https://doi.org/10.4164/sptj.46.114

粉体工学会誌 2009 年 46 巻 2 号 p. 114-118

This article reviews recent research works to show that spray method is a reliable tool to transfer the liquid-phase nanoparticles with organic compound into the gas-phase for measurement and assembly. The colloidal droplets are heated in the gas-phase to remove organic compounds and to transform the material to a desired crystalline phase. Particles can be deposited in the form of a monolayer film on a substrate by electrostatic force, and the selective deposition of “plus/minus” charged nanoparticles on an electrified pattern can also be performed. Aerosol measurement after in-flight heating is capable of accurate measurement for the size distributions of colloidal nanoparticles, providing useful thermal analysis route for nanomaterials.

Keywords: Aerosol, Colloid, Droplet, Electrospray, Pattern

本論文では、有機化合物を含む液中ナノ粒子を計測および集積のために気相へ移送する信頼性の高い手法として、スプレー法（噴霧法）を示した最近の研究成果を概説する。コロイド液滴を気相中で加熱することにより有機化合物を除去し、目的の結晶相へと材料を構造変化させる。静電気力を利用することで基板上に単層膜の形態で粒子を沈着させることができ、帯電パターン上への正／負に帯電したナノ粒子の選択的沈着も実現できる。気中（in-flight）加熱後のエアロゾル計測は、コロイドナノ粒子の粒径分布の正確な測定を可能にし、ナノ材料における有用な熱分析手法を提供する。

キーワード: エアロゾル、コロイド、液滴、エレクトロスプレー、パターン

Prompt for image:

Macro scientific visualization showing a single liquid (colloidal) droplet evaporating into a cloud of dispersed nanoparticles, transitioning from fluid dynamics to airborne aerosols and then converting the nanoparticles suspended in the gas-phase into their assembly of nanoparticles on a surface. Dark neutral background, luminous cyan and amber particles, high contrast, cinematic lighting, no text or logos.