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.”
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 Latest on: Colloidal crystal engineering
via Google News
The Latest on: Colloidal crystal engineering
- Colloidal quantum dots make LEDs shine bright in the infrared on December 5, 2018 at 12:50 pm
Colloidal Quantum Dots (CQDs) are extremely small semiconductor particles or crystals, as small as a few nanometers ... thanks to the very low trap density as well as to a novel engineering approach o... […]
- MIT researchers 3D print colloidal crystals through direct-write colloidal assembly on August 30, 2018 at 12:49 pm
3D-printed colloidal crystals viewed under a light microscope ... a graduate student in MIT's Department of Materials Science and Engineering. "That's what we're doing at the nanoscale." Using this me... […]
- MIT’s direct-write colloid 3D printing unlocks new possibilities in electronics and energy on August 30, 2018 at 8:42 am
Alvin Tan, a graduate student in MIT’s Department of Materials Science and Engineering ... “We’re essentially 3D-printing crystals.” The results of the team’s most recent work, “Direct‐Write Freeform ... […]
- Researchers 3-D print colloidal crystals on August 30, 2018 at 6:08 am
and associate professor of mechanical engineering A. John Hart. 3-D-printed colloidal crystals viewed under a light microscope. Credit: Felice Frankel Out of the fog Colloids are any large molecules o... […]
- MIT researchers 3-D print colloidal crystals on August 29, 2018 at 9:54 pm
By their direct-write colloidal assembly process, the researchers can build centimeter-high crystals, each made from billions ... a graduate student in MIT’s Department of Materials Science and Engine... […]
- Biomimetic enzyme cascade reaction system in microfluidic electrospray microcapsules on June 15, 2018 at 12:14 pm
State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University ... Fabrication of template silica colloidal crystal beads. The silica colloidal crys... […]
- Image for: Colloidal Quasi-Crystals Discovered on May 24, 2018 at 5:00 pm
Images: Department of Physical Chemistry, University of Bayreuth; free for publication when references are included. (679 KB, 2135 x 1071 pixels) In regard to the use of pictorial material: use of suc... […]
- Phase behaviors of colloidal analogs of bent-core liquid crystals on May 11, 2018 at 11:15 am
3 State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130021, China. 4 Department of Materials Science and Engineering, Univ... […]
- Chemical and Biological Engineering on March 27, 2018 at 5:00 pm
In memory of our colleague, Princeton University’s Department of Chemical Engineering has established the Dudley ... enhanced oil recovery, patterning of colloidal crystals, and fluid behavior in micr... […]
- Chemical and Biological Engineering on March 13, 2018 at 5:00 pm
In addition, we also make Janus particles with varying patch size. Using these different particles, we demonstrate how to make new crystal structures, including diamond and pyrochlore, new surfactant- ... […]
via Bing News