Previous Work

Project wins 1st Place Industry Award at 10th Annual (2009) OSU Engineering Expo

Senior Project Proposal:  Piezoelectric Nanowires

Recent results from Georgia Tech have shown that strands of Kevlar enhanced with radially grown ZnO nanowires create small amounts of piezoelectric power from mechanical motion. This research can lead to smaller, on-board, energy sources, which could be used for various applications. For example, having a small nanogenerator incorporated into exercise clothing or equipment to power an iPod during a workout. Possible applications could be different types of small sensors, which could have increased mobility because their power source moves with them.

Despite the great promise of this work, there is controversy as to whether the acquired results are repeatable; this multi-disciplinary project will look at the chemical, mechanical and electrical engineering aspects. We propose an experimental setup similar to Georgia Tech’s in order to determine the viability of this novel application of nanotechnology. Depending on the measured electrical output, we shall also suggest a production method to maximize energy density per unit area.

This work will performed by a core team of three undergraduate students working on their Senior Design Project as well as many graduate students and professors as mentors.

The project would necessitate:

  • (i) Preparation of nano-enhanced string by low-temperature growth of ZnO NWs on Kevlar strands. Different growth methods will be tested and optimized for piezoelectric generation.
  • (ii) Creating an electrical system and designing associated sub-circuits. This includes connecting functionalized string to a sensor circuit that can detect any electricity that may be generated. Due to the expected output current being in the picoampere range, the sensor must be designed and calibrated for very low noise.
  • (iii) Designing a mechanical actuator to apply a controlled amount of input energy to the nano-enhanced strings.
  • (iv) Developing a hypothesis and theory that explains experimental results. This includes providing suggestions for further research, such as other materials or structures that might improve power density.