Microscopy from Scientific Research

CO-tipped STM imaging of cellohexaose assembly on Au(111) surface. (a) CO-tipped STM images were obtained for non-annealed sample as constant current STM images using a CO-functionalized tip at 6 K. Comparing CO-tipped STM image and DFT optimized structures enables the clear identification of cellohexaose Doublet (d) and Triplet (t) structures on surface. CO-tipped imaging permitted the characterization of the glycosidic bonds in Panel (b), pyranose rings in Panel (c), as well as the intermolecular interactions between cellohexaose molecules in the ordered assemblies in Panel (d). We only show cellohexaose in its Doublet state in Panel (b–d) because they were the only species found on surface after annealing.

DOI