  It is now possible to routinely perform atomistic simulations at the
microsecond timescale. In the present work, we exploit this for a model binary
Lennard-Jones glass to study structural relaxation at a timescale spanning up
to 80 microseconds. It is found that at these longer time-scales, significant
mobility and relaxation occurs, demonstrating a reproducible relaxation
trajectory towards a class of asymptotic structural states which are strongly
heterogeneous. These structures are discussed both in terms of the ideal glass
state and a production route towards novel amorphous crystalline nano-composite
micro-structures with strong interface stability.
