Using gold nanoparticles to trigger sequential unfolding of 3-D structures

phys.org | 6/18/2018 | Staff
trainman (Posted by) Level 3
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Researchers from North Carolina State University have developed a new technique that takes advantage of gold nanoparticles to trigger the sequential unfolding of three-dimensional structures using different wavelengths of light.

Specifically, the technique makes use of the fact that different shapes of gold nanoparticles convert different wavelengths of light into heat.

Instance - Researchers - Gold - Nanospheres - Nanorods

In this instance, researchers embedded gold nanospheres and nanorods into different areas of a shape memory polymer. The polymer can then be folded into a desired shape. When exposed to light wavelengths of 530 nanometers (nm), or green light, the folds in the part embedded with nanospheres unfold. When exposed to wavelengths of 860 nm, or near infrared, the nanorod-embedded regions unfold.

"This approach can be used at room temperature, and allows for significant flexibility, since you can control the wavelength that the material responds to by manipulating the shape of the gold nanoparticles,"...
(Excerpt) Read more at: phys.org
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