National Central University

Cheng-Hsun Nien

Chuen-Horng Tsai

Wen-Bin Jian

Kun-Ying Shin

A light-driven rotor applied to a water surface includes a bottom plate, a thermally conductive sheet having a base portion covering on an upper surface of the bottom plate and a plurality of leads extended from the border of the base portion and bent downwardly from the edge of the bottom plate to contact the water surface, and a light-absorbing material attached to an upper surface of the thermally conductive sheet for absorbing the light irradiated thereon by a light source and providing light energy required for heating the thermally conductive sheet so that the heat generated by the thermally conductive sheet is conducted to the water surface via the leads to form a gradient change in surface tension, providing a resultant torque for driving the light-driven rotor to rotate. The materials selected for the three-layer structure design of the light-driven rotor are generally applicable, inexpensive and easy to obtain.

Light-driven rotor applied to a water surface

An electron microscope suitable for observing at least one sample is provided. The sample has at least one testing area, and a material of the sample on the testing area is semiconductive or conductive. The electron microscope includes a stage, an electron gun, and at least one probe. The stage is suitable for carrying the sample and the sample is not electrically grounded. The electron gun is suitable for generating an electron beam and accumulating charges on the sample. When the probe contacts with the testing area, the image contrast of the testing area will change. The current through the probe will also change upon contact. Methods have been provided based on these principles to determine 'when' and 'where' the probe starts to contact the sample surface inside an electron microscope.

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Taipei, Taiwan

Cheng-Hsun Nien