  Atomic undercoordination fascinates defects, surfaces, and nanostructures in
electronic binding energy, lattice oscillation frequency, elasticity and
plasticity (IHPR), thermal stability, photon emisibility, reactivity,
dielectrics, super-hydrophobicity, spin-resolved topological edge and monolayer
high-TC superconductivity, etc., through local bond contraction, quantum
entrapment and polarization.
