Selective growth and ordering of self-assembly on metal/polymer thin-film heterostructures via photothermal modulation

被引:8
|
作者
Kim, Yun Young [1 ]
Huang, Qiaojian [1 ]
Krishnaswamy, Sridhar [1 ]
机构
[1] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA
基金
美国国家科学基金会;
关键词
internal stresses; laser materials processing; metal-insulator boundaries; metallic thin films; optical modulation; pattern formation; photothermal effects; polymer films; self-assembly; thermomechanical treatment; vacuum deposited coatings; vacuum deposition; PATTERN-FORMATION;
D O I
10.1063/1.3374322
中图分类号
O59 [应用物理学];
学科分类号
摘要
We show photothermal perturbation of morphology on planar aluminum/polymethyl methacrylate films, leading to alignment of location-specific self-assembled patterns. Local laser heating regularizes pattern formation in a selected area by inducing compressive stress in the metal layer as well as partial relaxation in the underlying polymer layer. Furthermore, this thermomechanical process enables the formation of complex structures such as line-gratings and concentric rings when an interferometric heating scheme is employed. Our photolithography-free technique achieves the spatial selectivity and controllability of growth initiation, providing a simpler way for bottom-up fabrication approach for integration of multicomponent devices.
引用
收藏
页数:3
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