Fig. 1.

Plasmon-induced phase transformation in the antenna-reactor configuration. a Schematic of the light-coupled environmental transmission electron microscope (ETEM) with an Au nanodisc array and Pd nanocubes on a Si₃N₄ membrane. b Representative TEM image of an antenna-reactor pair. Scale bar is 50 nm. c Aberration-corrected TEM image of a representative single-crystalline Pd nanocube on an ultrathin carbon substrate, including a zoomed-in view of the lattice and its corresponding Fourier transform. Scale bars are 10 nm and 2 nm respectively. d Schematic of the β to α phase transformation reaction under study