Hwang Chahwan, Heo Jae Sang, Kim Kyung-Tae, Kang Yeo Kyung, Choi Byungdoo, Kim Yong-Hoon, Facchetti Antonio, Park Sung Kyu, Kim Myung-Gil
Department of Chemistry, Chung-Ang University Seoul 06980 Korea
School of Electrical and Electronics Engineering, Chung-Ang University Seoul 06980 Korea
RSC Adv. 2019 Jan 4;9(2):730-737. doi: 10.1039/c8ra08173e. eCollection 2019 Jan 2.
Deep ultraviolet (DUV)-treatment is an efficient method for the removal of high-energy-barrier polymeric or aliphatic organic ligands from nanomaterials. Regardless of morphology and material, the treatment can be used for nanoparticles, nanowires, and even nanosheets. The high-energy photon irradiation from low-pressure mercury lamps or radio frequency (RF) discharge excimer lamps could enhance the electrical conductivity of various nanomaterial matrixes, such as Ag nanoparticles, BiSe nanosheets, and Ag nanowires, with the aliphatic alkyl chained ligand (oleylamine; OAm) and polymeric ligand (polyvinyl pyrrolidone; PVP) as surfactants. In particular, Ag nanoparticles (AgNPs) that are DUV-treated with polyvinyl pyrrolidone (PVP) for 90 min (50-60 °C) exhibited a sheet resistance of 0.54 Ω □, while thermal-treated AgNP with PVP had a sheet resistance of 7.5 kΩ □ at 60 °C. The simple photochemical treatment on various dimensionality nanomaterials will be an efficient sintering method for flexible devices and wearable devices with solution-processed nanomaterials.
深紫外（DUV）处理是一种从纳米材料中去除高能垒聚合物或脂肪族有机配体的有效方法。无论形态和材料如何，该处理方法可用于纳米颗粒、纳米线甚至纳米片。来自低压汞灯或射频（RF）放电准分子灯的高能光子辐照可以提高各种纳米材料基体的电导率，如以脂肪族烷基链配体（油胺；OAm）和聚合物配体（聚乙烯吡咯烷酮；PVP）作为表面活性剂的银纳米颗粒、BiSe纳米片和银纳米线。特别是，用聚乙烯吡咯烷酮（PVP）在50 - 60°C下对银纳米颗粒（AgNPs）进行90分钟的深紫外处理后，其方阻为0.54Ω/□，而用PVP对AgNP进行热处理，在60°C时方阻为7.5kΩ/□。对各种维度的纳米材料进行简单的光化学处理将成为一种用于由溶液处理纳米材料制成的柔性器件和可穿戴器件的有效烧结方法。
