报告题目：Magnetic Field Effect on Water Wetting
报告人：Eric BEAUGNON 教授 (法国格勒诺布尔大学/国家强磁场实验室（CNRS-LNCMI）)
Magnetic fields effects on water have been widely studied. In one of these studies , it has been demonstrated that under air or oxygen, a 6T field influences the contact angle of pure water with platinum, and that this effect depends on exposure time and is slowly relaxed after removal of the field.
We present new results of this effect, not only using pure water moved up and down in the magnetic field, but also using waters with different electrical conductivities, being moved or not in the magnetic field, with different magnetic field values and on different substrates, using copper and gold.
A flask of water is either maintained static in the maximum field of a superconducting or resistive magnet, or moved up and down from the maximum field to almost zero field, 20 times per minute. 12 L samples are deposited on a clean metallic substrate every 20 minutes and the contact angle is measured out of the field with a macro-camera using ImageJ free software. The field is shut down after 150 min,and some samples are then still measured. In all experiments under magnetic field, a common behavior is observed: after switching on the field, the contact angle gradually decreases with time until reaching a saturation value. After switching off the field, the contact angle slowly recovers its initial value.
Eric Beaugnon, 法国格勒诺布尔-阿尔卑斯大学教授，法国国家强磁场实验中心研究员，曾担任约瑟夫傅里叶大学副校长，法国国家科学研究中心先进材料应用研究研究所所长。长期以来一直从事强磁场下材料的相变研究与应用工作，是国际磁科学研究领域的著名专家，目前是国际磁科学会议组织委员会(International Organizing Committee of ICMS)主席。