Controlled 3D nanoparticle deposition by drying of colloidal suspension in designed thin micro-porous architectures. (September 2020)

• Record Type: Journal Article
• Authors: Qin, Feifei; Su, Meng; Zhao, Jianlin; Mazloomi Moqaddam, Ali; Carro, Luca Del; Brunschwiler, Thomas; Kang, Qinjun; Song, Yanlin; Derome, Dominique; Carmeliet, Jan
• Is Part Of: International journal of heat and mass transfer. Volume 158(2020)
• Publication Date: 2020-09
• Subjects: 3D nanoparticle deposition -- Thin micro-porous architectures -- Drying -- Lattice Boltzmann modeling; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2020.120000
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: Joint numerical and experimental research on nanoparticle deposition was conducted. Geometry design and surface wettability change are proposed for deposition control. Desired global and local 3D nanoparticle deposition configurations were obtained. Uniform and concentrated depositions were achieved with different designs. Underlying mechanisms of fluid flows, phase change and mass transport are revealed. ABSTRACT: Nanoparticle deposition by drying of colloidal suspension in thin micro-porous architectures has attracted a lot of attention in scientific research as well as industrial applications. However, the underlying mechanisms of such three-dimensional (3D) deposition are not yet fully revealed due to the complexity of the co-occurring processes of two-phase fluid flows, phase change and mass transport. Consequently, the control of 3D nanoparticle deposition remains a challenge. We use a combined experimental and numerical approach to achieve controlled 3D nanoparticle deposition by drying of colloidal suspension in two pillar-based thin micro-porous architectures. By the design of pillar layout, rectangular-spiral and circular-spiral deposition configurations are obtained globally. By varying the surface wettability, vertically symmetric and sloped nanoparticle depositions can be achieved locally. While the numerical modeling reveals the mechanisms of liquid internal flow, as well as the impact of local drying rate on nanoparticle transport, accumulation and final deposition, the experimental results of deposition configurations validate the controlling strategies. This combined experimental and numerical work provides a framework to achieve desired 3D nanoparticle deposition in thin micro-porous architectures, with a thorough understanding of the underlying mechanisms of two-phase fluid flows, phase change and mass transport. Graphical abstract: Image, graphical abstract