There is an abiding interest in using nanocrystals as laser gain media due to their tunable emission wavelengths, low cost, and solution processability. However, it has been proven difficult to achieve low lasing thresholds suitable for practical applicatons.
We introduced the concept of plate mechanical metamaterials [1] and its initial realization in the form of freestanding corrugated plates made out of ultrathin films.
The NSF has awarded additional funds to support helium conservation in the Property Measurement Shared Experimental Facility (SEF). The SEF hosts over a dozen low temperature measurement capabilities requiring liquid helium.
Optimum function of plasmonic nanocrystal in assembly requires precision control of separation. Often, larger separations are desired while still maintaining order. With our COMPASS collaborators, Hough and Donnio, IRG-4 has developed a new class of building blocks that incorporate dendrimer ligands.
A metal spoon can bend in half without breaking because of defects in its crystalline structure. By contrast, a metal spoon with atoms in a disordered structure—a metallic glass spoon—would break via a catastrophic brittle fracture. Here we show that disordered packings of particles ranging in size from atoms, as in a metallic glass, to nanoparticles to micron-sized colloids to centimeter-siz
To increase our online presence, we are recording nearly all outreach presentations and making them available on our website (www.lrsm.upenn.edu/outreach/videos). These include Science Cafes, PREM seminars (given usually in Spanish), and various other events.
Harvard hosted its first ever “Top Chef” competition, as part of Science and Cooking: From Haute Cuisine to Soft Condensed Matter, now in its sixth year as a highly popular undergraduate course at Harvard.
Shape morphing systems may find potential application in smart textiles, autonomous robotics, biomedical devices, drug delivery and tissue engineering. Lewis and Mahadevan at the Harvard MRSEC have developed 4-D printing by creating a hydrogel-cellulose fibril ink that could be printed to induce a programmable shape change
A dendrimer is a synthetically made branched molecule. In this work, a family of amphiphilic Janus dendrimers bearing precise carbohydrate residues arranged in a defined sequence – glycodendrimers – were used to make vesicles that could be agglutinated by naturally occurring lectins that binds to carbohydrates. The lectins, called galectins, are human adhesion and growth regulatory lectins.
The 6th annual Philadelphia Materials Day was held on Saturday, February 6, 2016 at the Bossone Research Center at Drexel University. This joint venture between Penn and Drexel Universities was attended by over 1100 students and parents. Each year faculty and their students present demos on materials-related themes of interest to K-12 students.
