Fabrication of Anti-Counterfeiting Micro-fingerprints on Signatures Based on Ion Wind
Anti-counterfeiting is a hot topic on information protection since counterfeiting would bring serious negative impacts in almost every aspect in our daily life.In this article,we introduce a novel unclonable anti-counterfeiting manufacture method through generating unique polymer wrinkle micropatterns on signatures based on ion wind.Concretely speaking,initially a tamper proofing handwriting signature is drawn on ceramic sheet by graphite pencils.Next,we cover the liquid polymer over the ceramic sheet,and ion wind that generates by a high voltage source acts on this sheet.Under the action of ion wind,the liquid polymer spontaneously converges from non-writing areas to writing areas,which will randomly form wrinkles on the signature.Finally,an experimental test is conducted,and the results illustrate that the topographical code of manufactured signature has a high complexity and is hard to be replicated.In addition,the complexity of this topographical code can be adjusted by tuning wrinkling instability through the coating speed and the applied voltage between the two electrodes,and the scale of pits in polymeric micropatterns ranges from a few microns to hundreds of microns.
anti-counterfeit signature wrinkle randomness ion wind
Shangru Zhou Yuping Yan Jie Liu Huai Zheng Sheng Liu
School of Power and Mechanical Engineering,Wuhan University,Wuhan,430072,China School of Power and Mechanical Engineering,Wuhan University,Wuhan,430072,China;The Institute of Tech
国际会议
上海
英文
144-147
2018-08-08（万方平台首次上网日期，不代表论文的发表时间）