Spectroscopic and AFM studies on the structures of pseudoisocyanine J aggregates at a mica/water interface

Article Abstract:

J aggregates of a pseudoisocyanine dye (PIC) at a mica/solution interface were found in situ in solutions for the first time by atomic force microscopy (AFM). The J aggregates have a three-dimensional island structure with the height of approximately 3-6 nm, composed of at least 10(super 6) PIC molecules, but not a two-dimensional monolayer structure. The growth processes of the J aggregates were examined based on the morphological changes of the islands with a dye concentration, while the optical characteristics such as the absorption peak position, line width or fluorescence lifetime were unaltered.

Research, Dyes and dyeing, Dyeing, Dyes, Mica, Spectroscope, Spectroscopes

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Chain structures of surface hydroxyl groups formed via line oxygen vacancies on TiO(sub 2)(110) surfaces studied using noncontact atomic force microscopy

Article Abstract:

Structures of surface hydroxyl groups arranged on a reduced TiO(sub 2)(110) surface that had line oxygen vacancies were studied using noncontact atomic force microscopy (NC-AFM). NC-AFM results revealed that by increasing the density of oxygen vacancies on the TiO(sub 2)(110) surface, line oxygen were formed by removal of oxygen atoms in a bridge oxygen row on the TiO(sub 2)(110) surface.

Hydroxides, Atomic properties

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Oxygen-atom vacancies imaged by a noncontact atomic force microscope operated in an atmospheric pressure of N2 gas

Article Abstract:

The topography of the rutile TiO2(110) surface was observed with a noncontact atomic force microscope (NC-AFM) in an atmospheric pressure of N2. It was found that oxygen-atom rows arrayed with an interval of 0.65 nm.

Industrial Gas Manufacturing, Industrial gases, Nitrogen, Chemical properties

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