1. Center for Bioelectronics; Biosensors and Biochips (C3B); Department of Biomedical Engineering; Texas A&M University; College Station TX 77843 USA
2. Department of Biomedical Engineering; Texas A&M University; College Station TX 77843 USA
3. Artie McFerrin Department of Chemical Engineering; Texas A&M University; College Station TX 77843 USA
4. ABTECH Scientific, Inc.; Biotechnology Research Park; 800 East Leigh Street Richmond VA 23219 USA