Liu's group sits at the junction of DNA nanotechnology and nanophotonics: DNA-origami-templated plasmonic assemblies, reconfigurable artificial nanomachines whose motion is read out optically (chiral plasmonics, FRET), and, increasingly, synthetic-cell systems -- DNA-based pores and a programmable DNA-origami nanosyringe for directed membrane translocation, the latter published jointly with Nussberger's biophysics group at Stuttgart. The through-line is building nanoscale machines that both actuate and report. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), the relevance is on the biosensing axis: this is the group that can put a nanoscale probe exactly where you want it on or through a membrane, which is the delivery problem that in-cell quantum sensing keeps running into. Preferred-attribute note: nanofabrication is heavily used, but the emphasis is on single-molecule optical readout rather than device manufacture per se.