Diamond-graphene hybrid nanoscale quantum sensor achieves 2X enhancement in coherence time of shallow nitrogen-vacancy center spins
https://www.eurekalert.org/news-releases/1089302 "high sensitivity sensing for weak magnetic signals at room temperature... shallow NV centers close to diamond surface greatly enhances spatial resolution, but electric or magnetic noise from unpaired electron spins at surface significantly reduces coherence time... suppressing noise requires additional microwave manipulation, overcome by covering monolayer graphene on diamond surface/ heterogeneous interface hybridization modulating density and relaxation time of surface electron spins... 2D material/ interfaces"