Abstract
As silver nanowires (Ag NWs) are usually manufactured by chemical synthesis, a patterning process is needed to use them as functional devices. Pulsed laser ablation is a promising Ag NW patterning process because it is a simple and inexpensive procedure. However, this process has a disadvantage in that target materials are wasted owing to the subtractive nature of the process involving the removal of unnecessary materials, and large quantities of raw materials are required. In this study, we report a minimum-waste laser patterning process utilizing silver nanoparticle (Ag NP) debris obtained through laser ablation of Ag NWs in liquid media. Since the generated Ag NPs can be used for several applications, wastage of Ag NWs, which is inevitable in conventional laser patterning processes, is dramatically reduced. In addition, electrophoretic deposition of the recycled Ag NPs onto non-ablated Ag NWs allows easy fabrication of junction-enhanced Ag NWs from the deposited Ag NPs. The unique advantage of this method lies in using recycled Ag NPs as building materials, eliminating the additional cost of junction welding Ag NWs. These fabricated Ag NW substrates could be utilized as transparent heaters and stretchable TCEs, thereby validating the effectiveness of the proposed process.
Highlights
As silver nanowires (Ag NWs) are usually manufactured by chemical synthesis, a patterning process is needed to use them as functional devices
Silver nanowire (Ag NW) percolation networks have attracted considerable attention as flexible and stretchable transparent conductive electrode (TCE) materials because they have high electrical conductivity and higher flexibility than indium tin oxide (ITO)[1,2,3]. These advantages have led to the development of various Ag NWbased optoelectronic devices, such as touch screen sensors[4,5], transparent heaters[6,7], skin sensors[8,9,10], organic light-emitting diodes (OLEDs)[11,12], and solar cells[13,14]
Local thermal insulation from patterned Ag NW cloth is reported by Hus et al.[9], and Won et al discussed the improved mechanical properties of electronic skin sensors obtained from a Kirigami-engineered pattern of Ag N Ws10
Summary
As silver nanowires (Ag NWs) are usually manufactured by chemical synthesis, a patterning process is needed to use them as functional devices. Through PLAL and EPD, a patterned substrate of Ag NWs decorated with Ag NPs was formed and used as a transparent heater and stretchable TCE, confirming that the process is suitable for practical applications.
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