Intermolecular and surface forces pdf

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intermolecular and surface forces pdf

Intermolecular Forces | SpringerLink

Rather than acting by modifying van der Waals or electrostatic double layer interactions or by directly bridging neighboring molecules, polyvalent ligands bound to DNA double helices appear to act by reconfiguring the water between macromolecular surfaces to create attractive long range hydration forces. We have reached this conclusion by directly measuring the repulsive forces between parallel B-form DNA double helices pushed together from the separations at which they have self organized into hexagonal arrays of parallel rods. For all of the wide variety of "condensing agents" from divalent Mn to polymeric protamines, the resulting intermolecular force varies exponentially with a decay rate of 1. Such behavior qualitatively contradicts the predictions of all electrostatic double layer and van der Waals force potentials previously suggested. It fits remarkably well with the idea, developed and tested here, that multivalent counterion adsorption reorganizes the water at discrete sites complementary to unadsorbed sites on the apposing surface. The measured strength and range of these attractive forces together with their apparent specificity suggest the presence of a previously unexpected force in molecular organization.
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Intermolecular Forces - A-level Chemistry - OCR, AQA, Edexcel

Intermolecular forces IMF are the forces which mediate interaction between molecules , including forces of attraction or repulsion which act between molecules and other types of neighboring particles, e. Intermolecular forces are weak relative to intramolecular forces — the forces which hold a molecule together.

Intermolecular force

Use the link below to share a full-text version of this article with your friends and colleagues. Learn more. Volume 90 , Issue The full text of this article hosted at iucr. If you do not receive an email within 10 minutes, your email address may not be registered, and you may need to create a new Wiley Online Library account. If the address matches an existing account you will receive an email with instructions to retrieve your username.

Part I: 1. Historical Perspective; 2. Thermodynamic and Statistical Aspects of Intermolecular Forces; 3. Interactions Involving Polar Molecules; 5. Interactions Involving the Polarization of Molecules; 6.

3rd Edition

Intermolecular and Surface Forces describes the role of various intermolecular and interparticle forces in determining the properties of simple systems such as gases, liquids and solids, with a special focus on more complex colloidal, polymeric and biological systems. The book provides a thorough foundation in theories and concepts of intermolecular forces, allowing researchers and students to recognize which forces are important in any particular system, as well as how to control these forces. This third edition is expanded into three sections and contains five new chapters over the previous edition. Research workers and students in materials science, especially in biomaterials and polymers, and applied physicists working in these fields. Thermodynamic and Statistical Aspects of Intermolecular Forces 2.

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    Intermolecular and Surface Forces - Jacob N Israelachvili - Bok () | Bokus

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