6 research outputs found
Picosecond Electronic Relaxation in CdS/HgS/CdS Quantum Dot Quantum Well Semiconductor Nanoparticles
Discovery of Ultra-Crack-Resistant Oxide Glasses with Adaptive Networks
Despite
their transformative role in our society, oxide glasses
remain brittle. Although extrinsic postprocessing techniques can partially
mitigate this drawback, they come with undesirable side effects. Alternatively,
topological engineering offers an attractive option to enhance the
intrinsic strength and damage resistance of glass. On the basis of
this approach, we report here the discovery of a novel melt-quenched
lithium aluminoborate glass featuring the highest crack resistance
ever reported for a bulk oxide glass. Relying on combined mechanical
and structural characterizations, we demonstrate that this unusual
damage resistance originates from a significant self-adaptivity of
the local atomic topology under stress, which, based on a selection
of various oxide glasses, is shown to control crack resistance. This
renders the lithium aluminoborate glass a promising candidate for
engineering applications, such as ultrathin, yet ultrastrong, protective
screens