基于表面修饰多孔二氧化钛的pH敏感膜  

pH Sensitive Film Based on Surface Modified Porous Titanium Dioxide

作　　者：施肖锋 侯晓雅 刘雷 张婕 Shi Xiaofeng;Hou Xiaoya;Liu Lei;Zhang Jie(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;China Modernization Research Center,Chinese Academy of Sciences,Beijing 100080,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]中国科学院中国现代化研究中心,北京100080

出　　处：《微纳电子技术》2022年第6期522-528,共7页Micronanoelectronic Technology

摘　　要：柔性、小型化pH检测在医药、工业、食品和环保等领域有着良好的应用前景。研究了基于表面修饰多孔二氧化钛的延伸场效应晶体管的pH敏感性。通过硅烷偶联剂及其后处理,对二氧化钛表面进行修饰,得到pH敏感官能团。通过旋涂法将敏感材料旋涂到基底上,并采用煅烧模板法制备多孔二氧化钛。研究结果表明多孔二氧化钛具有良好的稳定性和较宽的pH响应范围(pH=2~12)。相对于表面不处理的二氧化钛,表面修饰氨基和羧基后的二氧化钛pH敏感性分别提升了34.21%和51.41%,从而打破了传统pH检测生产成本高和难以大面积生产等缺点,在与柔性可穿戴电子电路集成和食品包装智能检测等多个新兴领域有着很好的应用前景。Flexible and miniaturized pH detection has a good application prospect in the fields of medicine,industry,food and environmental protection.The pH sensitivity of extended field effect transistor based on surface modified porous titanium dioxide was studied.The surface of titanium dioxide was modified by silane coupling agent and then pH sensitive functional groups were obtained.The sensitive materials were rotationally coated on the substrate by spin coating method,and porous titanium dioxide was prepared by calcination template method.The results show that porous titanium dioxide has good stability and wide pH response range(pH=2-12).Compared with that without surface treatment,the pH sensitivities of titanium dioxide modified with amino and carboxyl groups are increased by 34.21% and 51.41%,respectively.It overcomes the disadvantages of the traditional pH detection,such as high production cost and difficult for large-area production.It has a good application prospect in many emerging fields such as flexible wearable electronic circuit integration and intelligent detection of food packaging and so on.

关 键 词：多孔二氧化钛 敏感膜 柔性材料 表面修饰 PH检测 

分 类 号：TB381[一般工业技术—材料科学与工程]