Semiconductor nanocrystals are sensitive to air and solvents, which hinders wet-chemical processing under ambient conditions.
This problem has limited the scaling of nanocrystal device dimensions and large-scale device integration achievable by conventional processing.
The mechanical failure of amorphous systems is not well understood, but recent work by Liu and co-workers suggests that low-frequency vibrational modes are concentrated in localized regions, or “soft spots,” that are prone to rearrange.
Disordered nanoparticle assemblies constitute an important class of materials that have numerous applications in energy conversion and storage, electronics, photonics, and sensing. Unfortunately, however, such assemblies tend to fracture and abrade under small loads, significantly limiting their widespread use.
Dendrimers are highly branched molecules. Amphiphilic glycodendrimers have been synthesized for the first time. These macro-molecules have tunable carbohydrate head groups and hydrophobic tails. The precise architecture of the dendrimers facilitates assembly of precise structures, including vesicles (glycodendrimersomes).
Electron microscopy reveals the fundamental steps of bending
Addition of rubber particles to epoxy thermosets has been successful for toughening these brittle materials.
Using a series of acceptor-polymer-acceptor triads, IRG-2 investigators have measured intramolecular exciton diffusion in poly-3(hexylthiophene) (P3HT) for the first time.
