Science & Enterprise subscription

Follow us on Twitter

  • A new company, spun off from university biomedical engineering labs, is creating cancer diagnostics by analyzing mi… https://t.co/XvwdRSaAqJ
    about 8 hours ago
  • New post on Science and Enterprise: Start-Up Developing Microbial Cancer Detection Tests https://t.co/jJyKDfFQPz #Science #Business
    about 8 hours ago
  • An NIH award to a biotechnology company funds discovery of drugs that protect brain cells from degenerative disorde… https://t.co/kw5ISn5tuD
    about 14 hours ago
  • New post on Science and Enterprise: Small Biz Grant Advances Neuro Protection Drugs https://t.co/DXGvfbvPek #Science #Business
    about 14 hours ago
  • Why we stopped dynamic banner ads on Science and Enterprise https://t.co/QG5s7V5Nen
    about 18 hours ago

Please share Science & Enterprise

University to Research 3-D Self-Assembly Processes

Jan Genzer (North Carolina State University)

Jan Genzer (North Carolina State University)

Engineers at North Carolina State University in Raleigh received a grant to develop materials that fold themselves into three-dimensional objects when exposed to light. National Science Foundation awarded the four-year, $1.76 million grant to Jan Genzer (pictured right), a chemical engineering professor at NC State.

Genzer says he is assembling a team of “designers, engineers, and mathematicians to advance our understanding of how to manipulate photoresponsive materials.” Potential applications of the technology include the development of hands-free assembly of electronics in a “clean” environment, packaging and manufacturing processes, and air foils used for airdrops of humanitarian supplies.

The researchers plan to conduct experiments and run computational models to better understand the folding process. This research is expected to lead to new three-dimensional structures that can form rapidly while retaining precise control over their shape. The structures will be patterned on two-dimensional substrates, which should make them amenable to high-volume industrial techniques, such as roll-to-roll patterning used in electronics manufacturing.

In earlier work, Genzer and colleagues at NC State created a proof of concept for the process. The researchers printed bold black lines with an ordinary inkjet printer on a pre-stressed plastic sheet. The material was then cut into a desired pattern and placed under an infrared light, such as a heat lamp. The printed black lines absorbed more energy from the infrared light than the rest of the material, causing the plastic to contract. That contraction creates a hinge that folded the sheets into 3-D shapes.

Genzer’s team also devised a computer model for the process that showed the surface temperature of the hinge must exceed the point at which the material begins to soften, called the glass transition temperature. The model also showed the heat has to be localized to the hinge to have the folding happen quickly and effectively. No folding happens if the entire piece of the material is heated to the glass transition temperature.

The following video demonstrates Genzer’s earlier work, to piano accompaniment.

Read more:

*     *     *

Comments are closed.