2016 IEEE 16TH INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO) 214-217 2016年 [査読有り]
We present a method of determining the mass of a single picogram particle by observing its Brownian motion near the bottom of a droplet of water. The motion of the particle caused by thermal fluctuation is restricted within a narrow region because...
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 84(8) 2015年8月 [査読有り]
The Brownian motion of a single small particle trapped on the surface of a suspended liquid droplet is studied and used to measure its mass. On the basis of the Ornstein-Uhlenbeck theory, the time dependence of the distance between the particle an...
e-Journal of Surface Science and Nanotechnology 13 167-173 2015年 [査読有り]
We demonstrate a method to clean and probe a graphene layer on copper by using cluster ions consisting of thousands of argon (Ar) atoms. Ar cluster ions colliding with a solid at kinetic energies below ∼5 eV/atom dissociate into smaller cluster io...