THIS WEEK IN SCIENCE

摘要

Large changes in conformation can be expected to change the conductivity of a molecule; in device applications, small changes can help maintain geometries favorable for bonding the molecule to its contacts or allowing it to interact with other switching molecules. Liljeroth et al. (p. 1203) show that the position of the two internal hydrogen atoms on the inner cavity of free-base naphthalocyanine molecules can be switched under cryogenic conditions using the tip of a scanning tunneling microscope (STM).