Sum frequency generation microscopy of microcontact-printed mixed self-assembled monolayers.

摘要: Sum frequency generation imaging microscopy (SFGIM) is used to image the chemically distinct regions of a microcontact-printed monolayer surface. The contrast in images based on vibrational spectrum each component monolayer. Mixtures C16 thiols gold with CH3 and phenyl termination are imaged resolution ∼10 μm. Microcontact printing produces films that different compared immersion procedure forming self-assembled monolayers. SFGIM technique able obtain at point surface demonstrate stamped area has significant mixing molecules deposited from backfilling solution.