Self-Assembly Synthesis of Silver Nanowires/Graphene Nanocomposite and Its Effects on the Performance of Electrically Conductive Adhesive

Abstract

Among recent advances in electronic packaging technologies, electrically conductive adhesives (ECAs) attract most researchers’ attention, as they are environment-friendly and simple to apply. ECAs also have a lower operating temperature and volume resistivity compared with conventional electronic conductive adhesives. In ECAs, the conducting fillers play a significant role in improving conductivity and strength. In this work, as filler additives, the silver nanowires/graphene nanocomposites (AgNWs-GNs) were successfully fabricated via a facile self-assembly method. The characteristics of the as-prepared nanocomposites were evaluated by FTIR (Fourier Transform infrared spectroscopy), XRD (X-ray Diffraction), XPS (X-ray photoelectron spectroscopy), TEM (Transmission electron microscope) and Raman tests, demonstrating a successful synthesis process. Different amounts of AgNWs-GNs were used as additives in micron flake silver filler, and the effects of AgNWs-GNs on the properties of ECAs were studied. The results suggested that the as-synthesized composites can significantly improve the electrical conductivity and shear strength of ECAs. With 0.8% AgNWs/GNs (AgNWs to GO (Graphite oxide) mass ratio is 4:1), the ECAs have the lowest volume resistivity of 9.31 × 10−5 Ω·cm (95.4% lower than the blank sample without fillers), while with 0.6% AgNWs/GNs (AgNWs to GO mass ratio is 6:1), the ECAs reach the highest shear strength of 14.3 MPa (68.2% higher than the blank sample).

Silver Nanowires Deposited on Cellulose Nanofibers/Graphene Oxide Hybrid Membranes as Sandwich-Structured Films for Optoelectronic and SERS Applications

“…The enhanced oxygenfree peak may be attributed to the C−C bonds in the PVP layer along with the AgNWs. 20,59,63 Moreover, Figure 4e shows the Ag 3d XPS spectra of the b-AgNWs/CNF/GO film (red curve b) and the sandwich-structured AgNWs-CNF/GO-AgNWs film (blue curve c). The sharp peaks are derived from the 3d 5/2 and 3d 3/2 spin−orbit coupling with splitting binding energy of 6.0 eV, corresponding to zerovalent metallic AgNWs.…”

Different Synthesis Routes of Graphene-Based Metal Nanocomposites

“…The grown material can serve as the effective catalyst to activate peroxymonosulfate in the advanced oxidation process. Xu et al 83 prepared self assembled Ag nanowires-graphene nanocomposites for use in electrically conductive adhesives to improve its electrical conductivity and mechanical properties. Zhang et al 84 78 Na Li et al, "Battery Performance and Photocatalytic Activity of Mesoporous Anatase prepared rGO-encapsulated Cu nanoparticles employing electrostatic self assembly procedure which revealed exceptional electrocatalytic activity towards glucose oxidation along with a wide detection range, low detection limit and high sensitivity.…”

“…The grown material can serve as the effective catalyst to activate peroxymonosulfate in the advanced oxidation process. Xu et al83 prepared self assembled Ag nanowires-graphene nanocomposites for use in electrically conductive adhesives to improve its electrical conductivity and mechanical properties. Zhang et al84…”

A Novel Preparation Method of Electrically Conductive Adhesives by Powder Spraying Process

“…Ji et al [58] developed an ECA with a low Ag content based on the ternary hybrid of Ag microflakes, Ag nanospheres, and nanowires. Xu et al fabricated a silver nanowire/graphene nanocomposite ECA via a self-assembly method [59]. In summary, much progress has been achieved regarding electrically conductive fillers in ECAs.…”