Guannan Yang, Weiwei He, Wenzhe Wang, Xianhao Da, Shengtao Yu, Qian Xiong, Tianshuo Zhao, Guanghan Huang, Yu Zhang, Chengqiang Cui
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Aerosolized liquid phase reaction method: an approach for the continuous preparation of highly dispersed copper nanoparticles
An aerosolized liquid phase reaction method is proposed for the continuous preparation of highly dispersed copper nanoparticles. The copper precursor solution and reducing agent solution are mixed and aerosolized immediately into microdroplets, which prevents the synthesized copper nanoparticles from coming into contact and forming agglomerates. Compared to the traditional liquid phase synthesis of copper nanoparticles, this method reduces the average size of the nanoparticles from 309 to 210 nm and the maximum size of the agglomerates from ~ 10 to ~ 3 μm. As a result, the shear strength of the sintered joint made with the aerosol-produced nanoparticles is improved from 33 to 57 MPa, and the electrical resistance is reduced from 4.3 × 10–7 to 6.1 × 10–8 Ω·m. This method provides an effective approach to decrease agglomeration and improve the performance of metal nanoparticles for electronic packaging applications.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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