Taking a page from Jonathan Swift's "Gulliver's Travels", a team of scientists has created malleable and microscopic self-assembling particles that can serve as the next generation of building blocks in the creation of synthetic materials.
"Our work turns the tiniest of particles from inflexible, Lego-like pieces into ones that can transform themselves into a range of shapes," explains Stefano Sacanna, an assistant professor in NYU's Department of Chemistry and the senior author of the paper, which appears in the journal Nature Communications. "With the ability to change their contours, these particles mimic alterations that occur in nature."
A team of NYU chemists has created malleable and microscopic self-assembling particles that can serve as the next generation of building blocks in the creation of synthetic materials. The research focused on engineering particles a micrometer in width -- about 1/200th the width of a strand of human hair (on which the particles [pink and blue] are placed in the above image).
Image courtesy of the Sacanna lab.
The research focused on engineering particles a micrometer in width--about 1/200th the width of a strand of human hair.
Specifically, it aimed to enhance the adaptability of colloids--small particles suspended within a fluid medium. Such everyday items such as paint, milk, gelatin, glass, and porcelain are composed of colloidal dispersions, but it's their potential to control the flow of light that has scientists focused on creating exotic colloidal geometries.
By triggering specific morphological changes in the singular colloidal unit, the Sacanna group hopes to advance colloidal crystal engineering.
The scientists discovered that, much like Gulliver tied down by Lilliputians, metallic particles encased in oil droplets were tethered by many chemical bonds. Breaking those tethers via a photocatalytic reaction--in which the absorption of light spurs a chemical response--caused the metallic particle to free itself, producing an overall shape change. In other words, shining a light on a simple crystal allowed the scientists to create a material that transforms its microstructure.
The study's other authors were: Mena Youssef and Theodore Hueckel, both NYU doctoral students, and Gi-Ra Yi, a professor at South Korea's Sungkyunkwan University.
This work was supported by the MRSEC Program of the National Science Foundation (DMR-1420073).
James Devitt | EurekAlert!
Scientists spin artificial silk from whey protein
24.01.2017 | Deutsches Elektronen-Synchrotron DESY
Choreographing the microRNA-target dance
24.01.2017 | UT Southwestern Medical Center
A Swedish-German team of researchers has cleared up a key process for the artificial production of silk. With the help of the intense X-rays from DESY's...
For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
24.01.2017 | Physics and Astronomy
24.01.2017 | Life Sciences
24.01.2017 | Health and Medicine