Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (1): 133-138.doi: 10.1007/s40242-023-2325-9

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Transpiration-inspired Capillary for Synchronous Synthesis and Patterning of Silver Nanoparticles

CHEN Bingda1, ZHANG Zelong3, SU Meng1,2, QIN Feifei3,4, PAN Qi1, XIE Daixi1,2, YANG Xu1,2, ZHANG Kun1,2, ZHANG Zeying1, XIE Hongfei1,2, CARMELIET Jan4, SONG Yanlin1,2   

  1. 1. Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing National Laboratory for Molecular Sciences(BNLMS), Beijing, 100190, P. R. China;
    2. University of Chinese Academy of Sciences, Beijing, 100049, P. R. China;
    3. Institute of Extreme Mechanics and School of Aeronautics, Northwestern Polytechnical University, Xi’an, 710072, P. R. China;
    4. Chair of Building Physics, Department of Mechanical and Process Engineering, ETH Zürich, Zürich, 8092, Switzerland
  • Received:2022-11-30 Online:2023-02-01 Published:2023-02-02
  • Contact: SU Meng, SONG Yanlin E-mail:sumeng1988@iccas.ac.cn;ylsong@iccas.ac.cn
  • Supported by:
    This work was supported by the National Key R&D Program of China (No.2018YFA0208501), the Fund of Youth Innovation Promotion Association CAS, China (No.2020032), the Fund of Beijing Nova Program from Beijing Municipal Science & Technology Commission, China(Nos.Z201100006820037, Z211100002121001), the National Natural Science Foundation of China(Nos.52222313, 22075296, 91963212, 51961145102), the Fund of Beijing National Laboratory for Molecular Sciences, China(No.BNLMS-CXXM-202005). QIN Feifei and CARMELIET Jan acknowledge the Swiss National Super Computing Center(No.s1081) for providing the computing support.

Abstract: Traditional synthesis strategy of nanomaterials with complicated process and high cost limits their applications. Here, we propose a facile process for the synchronous synthesis and patterning of silver nanoparticles(Ag NPs) through the self-driven microchannel reactor with the capillary effect inspired by transpiration. The evaporation contributes to capillary and accumulation effects in the microchannels. The silver reactant-containing droplets can be spontaneously divided and distributed in multiple microchannels during the whole fabrication process by the capillary effect. The newly formed Ag NPs at the gas-liquid interface can be assembled on both sides of the microchannels by the accumulation effect. The capillary effect decreases the disturbances, which ensures the uniformity of the patterning. By the combination of microchannels with different widths, various Ag NPs-assembled patterns with stable electrical properties are achieved. This efficient strategy with a simple fabrication procedure is towards the technological engineering of nanoscale architected materials.

Key words: Transpiration, Capillary effect, Droplet manipulation, Nanoparticle, Patterning