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Surface modification of cerasomes with AuNPs@poly(ionic liquid)s for an enhanced stereo biomimetic membrane electrochemical platform.
Bioelectrochemistry ( IF 4.8 ) Pub Date : 2019-11-20 , DOI: 10.1016/j.bioelechem.2019.107411
Daliang Liu 1 , Qiong Wu 2 , Shun Zou 2 , Feiyun Bao 2 , Jun-Ichi Kikuchi 3 , Xi-Ming Song 1
Affiliation  

A novel liposomal nanocomposite, Au@PIL-cerasome, with biocompatibility and conductivity was fabricated via the self-assembly of cerasomes and gold nanoparticles (AuNPs) stabilized by poly(ionic liquid)s (PILs). The surface charge, morphology and chemical composition of the nanocomposites were characterized by the zeta potential, UV-vis, TEM, SEM and EDS. The nanocomposites exhibited structural stability directly on the surface of solid electrodes, without fusion. Electrochemical impedance experiments demonstrated that the nanocomposites had an enhanced conductivity compared with unmodified cerasomes. Horseradish peroxidase (HRP), as a reporter, was immobilized on the nanocomposites without denaturation or inactivation. The direct electron transfer of HRP was achieved, and the HRP/Au@PIL-cerasome/GCE exhibited an amplified current and improved electrocatalytic activity. Activity towards H2O2 displayed a linear range over 10-70 μM and a detection limit of 3.3 μM. Activity towards NO2- displayed linear ranges over 1-5 mM and 5-1280 mM, and the limit of detection was 0.11 mM. In addition, the electrode was stable and reproducible, with 6% RSD. Such multi-component liposomal nanocomposites with an enhanced electrical performance pave a better way for building novel and straightforward 3D stereo biomimetic electrochemical platforms and even molecular communication systems to investigate information transduction between cells.

中文翻译:

用AuNPs @聚(离子液体)对陶瓷体进行表面修饰,以增强立体仿生膜电化学平台。

一种新型的脂质体纳米复合材料,Au @ PIL-陶瓷体,具有生物相容性和导电性,是通过陶瓷体和由聚离子液体(PILs)稳定的金纳米颗粒(AuNPs)的自组装而制备的。纳米复合材料的表面电荷,形态和化学组成通过ζ电势,UV-vis,TEM,SEM和EDS表征。纳米复合材料直接在固体电极的表面上显示出结构稳定性,而没有融合。电化学阻抗实验表明,与未修饰的陶瓷体相比,纳米复合材料具有增强的电导率。作为报告物,辣根过氧化物酶(HRP)被固定在纳米复合材料上,而没有变性或失活。实现了HRP的直接电子转移,HRP / Au @ PIL-cerasome / GCE的电流放大,电催化活性提高。对H2O2的活性显示出10-70μM的线性范围和3.3μM的检出限。对NO2的活性显示出1-5 mM和5-1280 mM的线性范围,检出限为0.11 mM。此外,电极稳定且可重现,RSD为6%。这种具有增强的电性能的多组分脂质体纳米复合材料为构建新颖而直接的3D立体仿生电化学平台甚至分子通信系统以研究细胞之间的信息传递铺平了更好的方法。检测下限为0.11 mM。此外,电极稳定且可重现,RSD为6%。这种具有增强的电性能的多组分脂质体纳米复合材料为构建新颖而直接的3D立体仿生电化学平台甚至分子通信系统以研究细胞之间的信息传递铺平了更好的方法。检测下限为0.11 mM。此外,电极稳定且可重现,RSD为6%。这种具有增强的电性能的多组分脂质体纳米复合材料为构建新颖而直接的3D立体仿生电化学平台甚至分子通信系统以研究细胞之间的信息传递铺平了更好的方法。
更新日期:2019-11-21
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