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On anomalous nanoparticle size evolution in glowing wire generator
Nano-Structures & Nano-Objects Pub Date : 2021-02-18 , DOI: 10.1016/j.nanoso.2021.100693
Elena Fomenko , Igor Altman , Igor E. Agranovski

This paper deals with nanoparticle generation by a glowing wire generator (GWG). The glowing chamber has been customized enabling using either single- or double-wire attached to the electrodes. The double-wire configuration was expected to significantly extend the operation window of the GWG. The undertaken measurements of the particle size distribution revealed, however, an anomalous behaviour of the particle size evolution depending on the applied voltage. At low voltages (<1.1V), the double-wire configuration allows for a substantial particle enlargement (up to two times) as compared to the single-wire configuration, which looks promising for the development of industrial aerosol generators. However, when the voltage exceeded the above value, the opposite behaviour was detected, i.e., some decrease in the particle size for the double-wire configuration was observed. This anomalous behaviour was attributed to interplay between nucleation and coagulation in the system. The corresponding mechanisms are discussed in this paper.



中文翻译:

发光丝发生器中纳米粒子尺寸的异常演化

本文介绍了通过灼热丝发生器(GWG)产生纳米颗粒的方法。发光室经过定制,可以使用连接到电极的单线或双线。预期双线配置将大大扩展GWG的操作范围。然而,对粒度分布进行的测量显示,取决于所施加的电压,粒度演变的异常行为。在低电压(<1.1V)下,与单线配置相比,双线配置可实现较大的颗粒增大(最多两倍),这对于工业气雾发生器的发展似乎很有希望。但是,当电压超过上述值时,检测到相反的行为,即 观察到双线构型的粒度有所降低。该异常行为归因于系统中成核与凝结之间的相互作用。本文讨论了相应的机制。

更新日期:2021-02-18
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