Nanotechnology applications and the harmful effects of nanoparticles dispersed in atmospheric air are currently under discussion. In this case, we can cite applications in different areas such as: filtration, health effects studies, exposure chamber studies; engine exhaust research and measuring indoor air quality. Considering the variety of products made of nanoparticles available on the market, there is a need to produce and characterize a monodisperse flow. The objective of this study was to generate a monodisperse nano aerosol using a nano-differential mobility analyzer (Nano-DMA) and to estimate empirical models to describe the monodisperse nanoparticle distribution. For this purpose, a theoretical balance based on Wiedensohler’s equilibrium charge distribution used to predict values for the aerosol input and output as a function of particle diameter is proposed. In order to correct the obtained profiles, an inverse problem is proposed and solved by using the Differential Evolution (ED) algorithm and empirical models. The experimental results showed that the Nano-DMA reached the goals proposed. From the numerical point of view, the obtained results demonstrated the efficiency of the proposed methodology to estimate the monodisperse nanoparticle concentration.

目前正在讨论纳米技术的应用以及分散在大气中的纳米颗粒的有害影响。在这种情况下，我们可以引用不同领域的应用程序，例如：过滤，健康影响研究，暴露室研究；以及 发动机排气研究和测量室内空气质量。考虑到市场上可用的由纳米颗粒制成的产品的多样性，需要生产和表征单分散流。这项研究的目的是使用纳米差分迁移率分析仪（Nano-DMA）生成单分散的纳米气雾剂，并估计描述单分散的纳米颗粒分布的经验模型。以此目的，提出了基于Wiedensohler平衡电荷分布的理论平衡，该平衡用于预测气溶胶输入和输出的值与粒径的关系。为了校正所获得的轮廓，提出了一个反问题，并通过使用差分进化算法和经验模型来解决。实验结果表明，纳米DMA达到了建议的目标。从数值的角度来看，获得的结果证明了所提出的方法估计单分散纳米颗粒浓度的效率。