TY - JOUR
T1 - Self-assembled triangular and labyrinth buckling patterns of thin films on spherical substrates
AU - CAO, Guoxin
AU - CHEN, Xi
AU - LI, Chaorong
AU - JI, Ailing
AU - CAO, Zexian
N1 - The numerical study of this research was supported by NSF No. CMMI-0643726, while the experimental work was financed by the NSFC, the Science Foundation of ZSTU, and the Civil Space Exploration Program of China.
PY - 2008/1/25
Y1 - 2008/1/25
N2 - We investigated the possibility of controlling thin film buckling patterns by varying the substrate curvature and the stress induced therein upon cooling. The numerical and experimental studies are based on a spherical Ag core/SiO2 shell system. For Ag substrates with a relatively larger curvature, the dentlike triangular buckling pattern comes out when the film nominal stress exceeds a critical value. With increasing film stress and/or substrate radius, the labyrinthlike buckling pattern takes over. Both the buckling wavelength and the critical stress increase with the substrate radius. © 2008 The American Physical Society.
AB - We investigated the possibility of controlling thin film buckling patterns by varying the substrate curvature and the stress induced therein upon cooling. The numerical and experimental studies are based on a spherical Ag core/SiO2 shell system. For Ag substrates with a relatively larger curvature, the dentlike triangular buckling pattern comes out when the film nominal stress exceeds a critical value. With increasing film stress and/or substrate radius, the labyrinthlike buckling pattern takes over. Both the buckling wavelength and the critical stress increase with the substrate radius. © 2008 The American Physical Society.
UR - http://www.scopus.com/inward/record.url?scp=38549181873&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.100.036102
DO - 10.1103/PhysRevLett.100.036102
M3 - Journal Article (refereed)
SN - 0031-9007
VL - 100
JO - Physical Review Letters
JF - Physical Review Letters
IS - 3
M1 - 36102
ER -