Fabrication and bacterial adhesion of metal dry electrode with surface microstructure arrays

为开发出高性能生物医用干式电极,提出了利用激光微铣-重铸加工方法,实现了表面具有微结构阵列特征的新型金属干式电极的制造成形。在分析电极表面微观形; 貌的基础上,研究了电极表面的润湿性能,并重点研究了扫描间距、扫描速度和扫描次数等加工参数对大肠杆菌粘附性能的影响规律。研究结果表明:在一定工艺参; 数条件下所加工出具有微结构阵列特征的电极的接触角可达150°以上,表现出超疏水的特性。在不同扫描间隙和扫描次数条件下加工出的电极对大肠杆菌的粘附; 性能具有较大影响,在选择0.1; mm扫描间隙时,电极表面粘附的大肠杆菌数量最少,适当增加扫描次数,也能够有效地减少电极表面大肠杆菌的粘结,从而发挥较好的抗菌效果。通过改变扫描速; 度加工出的电极则对大肠杆菌的粘附性能影响不大。To develop a high performance biomedical dry electrode, the laser; micromilling-recasting technology is used to fabricate the metal dry; electrode with surface micostructure arrays. Based on the analysis of; the micro morphology of the electrode surface, the wettability of the; electrode surface is discussed, and then the influence of laser; processing parameters such as scanning spacing, scanning speed and scan; times on the adhesion performance of Escherichia coli is further; investigated. The results show that the contact angle of metal dry; electrode with surface microstructure arrays fabricated with reasonable; laser processing parameter can reach more than 150° and show the; superhydrophobic characteristics. The adhesion performance of; escherichia coli of electrode is changed greatly with different scanning; spacing and scan times. When the 0.1 mm scanning spacing is selected,; the least amount of escherichia coli is found on the surface of; electrode. With the increasing scan times, the adhesion amount of; escherichia coli can be reduced. However, the scanned speed has little; effect on the adhesion performance of escherichia coli for metal dry; electrode.国家自然科学基金面上项目; 厦门市科技计划项目; 厦门市科技惠民项