摘要
将杂环导电聚合物聚吡咯经电化学聚合精确沉积于神经修补元件的各个电极上,经扫描电子显微镜及原子力显微镜分析,该聚吡咯涂层具有高粗糙度的菜花状形貌,该形貌具有较大的表面积,可为神经修补元件与中枢神经组织提供紧密的接触,并可将原电极在1kHz处的阻抗值降低两个数量级。利用纳米硬度仪得到的载荷-位移曲线表明,聚吡咯涂层具有疏松的表面结构,在受到压力时,涂层渐被压实,涂层的平均模量为1.3GPa,介于修补元件材料与中枢神经组织之间,在力学模量上起到了良好的中间过渡层作用。
Heterocyclic conducting polymer polypyrrole was electrochemically deposited precisely onto the electrodes of neural prosthetic devices. SEM and AFM indicated that the morphology of the coating is a nodular surface with high roughness thus it can provide an intimate contact between the prosthetic device and the brain tissue. At 1 kHz, the lowest magnitude of the impedance of the coating can be two orders lower than that of the bare gold electrode. Nanoindentation characterization demonstrated that the coating has a porous surface morphology and can be densified in the progress. The average modulus of the coating is (1.3) GPa, which is between the modulus of the prosthetic device and that of the brain tissue.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第3期262-265,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50373019)
关键词
聚吡咯
神经修补元件
表面改性
力学模量
polypyrrole
neural prosthetic device
surface modification
mechanical property
