ISHIZUKA Shinnosuke［Affiliation　April 2022-August 2023］

Starting year 2022

Nagoya University
Institute for Advanced Research / Institute for Space-Earth Environment Research
YLC Designated Assistant Professor

Research Areas：Environmental Science / Agriculture Science　Natural Science

Research fields

Atmospheric Chemistry
Astrochemistry
Physical Chemistry

Research Interests

Atmospheric Aerosol
Cosmic Dust
The Air-Water Interface
Nucleation & Growth

Professional Memberships

The Japan Society of Atmospheric Chemistry
The Japanese Association for Crystal Growth
Japan Geoscience Union

Main research topics

Nano-Micro particles play critical roles in the nature. Aerosols in the atmosphere are the key in the climate change and environmental pollution. Cosmic dust are vital components in astrophysical processes. However, little attention has been paid for specific chemistry of the tiny particles.

The smaller size causes increasing contributions from their surfaces, which is critical to thermodynamic properties and chemical reactivity of the tiny particles. Confinement in the small volume of aqueous droplet facilitates access to highly supersaturated states. In addition, particles smaller than 10 nm shows different material properties from the bulk. These tiny characters would be the key to elucidate formation of atmospheric aerosol and cosmic dust from gaseous molecules (0.1 nm), and growth and degradation driven by interactions with the environments including the surrounding gas species and light irradiation.

My goal is to elucidate (1) nucleation and growth from vapor, and (2) phase transition of the tiny particles and molecular processes at the interfaces, and (3) to evaluate their roles in the atmosphere/Universe quantitatively. I reveal fates of atmospheric aerosol and cosmic dust by using and developing novel experimental techniques including in-situ IR spectroscopy, surface-sensitive mass spectrometry, in-situ transmission electron microscopy, and optical tweezers.

 

Representative papers

Ishizuka, S., Kimura, Y., Sakon, I., Kimura, H., Yamazaki, T., Takeuchi, S. and Inatomi, Y. Sounding-Rocket Microgravity Experiments on Alumina Dust. Nature Communications, 2018, 9(1), 3820.

Ishizuka, S., Matsugi, A., Hama, T. and Enami, S. Interfacial Water Mediates Oligomerization Pathways of Monoterpene Carbocations. The Journal of Physical Chemistry Letters, 2020, 11 (1), 67-74.

Research URL

researchmap　https://researchmap.jp/Shinnosuke_Ishizuka

Google Scholar　https://scholar.google.co.jp/citations?user=L34LlUIAAAAJ&hl=ja

Global issues to be solved through this project

Aerosol hygroscopicity altered by nanoscale inhomogeneity

Nano to micrometer-sized aerosols ubiquitous in Earth’s atmosphere impact the climate system by light absorption and scattering and by promoting cloud droplet formation. PM2.5 (aerosols < 2.5 mm in diameter) is one of the controlling factors of 4 million people death per a year due to the environmental pollution. Aerosols-Water interaction is the key to elucidate formation, growth, and degradation of the particulate matter and to evaluate their roles in the atmosphere. Here, we study inhomogeneity in inorganic-organic mixed aerosols in nanoscale and its influences on their hygroscopicity. Single particle measurement is challenged by using optical-tweezers and in-situ transmission electron microscopy.

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