Author/Authors :
Brunner، نويسنده , , Robert and E. Kosal، نويسنده , , Margaret and Suslick، نويسنده , , Kenneth S and Lamche، نويسنده , , Ralf and Marti، نويسنده , , Othmar and White، نويسنده , , Jeffrey O، نويسنده ,
Abstract :
Using a near-field scanning optical microscope (NSOM), crystals of zinc-porphyrin network materials are characterized with respect to morphology and fluorescence. Needle-shaped crystals are observed. While the topography is flat, the fluorescence intensity profile in the width direction is approximately triangular. A numerical calculation shows that differences between the topographic and optical images cannot be due to an artifact. In some needle-shaped crystals, the fluorescence emission is strongly peaked at one or both ends, possibly indicating a polar crystal structure.
