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Micro/Nano- Approaches for Continuous Glucose Monitoring
发布日期:2017-03-27   浏览次数:

题目:Micro/Nano- Approaches for Continuous Glucose Monitoring

主讲:朱志刚

时间:3月30日15:30

地点:材料楼304

主办:材料学院

主讲简介:朱志刚,上海第二工业大学环境与材料工程学院院长、研究员,校金桥特聘教授、上海市高校特聘教授“东方学者”、上海市曙光学者。研究专长:功能材料。在NT、SAB、JMM等重要刊物上发表论文40余篇(H-index=12),其中被SCI收录35篇(JCR一区5篇,ESI高被引论文1篇),论文被引用470余次。积极参加各种国内外学术会议,其中特邀报告5次,分会场主席2次,组委会/顾委会委员3次。

主讲内容:This talk is focused on implantable glucose biosensor, including Pt coil-type implantable sensor, carbon nanotube (CNT) fiber based enzymatic sensor and CNT/Ni nanocomposite based non-enzymatic sensor. To improve the life-time of glucose sensor implanted underneath the skin, a new type of Pt coil electrode was introduced, which is able to immobilize much more GOD than traditional needle type electrode. The selection of semi-permeable membrane is critical for the sensor linearity. The sensors could be survived for 4 weeks during in-vivo test, and histology revealed that the fibrous capsules surrounding hydrogel-coated sensors were thinner than before. A novel brush-like electrode based on carbon nanotube (CNT) fiber has been designed for electrochemical biosensor applications and its efficacy as an enzymatic glucose biosensor was demonstrated. The electrode end-tip of the CNT fiber was freeze-fractured to obtain a unique brush-like nano-structure resembling a scale-down electrical ‘flex’. The sensitivities, linear detection range and linearity for detecting glucose for the miniature CNT fiber electrode were better than that reported for Pt-Ir coil electrode. In addition, gold coating of the CNT fiber electrode resulted in extending the glucose detection limit to 25 µM. A highly sensitive nonenzymatic amperometric glucose sensor was fabricated by using Ni nanoparticles homogeneous dispersed within and on the top of a vertically aligned CNT forest. The CNT/Ni nanocomposite sensor exhibited a great enhancement of anodic peak current after adding 5mM glucose in alkaline solution. The sensor can also be applied to the quantification of glucose content with a linear range covering from 5 µM to 7 mM, a high sensitivity of 1433 µA mM-1 cm-2, and a low detection limit of 2 µM.

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