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Two states of C60 film at the air/water interface

✍ Scribed by A.A. Kharlamov; L.A. Chernozatonskii; A.A. Dityat'ev

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
426 KB
Volume
219
Category
Article
ISSN
0009-2614

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✦ Synopsis

Surface pressure-area isotherms of Cbo film were investigated at the air/water interfaces. It was established that the CsO film can exist in two states with different reversible isotherms. The first state can be realized in the region of the lower surface pressure below 5 mN/m with no initial compression up to high pressure; the second state can be obtained after initial compression above 10 mN/m. The irreversible decrease of the "area per molecule" from 23-28 A* down to 21-22 A2 may be explained by the formation of Cso molecular crystallites.

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An equation of state has been derived for a homogeneous layer of protein at the air/buffer interface. This equation includes the contribution of counterions and of the polypeptide backbone viewed as a polymer. The contribution of the polypeptide chain is derived using scaling laws. The equation has