期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 43, 页码 38117-38124出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b10359
关键词
hydrophilic-hydrophobic; microdroplet array; photonic crystal beads; breath-taking; invisible patterns
资金
- National Natural Science Foundation of China [21404116, 51475451]
- Special Support Project for Outstanding Young Scholars of Guangdong Province [2015TQ01R292]
- Guangdong-Hong Kong Technology Cooperation Funding [2017A050506040]
- Shenzhen Science and Technology Innovation Committee [JCYJ20150316144521974]
- Guangdong Innovative and Entrepreneurial Research Team Program [2013S046]
- Shenzhen Peacock Plan
- Jiangsu Key Laboratory for Carbon-Based Functional Materials AMP
- Devices, Soochow University
Surfaces patterned with hydrophilic and hydrophobic regions provide robust and versatile means for investigating the wetting behaviors of liquids, surface properties analysis, and producing patterned arrays. However, the fabrication of integral and uniform arrays onto these open systems remains a challenge, thus restricting them from being used in practical applications. Here, we present a simple yet powerful approach for the fabrication of water droplet arrays and the assembly of photonic crystal bead arrays based on hydrophilic-hydrophobic patterned substrates. Various integral arrays are simply prepared in a high-quality output with a low cost, large scale, and uniform size control. By simply taking a breath, which brings moisture to the substrate surface, complex hydrophilic-hydrophobic outlined images can be revisualized in the discontinuous hydrophilic regions. Integration of hydrogel photonic crystal bead arrays into the breath-taking process results in breath-responsive photonic crystal beads, which can change their colors upon a mild exhalation. This state-of-the-art technology not only provides an effective methodology for the preparation of patterned arrays but also demonstrates intriguing applications in information storage and biochemical sensors.
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