Publications

With the rising demands for small, lightweight, and long-lasting portable electronics, the need for energy storage devices with both large power and large eneergy densities become vitally important. From their usage in hybrid electric vehicles to wearable electronics, supercapacitors, and rechargeable batteries have been the focus of many previous works. Electrode materials with large specific surface areas can enhance the charning speed and total amount of stored energy. To this end, vertically self-aligned conductivities as well as high mechanical stregth and large specific surface areas...

The global population faces significant challenges in not only improving health care, but even just in maintaining it. Environmental and economic disparities are increasingly creating a massive population that lacks adequate medical attention. Traditional tools employed to detect, monitor, and treat sickness are woefully inadequate in the face of this grand challenge in medicine. However, a new generation of technologies is under development that promises to increase both the access and the quality of care available on a global scale. These tools provide simple but powerful means for...

Ideal point-of-care medical diagnostic devices are low cost assays capable of performing quantitative on-site rapid testing with high sensitivity and minimal manual steps.

Current mainstream assays have several key limitations. Take, for instance, the common lateral flow assay—e.g. the pregnancy dipstick test. Such assays produce rapid results at low cost; however, they are mostly qualitative tests yielding only positive/negative results rather than quantitative figures. Other standard immunosorbant assays such as ELISA yield quantitative results but require...

The size and performance of integrated circuits have been following Moore’s law to continuously shrink and progress over the past decades while on-chip inductors have seen little advancements. This work proposes several unique approaches in the integrated magnetic cores for high frequency micro inductor developments, including: (1) spherical-shape, anti-oxidizing magnetic nanoparticle composites; (2) sputtered magnetic thin films with magnetization-induced anisotropy; and (3) rectangular-shape magnetic particles with geometry-induced anisotropy. Theoretical and simulation studies...