Optical properties of multilayer InAs quantum dot waveguides, grown by molecular beam epitaxy, have been studied under applied electric field. Fabry-Perot measurements at 1515 nm on InAs/GaAs quantum dot structures yield a significantly enhanced linear electro-optic efficiency compared to bulk GaAs. Electro-absorption measurements at 1300 nm showed increased absorption with applied field accomp...

<p>In this research the arsenic contaminations issues are exposed and suitable measures recommended through electrokinetic remediation. The expulsion was assessed using electro kinetic remediation from two different soil tests; alluvial clay red taken Tamilnadu zone. Three distinct cathodic electrolytes—deionized water (DIW), potassium phosphate (KH2PO4), sodium hydroxide—were used to tes...

In this study, adsorption of a non-steroidal anti-inflammatory drug such as Diclofenac (DCF) on commercial carbonaceous aerogel honeycomb monolith (NANOLIT®-NQ40) was ascertained. Based on, the overall design an treatment should include feasible regeneration process for spent adsorbent. work, adsorption/desorption ameliorated by coupling electrochemical technology (anodic/cathodic polarisation)...

Piezoelectricity in ferroelectrics arises from electrostriction biased by their spontaneous polarisation, which can be enhanced through a bias-induced polarisation. Doing so, the piezoelectric response tuned and significantly enhanced. In this study, ferroelectric polymer P(VDF-TrFE) was used to electro-mechanically excite silicon microcantilever. Using device, we demonstrate that polarisation ...

Reducing agents-Enhanced electrokinetic Soil Remediation (EKSR) was performed for the removal of chromium (Cr), cobalt (Co) and nickel (Ni) from contaminated soil. The reducing agents oxalic acid and ascorbic acid were investigated under constant voltage gradient (2.0 V/cm), current changes, pH, redox potential, concentration changes and removal performance of Heavy Metals (HMs). The result...

Electrokinetic soil remediation by electroosmosis and ionic migration is restricted to soluble substances. At a higher pH, the soil particles sorb more heavy metals than at a lower pH and the precipitation reactions of heavy metals are promoted. Both mechanisms make heavy metals immobile, rendering cleanup more difficult and electrokinetic extraction inefficient. In this study, the effectivenes...

We have been studying an MTBE plume at Vandenberg Air Force Base, CA. Microcosm studies with site sediments, conducted at the University of California at Davis and the University of Waterloo, suggest that native aerobic MTBE-degrading bacteria are present in the site sediments and can be stimulated to degrade MTBE solely by adding oxygen. In two separate field tests, dissolved oxygen has been r...

Hydrolysis is a water substitution reaction that aids in the breakdown of many organic molecules. While it has been long studied and used by chemists, hydrolysis has been underutilized by the environmental remediation community. Hydrolysis has been overlooked because its reaction rates, at ambient conditions, are in most cases too slow for efficient degradation of harmful organic compounds. In ...