The Ar-cluster ion source at energy in order of keV was installed with the Q-ToF (Quadrupole Time-of-Flight) premier at the Quantum Science and Engineering Center, Kyoto University. The main component of Q-ToF premier consists of the travelling-wave ion guide, mass filter quadrupole lens, travelling-wave collision cell, and time of flight analyzer. The...
The flow of suspended particle in various fluid viscosities was investigated in this study. The particles in viscous fluid flow are affected by transverse inertial force and shear lift force, so their equilibrium position will be located where these forces balance. The straight 200x100 µm2 cross section, 5 cm long microfluidic device used in this study was fabricated using printed circuit...
Light as electromagnetic wave when travelling through a liquid solution, it could perturb and interact with molecules in that solution. DNA absorbs light specifically at 260 nm. The absorbance is related to DNA concentration through Beer-Lambert law of absorption. This relationship is a common basis of DNA quantification in spectrophotometers. A bulky deuterium lamp or halogen lamp is...
In the process of measuring flatness, there are many parameters that affect accuracy of the measurement. This paper investigated temporal change in flatness of flat surface due to optical mounting and gravity. Flatness and topography of flat surface diameter range from 60 mm to 300 mm were recorded and evaluated by using Fizeau interferometer. Differences in mounting and geometry of the...
The fluid mechanics of single-phase flow with relatively viscosity in straight microfluidic channel was investigated experimentally. The adopted technique is based on particle migration phenomenon occurring when fluid with 10 micron diameter particles flow in straight 200 micron width 100 micron height microfluidic channel. The method is applied to find equilibrium position of the particles in...
