+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Relationship between tribology and optics in thin films of mechanically oriented nanocrystals

, : Relationship between tribology and optics in thin films of mechanically oriented nanocrystals. Journal of the American Chemical Society 134(29): 12245-12251

Many crystalline dyes, when rubbed unidirectionally with cotton on glass slides, can be organized as thin films of highly aligned nanocrystals. Commonly, the linear birefringence and linear dichroism of these films resemble the optical properties of single crystals, indicating precisely oriented particles. Of 186 colored compounds, 122 showed sharp extinction and 50 were distinctly linearly dichroic. Of the latter 50 compounds, 88% were more optically dense when linearly polarized light was aligned with the rubbing axis. The mechanical properties of crystals that underlie the nonstatistical correlation between tribological processes and the direction of electron oscillations in absorption bands are discussed. The features that give rise to the orientation of dye crystallites naturally extend to colorless molecular crystals.


PMID: 22735026

DOI: 10.1021/ja304799a

Other references

Moi V.D.; Bacsy E.; Gaal G.; Rappay G., 1984: Lysosomal enzyme activities in hypo secretory and hyper secretory anterior pituitary cells a combined immuno cytochemical and enzyme cytochemical study. The involvement of lysosomes in ACTH and prolactin secretion was studied. Lysosomes were visualized in the rat anterior pituitary by their nonspecific esterase (gold thioacetic acid technique) or acid phosphatase (Gomori technique) activity. Corti...

Yang, Y.G.; Ohta, S.; Yamada, S.; Shimizu, M.; Takagaki, Y., 1995: Diversity of T-cell receptor delta-chain cDNA in the thymus of one month old germ free pig. 9TH INTERNATIONAL CONGRESS OF IMMUNOLOGY [Author] The 9th International Congress of Immunology : 227

Adams, C.J.; Manley-Harris, M.; Molan, P.C., 2009: The origin of methylglyoxal in New Zealand manuka (Leptospermum scoparium) honey. Methylglyoxal in New Zealand manuka honey has been shown to originate from dihydroxyacetone, which is present in the nectar of manuka flowers in varying amounts. Manuka honey, which was freshly produced by bees, contained low levels of methylglyox...

Becker, R., 1957: Clinical importance of diaphragmatic hernia. Deutsche Zeitschrift für Verdauungs- und Stoffwechselkrankheiten 17(6): 290-298

Mohammed, Y.S.; Osman, M.Y.; Mahfouz, M.M., 1976: Effect of acetylcholine on monoamine oxidase. Biochemical Pharmacology 25(14): 1665-1667

Abrahamson, J.H. (New Zealand), 1981: Method and apparatus for milking. In this teatcup the vacuum applied in the pulsation chamber at the beginning of milking is lower than the vacuum inside the liner, thus causing the liner to close around the teat and consequently preventing milk from entering the milk line, as wel...

Pavlova, N.M., 1934: Classification of the species of red currant on a genetical basis. The literature on the classification on the varieties of the red currant and of the species which have contributed to their origin is reviewed in great detail. The author's own results are then presented, based on the study of the vegetative,...

Martini, I.P., 1971: Regional analysis of sedimentology of Medina Formation (Silurian), Ontario and New York. Bull Am Ass Petrol Geol, 55: 1249-1261

Cai, H.; Wei, W.; Davis, R.E.; Chen, H.; Zhao, Y., 2008: Genetic diversity among phytoplasmas infecting Opuntia species: virtual RFLP analysis identifies new subgroups in the peanut witches'-broom phytoplasma group. INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 58(6): 1448-1457

Marino, J.; Bucher, D.; Beach, M.; Yegneswaran, B.; Cooper, B., 2015: Implementation of an Intensive Care Unit Delirium Protocol: An Interdisciplinary Quality Improvement Project. Delirium is a commonly observed problem for adult patients in the intensive care unit (ICU) that is associated with increased mortality, increased hospital length of stay, and long-term disability of ICU survivors. This makes prevention and prompt...