Folks, I'm self-taught and am currently trying to get up to date about the newest developments in field-emission microscopy and other methods of imaging sub-atomic structures. I'm able to follow (though just barely) Mikhailovskij et al.'s 2009 paper in Physical Review showing electron orbitals in a carbon atom from graphene, but I understand that reliable (and one assumes, replicable) developments in the methodology have potentially now outstripped the methods in that paper. Could someone please recommend resources I could look at that will help me to follow and come further up to date with this, short of my enrolling in a graduate program?--something a little bit beyond a layperson's approach (although I won't object to that either) but not too much more. Many thanks!