Study on high-speed size-selection technique for unstable nanoparticles using a novel tandem Differential Mobility Analyzer System

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K13308
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials engineering
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: ORII TAKAAKI 国立研究開発法人理化学研究所, イノベーション推進センター, 上級研究員 (60321741)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ナノ粒子 / サイズ選別 / 電気移動度分析器 / 蒸発速度 / ケルビン効果 / 表面張力

Outline of Final Research Achievements

It is known that nanoparticles become unstable due to the Kelvin effect as the size decreases. Unstable nanoparticles can shrink only by the operation of sorting the size. We studied how much the nanoparticle becomes smaller at the evaporation rate by size sorting by the differential mobility analyzer (DMA). For the purpose, we developed a novel double-layer DMA and a tandem DMA system that can measure the evaporation rate occurring in less than 1 second. Both devices demonstrated satisfactory performance and made it possible to measure the fast evaporation rate of fatty alcohol nanoparticles.

Free Research Field

ナノ材料