Abstract

This paper reports the size classification of nanoparticles as well as electrical tuning techniques for the cut-off diameter and collection efficiency. Classifying particles ＜ 100 ㎚ in diameter is quite a technical challenge using a virtual impactor with the cut-off diameter being determined geometrically. However, the proposed virtual impactor can classify particles ＜ 1 00 ㎚ and tune the cut-off diameter by electrically accelerating the particles. The cut-off diameter of the proposed device was tuned from 15 to 50 ㎚.

• Keywords: Size Classification(입경별 분류),Nanometer-sized Airborne Particle(대기 중 나노 입자),Cut-off Diameter(분류 입경),Collection Efficiency(포집 효율),Virtual Impactor(가상 임팩터)