This lecture covers wavefunction engineering techniques and applications, focusing on quantum holography, coherent control of electron wavefunctions, and the manipulation of vortex beams. The instructor discusses topics such as the interaction of electrons with light fields, the split of electron wavefunctions in quantum ladders, and the generation of electron vortex beams. Applications of these techniques include twisted neutrons, nuclear reactions control, and the use of vortex beams for magnetic sensing. The lecture also explores the coherent control of nuclear reactions through orbital electron capture and the experimental implementation of nuclear batteries.