By a News Reporter-Staff News Editor at Journal of Engineering -- From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Atashbar, Massood Zandi (Kalamazoo, MI); Bejcek, Bruce Evan (Portage, MI), filed on October 23, 2006, was published online on August 13, 2013.
The patent's assignee for patent number 8510056 is Western Michigan University Research Foundation (Kalamazoo, MI).
News editors obtained the following quote from the background information supplied by the inventors: "Single Wall Carbon nanotubes (SWNTs) can be realized as graphite sheets that have been rolled into seamless cylinders. Ever since Carbon nanotubes (CNTs) discovery by Iijima in 1991, they have been treated as the most promising nanostructured materials. S. Iijima, 'Helical microtubules of graphitic carbon', Nature, vol. 354, pp. 56-58, November 1991. Carbon nanotubes exhibit both semiconducting and metallic behavior depending on their chirality. J. W. G. Wildoer, L. C. Venema, A. G. Rinzler, R. E. Smalley, and C. Dekker, 'Electronically structure of atomically resolved carbon nanotubes', Nature, vol. 391, pp. 59-61, January 1998. This special property of nanotubes makes them the ideal choice for interconnects and also as active devices of nanoelectronics. CNTs have been used as chemical sensors for the detection of hazardous gasses such as NH.sub.3 and NO.sub.2. J. Kong, N. R. Franklin, C. Zhou, M. G. Chapline, S. Peng, K. Cho, and H. Dai, 'Nanotube molecular wires as chemical sensors', Science, vol. 287, pp. 622-625, January 2000. The application of these quantum wires as biological sensors is a new facet which might find significant applications in the life sciences field and it has been recently demonstrated that individual semiconducting single wall carbon nanotubes can be used for the detection of glucose oxidase. R. J. Chen, H. C. Choi, S. Bangsaruntip, E. Yenilmez, X. Tang, Q. Wang, Y. Chang, and H. Dai, 'An investigation of the mechanisms of electronic sensing of protein adsorption on carbon nanotube devices', Journal of American Chemical Society, vol. 126, pp. 1563-1568, January 2004. K. Besteman, J. Lee, F. G. M. Wiertz, H. A. Heering, and C. Dekker, 'Enzyme-coated carbon nanotubes as single-molecule biosensors' Nanoletters, vol. 3, pp. 727-730, April 2003.
"Recently acoustic wave sensors have been used for many applications in detecting chemical components in liquid media. By using the so-called chemical interfaces, they can be implemented for determining the concentration of a highly specific target compound in a liquid environment. The chemical interface selectively adsorbs materials in the solvent to the surface of the sensing area. Due to the change in the mass, the perturbation in the physical and chemical properties of the surface changes the phase and amplitude of the acoustic and electromagnetic fields on the surface. These changes can be monitored as the related change of mass.