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