Open AccessMaterial patterning on substrates by manipulation of fluidic behavior
Author(s) -
Yitan Li,
Hao Wang,
Henglu Xu,
Shiting Wu,
Xuemei Li,
JinTao Yu,
Chih-Hsin Huang,
Zeyao Zhang,
Hao Sun,
Lu Han,
Meihui Li,
Anyuan Cao,
Pan Zhang,
Yudong Li
Publication year - 2019
Publication title -
national science review/national science review
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.433
H-Index - 54
eISSN - 2095-5138
pISSN - 2053-714X
DOI - 10.1093/nsr/nwz034
Subject(s) - fluidics , marangoni effect , materials science , nanotechnology , substrate (aquarium) , fabrication , evaporation , vortex , microfluidics , nanomaterials , crystallization , aerospace engineering , mechanics , chemical engineering , medicine , oceanography , physics , convection , alternative medicine , pathology , geology , engineering , thermodynamics
Patterned materials on substrates are of great importance for a wide variety of applications. In solution-based approaches to material patterning, fluidic flow is inevitable. Here we demonstrate not only the importance of fluidic behavior but also the methodology of engineering the flow pattern to guide the material crystallization and assembly. We show by both experiment and simulation that substrate heating, which is generally used to accelerate evaporation, produces irregular complex vortexes. Instead, a top-heating-bottom-cooling (THBC) set-up offers an inverse temperature gradient and results in a single Marangoni vortex, which is desired for ordered nanomaterial patterning near the contact line. We then realize the fabrication of large-scale patterns of iodide perovskite crystals on different substrates under THBC conditions. We further demonstrate that harnessing the flow behavior is a general strategy with great feasibility to pattern various functional materials ranging from inorganic, organic, hybrid to biological categories on different substrates, presenting great potential for practical applications.