van der Waals clusters

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• Van der Waals molecule — A van der Waals molecule is a stable cluster consisting of two or more molecules held together by van der Waals forces or by hydrogen bonds. The name originated in the beginning of the 1970s when stable molecular clusters were regularly observed… …   Wikipedia

• Molecular clusters — Atomic and molecular clusters are aggregates of 5 105 atomic or molecular units. They classify according to the forces holding them together: Van der Waals clusters attraction between induced electric dipoles and repulsion between electron cores… …   Wikipedia

• cluster — clusteringly, adv. clustery, adj. /klus teuhr/, n. 1. a number of things of the same kind, growing or held together; a bunch: a cluster of grapes. 2. a group of things or persons close together: There was a cluster of tourists at the gate. 3. U.S …   Universalium

• Metal-organic framework — Metal Organic Frameworks are crystalline compounds consisting of metal ions or clusters coordinated to often rigid organic molecules to form one , two , or three dimensional structures that can be porous. In some cases, the pores are stable to… …   Wikipedia

• chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

• Colloid — Milk is an emulsified colloid of liquid butterfat globules dispersed within a water based solution. A colloid is a substance microscopically dispersed evenly throughout another substance.[1] A colloidal system consists of two separate phases: a… …   Wikipedia

• Beaker culture — The Bell Beaker culture (sometimes shortened to Beaker culture, Beaker people, or Beaker folk; de. Glockenbecherkultur), ca. 2800 ndash; 1900 BC, is the term for a widely scattered cultural phenomenon of prehistoric western Europe starting in the …   Wikipedia

• Cluster (Physik) — Kohlenstoffcluster C540 C540 ist aufgrund seiner enormen Größe eine sehr labile sphärische Struktur, weil sie eben nur sphärisch ist. Solche großen Fullerene sind daher nur in Verbindung mit C60, C70 und größeren Fullerenen als sogenannte… …   Deutsch Wikipedia

• Intermolecular force — Intermolecular forces (forces between two molecules) are weak compared to the intramolecular forces (forces keeping a molecule together). For example, the covalent bond present within HCl molecules is much stronger than the forces present between …   Wikipedia

• Giacinto Scoles — (b. 1935 in Torino, Italy) is a European North American chemist and physicist who is best known for his pioneering development of molecular beam methods for the study of weak van der Waals forces between atoms, molecules, and surfaces. He… …   Wikipedia

• MOLÉCULAIRES (JETS ET FAISCEAUX) — La propagation de particules neutres sous forme de faisceaux a permis de vérifier les bases de la physique moderne au cours d’expériences effectuées surtout de 1920 à 1930 à l’aide de faisceaux de première génération, les faisceaux moléculaires… …   Encyclopédie Universelle