NEWS
Research Presented at the Annual NSE Grantee's Conference
At the 2004 NSF Nanoscale Science and Engineering (NSE) Grantees Conference in Arlington, Virginia (December 13-14, 2004). Professor Tsu-Wei Chou, P.S. du Pont Chair of Engineering gave a presentation that highlighted recent research accomplishments of the NIRT Research Team.
Click here to download a copy of our NIRT program overview published in the NSE conference proceedings.
NIRT Research: Nanotube Arrays as Light Antennas
In a nanotube array, each nanotube is like a tiny metallic rod 50 nm in diameter and 200-1000 nm long. For antennas, the highest efficiency occurs at antenna lengths that are similar in length to the incoming radiation. A unique consequence of their small size is that nanotubes can interact with wavelengths in the spectrum of visible light, and therefore it is possible to send and receive light waves just like a radio. We have demonstrated for the first time the antenna effect for light
This type of device may have wide-ranging applications in high-efficiency solar energy conversion and optical computing.
Y. Wang, K. Kempa, B. Kimball, J. B. Carlson, G. Benham, W. Z. Li, T. Kempa, J. Rybczynski, A. Herczynski, and Z. F. Ren, “Receiving and Transmitting Light-like Radio Waves: Antenna Effect in Arrays of Aligned Carbon Nanotubes,” Applied Physics Letters, 85, 2607-2609 (2004).
Click here to read a NSF Nano Highlight about this topic.
NIRT Research: Microarray Devices as Nanoscale Resonators
Nanomechanical resonators made from carbon nanotubes may result in a new generation of sensors can be expected to meet the high-performance requirements of many sensing applications, including chemical reaction monitors, biomedical sensors, mass detectors, pressure sensors, temperature sensors and nano-accelerometers.
Computational results show that the fundamental frequencies of cantilevered or bridged single-walled carbon nanotubes could reach the level of 10 GHz – 1.5 THz, depending on the nanotube diameter and length. This frequency is much higher than the highest attainable frequencies for existing nanomechanical resonators.
Chunyu Li and Tsu-Wei Chou, “Vibrational behaviors of multiwalled carbon nanotube-based nanomechanical resonators”, Applied Physics Letters, 84, 121-123 (2004).
Click here to read a NSF Nano Highlight about this topic.
NIRT Research Highlighted at the Annual NSE Grantee's Conference
At the annual NSF Nanoscale Science and Engineering (NSE) Grantees Conference in Arlington, Virginia (December 16-18, 2003). Professor Tsu-Wei Chou, P.S. du Pont Chair of Engineering presented a poster highlighting recent research results of the NIRT Research Team.
Click here to download a copy of our poster presented at the NSE conference.
Chou Heads Interdisciplinary Carbon Nanotube Research Project
A team of researchers led by Tsu-Wei Chou, P.S. du Pont Chair of Engineering at UD, recently was awarded a major grant from the National Science Foundation (NSF) for research on carbon nanotubes. The funding from the Nanoscale Interdisciplinary Research Team (NIRT) will support the researchers’ efforts to synthesize, characterize and model aligned nanotube arrays for nanoscale devices and composites. (read more)
126 Spencer Lab |
University of Delaware |
Newark, DE 19716-3140 |
phone 302-831-2421 |
fax 302-831-3619
chou@udel.edu