Toyota Physical and Chemical Research Institute, Aichi, Japan .
Toyota Central R&D Laboratory, Aichi, Japan .
Proc Jpn Acad Ser B Phys Biol Sci. 2007 Dec;83(9-10):320-5. doi: 10.2183/pjab/83.320.
We report the formation of water droplets by irradiating wet ambient air with deep UV light. The light sources were either a continuous low-pressure mercury lamp or pulsed ArF laser, which both emit light shorter than 200 nm. Water droplets were produced in reaction vessels under different temperature, relative humidity, and moisture-supply conditions. The particles grew as large as about 0.2 mm. The suggested mechanism is discussed with the photo-dissociations of oxygen and successively formed ozone, and further dark reactions giving hydrogen peroxide as a seeding nucleus. Observed concentrations of intermediates were well explained by simulating the proposed chemical reactions. A possible application to artificial rain is briefly described.
我们报告了通过用深紫外光辐照湿环境空气来形成液滴。光源为连续的低压汞灯或脉冲 ArF 激光，它们都发射短于 200nm 的光。在不同的温度、相对湿度和供湿条件下，在反应容器中生成了液滴。颗粒长大到约 0.2mm 大小。讨论了建议的机制，涉及氧气的光解和随后形成的臭氧，以及进一步的暗反应，生成过氧化氢作为成核中心。通过模拟建议的化学反应，很好地解释了观察到的中间产物浓度。简要描述了一种用于人工降雨的可能应用。
