The application of surface textures has been employed to improve the tribological performance of various mechanical components. Various techniques have been used for the application of surface textures such as micro-d...The application of surface textures has been employed to improve the tribological performance of various mechanical components. Various techniques have been used for the application of surface textures such as micro-dimple arrays, but the fabrication of such arrays on cylindrical inner surfaces remains a challenge. In this study, a dry-film photoresist is used as a mask during through-mask electrochemical micromachining to successfully prepare micro-dimple arrays with dimples 94 lm in diameter and 22.7 lm deep on cylindrical inner surfaces, with a machining time of 9 s and an applied voltage of 8 V. The versatility of this method is demonstrated, as are its potential low cost and high efficiency. It is also shown that for a fixed dimple depth, a smaller dimple diameter can be obtained using a combination of lower current density and longer machining time in a passivating sodium nitrate electrolyte.展开更多
加工一种基于感光干膜-铟锡氧化物DFP-ITO(Dry Film Photoresist-Indium Tin Oxide)电极的细胞阻抗生物传感器并实现细胞形态学和阻抗信息同时检测。35μm厚的感光干膜层压在ITO导电玻璃表面上作为绝缘层,通过照相制版技术在感光干膜绝...加工一种基于感光干膜-铟锡氧化物DFP-ITO(Dry Film Photoresist-Indium Tin Oxide)电极的细胞阻抗生物传感器并实现细胞形态学和阻抗信息同时检测。35μm厚的感光干膜层压在ITO导电玻璃表面上作为绝缘层,通过照相制版技术在感光干膜绝缘层上蚀刻不同直径圆孔;以DFP-ITO作为工作电极,通过夹具和测量小池与Ag/Ag Cl参比电极、Pt丝对电极相连构成三电极阻抗测量系统;考察了不同直径DFP-ITO工作电极阻抗谱特征;通过细胞粘附实验及细胞毒性实验考察了感光干膜细胞生物相容性;通过光学显微镜和阻抗谱技术分别对接种在DFP-ITO电极上人肺癌细胞株A549粘附、增殖过程中的形态学和阻抗信息进行检测和分析。研究结果发现不同直径DFP-ITO电极具有相似的阻抗特性;充分固化的感光干膜表面适宜A549细胞粘附且无明显的细胞毒性;基于DFP-ITO电极构建的细胞阻抗传感器能够通过光学显微镜获取A549细胞形态学数据,同时通过阻抗谱技术能够解析A549细胞粘附、增殖过程中的细胞质膜电容、细胞-细胞间隙电阻、细胞-ITO电极间隙电阻变化。本文发展了基于DEP-ITO电极的细胞阻抗传感器结构简单,可实现细胞形态学和阻抗信息的双通道获取,未来可用于细胞生理病理学行为和药物细胞毒性研究。展开更多
基金supported by the Joint Funds of the National Natural Science Foundation of China and Guangdong Province(No.U1134003)
文摘The application of surface textures has been employed to improve the tribological performance of various mechanical components. Various techniques have been used for the application of surface textures such as micro-dimple arrays, but the fabrication of such arrays on cylindrical inner surfaces remains a challenge. In this study, a dry-film photoresist is used as a mask during through-mask electrochemical micromachining to successfully prepare micro-dimple arrays with dimples 94 lm in diameter and 22.7 lm deep on cylindrical inner surfaces, with a machining time of 9 s and an applied voltage of 8 V. The versatility of this method is demonstrated, as are its potential low cost and high efficiency. It is also shown that for a fixed dimple depth, a smaller dimple diameter can be obtained using a combination of lower current density and longer machining time in a passivating sodium nitrate electrolyte.
文摘加工一种基于感光干膜-铟锡氧化物DFP-ITO(Dry Film Photoresist-Indium Tin Oxide)电极的细胞阻抗生物传感器并实现细胞形态学和阻抗信息同时检测。35μm厚的感光干膜层压在ITO导电玻璃表面上作为绝缘层,通过照相制版技术在感光干膜绝缘层上蚀刻不同直径圆孔;以DFP-ITO作为工作电极,通过夹具和测量小池与Ag/Ag Cl参比电极、Pt丝对电极相连构成三电极阻抗测量系统;考察了不同直径DFP-ITO工作电极阻抗谱特征;通过细胞粘附实验及细胞毒性实验考察了感光干膜细胞生物相容性;通过光学显微镜和阻抗谱技术分别对接种在DFP-ITO电极上人肺癌细胞株A549粘附、增殖过程中的形态学和阻抗信息进行检测和分析。研究结果发现不同直径DFP-ITO电极具有相似的阻抗特性;充分固化的感光干膜表面适宜A549细胞粘附且无明显的细胞毒性;基于DFP-ITO电极构建的细胞阻抗传感器能够通过光学显微镜获取A549细胞形态学数据,同时通过阻抗谱技术能够解析A549细胞粘附、增殖过程中的细胞质膜电容、细胞-细胞间隙电阻、细胞-ITO电极间隙电阻变化。本文发展了基于DEP-ITO电极的细胞阻抗传感器结构简单,可实现细胞形态学和阻抗信息的双通道获取,未来可用于细胞生理病理学行为和药物细胞毒性研究。
文摘感光干膜又称光致抗蚀干膜,是一种固态负性光刻胶,作为生产印制电路板(printed circuit board,PCB)的重要原材料之一,市场规模巨大。随着电子产品精密和微型化需求的日益增长,传统的PCB生产技术,图形转移技术无法满足生产需求;激光直接成像(laser direct imaging,LDI)技术具有高精度特点,被广泛应用于感光干膜生产中。从感光干膜的性能和特征、感光干膜行业的技术壁垒及感光感膜的发展现状和应用领域等方面综述了感光干膜相关技术的研究进展,为相关行业工作者提供理论参考。
