title: Near-field scanning optical microscopy of zinc-porphyrin crystals.
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.
authors.affiliation: Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana 61801, USA.
authors.forename: R
authors.initials: R
authors.lastname: Brunner
authors.forename: M E
authors.initials: ME
authors.lastname: Kosal
authors.forename: K S
authors.initials: KS
authors.lastname: Suslick
authors.forename: R
authors.initials: R
authors.lastname: Lamche
authors.forename: O
authors.initials: O
authors.lastname: Marti
authors.forename: J O
authors.initials: JO
authors.lastname: White
mesh_terms: D003460:Crystallization; D008665:Metalloporphyrins / Q000737:chemistry*; D018625:Microscopy, Atomic Force / Q000379:methods*; D008856:Microscopy, Fluorescence / Q000379:methods*; D015032:Zinc / Q000737:chemistry*
chemical_list: D008665:Metalloporphyrins; D015032:Zinc