Metal Assisted Chemical Etching patterns at a Ge/Cr/Au interface modulated by the Euler instability

Autor:	Wong, Yilin, Zocchi, Giovanni
Rok vydání:	2024
Předmět:	Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Nonlinear Sciences - Pattern Formation and Solitons
Druh dokumentu:	Working Paper
Popis:	We present a solid state system which spontaneously generates remarkable engraving patterns on the surface of Ge. The layered construction, with a metal film on the Ge surface, results in coupling of the metal catalyzed etching reaction with the long range stress field at the Ge - metal interface. The etching patterns generated have similarities with Turing patterns, hydrodynamic patterns, crack propagation, and biological form. We describe spirals, radial patterns, and more disordered structures. Euler buckling of the metal layer generates a characteristic wavelength for some patterns. Comment: 5 pages 4 figures plus Supplementary Materials (5 pages 9 figures)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2405.20544 Zobrazit plný text záznamu View this record from Arxiv