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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Hamaker constant ： ウィキペディア英語版 Hamaker constant The Hamaker constant A can be defined for a Van der Waals (VdW) body-body interaction: :$A=\backslash pi^2\backslash times\; C\; \backslash times\; \backslash rho\_1\; \backslash times\; \backslash rho\_2$ where $\backslash rho\_1$ and $\backslash rho\_2$ are the number of atoms per unit volume in two interacting bodies and C is the coefficient in the particle-particle pair interaction.〔Seung-woo Lee and Wolfgang M. Sigmund."AFM study of repulsive Van der Waals forces between Teflon AF thin film and silica or alumina." Colloids and Surfaces A: Physicochemical and Engineering Aspects. Volume 204, Issues 1-3, 23 May 2002, Pages 43–50〕 The Hamaker constant provides the means to determine the interaction parameter C from the Van der Waals pair potential, $w(r)=-C/r^6$. Hamaker's method and the associated Hamaker constant ignores the influence of an intervening medium between the two particles of interaction. In the 1950s Lifshitz developed a description of the VdW energy but with consideration of the dielectric properties of this intervening medium (often a continuous phase). The Van der Waals forces are effective only up to several hundred angstroms. When the interactions are too far apart the dispersion potential decays faster than $1/r^6$; this is called the retarded regime and the result is a Casimir–Polder force. ==See also== *Hamaker theory *Van der Waals Forces *Intermolecular forces 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hamaker constant」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.