文献类型：期刊文献

英文题名：Silver nanoparticle-functionalized polydopamine nanotubes for highly sensitive nanocomposite electrode sensors

作者：Gan, Lingfeng[1];Chen, Chao[1];Qin, Peng[1];Wang, Yibing[1];Wang, Ping[2]

机构：[1]East China Univ Sci & Technol, Biomed Nanotechnol Ctr, Sch Biotechnol, China State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Univ Minnesota, Dept Bioprod & Biosyst Engn, St Paul, MN 55108 USA

年份：2020

卷号：861

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;EI(收录号：20200808210838);WOS:【SCI-EXPANDED(收录号:WOS:000525892300023)】；

基金：This work was supported by the National Natural Science Foundation of China (21636003 and 21672065), the Natural Science Foundation of Shanghai (19ZR1412400) and the Fundamental Research Funds for the Central Universities (22221818014).

语种：英文

外文关键词：Polydopamine nanotubes; Hydrogen peroxide; Electrochemical; Silver nanoparticles; Non-enzyme sensor

摘要：Multi wall carbon nanotubes (MWCNTs) are used in construction of nanocomposite electrode for many sensors. However, the chemical stability of MWCNTs also implicated difficulties for surface modification and further functionalization. Polydopamine nanotubes (PDA-NTs) possess nitrogen-doped polycyclic aromatic hydrocarbons side-walls, which not only reassemble the structure and the electrochemical properties of carbon nanotubes, but also afford active surfaces for further functionalization. This work examines the fabrication of PDA-NTs with silver nanoparticles (AgNPs) for construction of nanocomposite electrodes for highly sensitive chemical analysis. The prepared PDA-NTs share the similar backbone structure like MWCNTs as analysis by Raman spectroscopy. Grown AgNPs significantly enhanced Raman peak intensity because of the surface enhancement ofRaman scattering ofAgNPs. In a testwith hydrogen peroxide, Ag@PDA-NTs modified electrode showed an LDR of 5-200 mu M and LOD of 0.68 mu M, almost ten time lower than reported PDA and AgNPsmodified electrode (LOD = 6.5 mu M). It also owns good reproducibility, long-termstability and interfering effect against GLU, UA and DA. AgNPs can also grow more easily on PDA-NTs than on MWCNTs at the same AgNO3 concentration and possess much better dispersivity at the same time. It appears that PDA supported nanofabrication is versatile and promising for development of high performance electrochemical sensors. (C) 2020 Published by Elsevier B.V.