereas here we provide measurement and modeling results for this dynamic condition. Our measurements were of power delay profiles, …
Electromagnetic Stimulation Of Transport In Water For Geoenvironmental Applications, A. Farid, M. Azad, J. Browning, Elisa H. Barney Smith
Electromagnetic Stimulation Of Transport In Water For Geoenvironmental Applications, A. Farid, M. Azad, J. Browning, Elisa H. Barney Smith
Civil Engineering Faculty Publications and Presentations
Air sparging is a popular soil remediation technique that enables the removal of contaminants by diffusing air into saturated zones of soil. The removal process is, however, slow. The goal of this work is to study the effect of electromagnetic (EM) waves - with minimal heat generation - on transport mechanisms such as diffusion, in order to improve airflow or contaminant transport and expedite the cleanup process using air sparging or similar technologies. This effect is studied through an experimental setup that examines the diffusion of a nonreactive dye in water under EM waves at a range of frequencies between …