HRTEM image of a singleGe nanocrystal. The image has been rotationally filtered toimprove clarity. The lattice fringes imaged are for Ge 〈111〉,with a d spacing of 3.27 Å. Reaction between the Zintlsalt NaGe and GeCl4 is shown to produce Ge nanocrystals.The reaction proceeds readily in refluxing diglyme at ambientpressure. The nanocrystals produced may be surface-terminated byreaction with RLi or RMgBr and demonstrate quantumconfinement.