Phys. Rev. Lett. 81, 176–179 (1998)Electrically Induced Morphological Instabilities in Free Dendrite Growth
See accompanying Physics Focus We describe a new instability mechanism in free dendrite growth, which arises from electrically enhanced diffusion of polar molecules near the dendrite tip. For a small applied potential, the dendrite tip velocity increases slowly with potential, as is described by an extension of normal solvability theory. Above a threshold potential, however, capillarity is insufficient to stabilize growth. We present observations that confirm this instability, which brings about a transition from enhanced normal dendrite growth to a rapidly growing needle morphology with strongly suppressed sidebranching. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.176
DOI:
10.1103/PhysRevLett.81.176
PACS:
68.70.+w, 81.30.Fb
See AlsoComment: Efim A. Brener and H. Müller-Krumbhaar, Comment on “Electrically Induced Morphological Instabilities in Free Dendrite Growth”, Phys. Rev. Lett. 83, 1698 (1999). Reply: K. G. Libbrecht and V. M. Tanusheva, Libbrecht and Tanusheva Reply:, Phys. Rev. Lett. 83, 1699 (1999). |
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