Electrocatalytic and magnetic properties of ultrathin nanostructured iron-melanin films on Au(111)

被引：11

作者：

Gonzalez Orive, Alejandro

Dip, Patricio

Gimeno, Yurima

Diaz, Pilar

Carro, Pilar

Hernandez Creus, Alberto

Benitez, Guillermo

Schilardi, Patricia L.

Andrini, Leandro

Requejo, Felix

Salvarezza, Roberto C.

机构：

[1] Univ Nacl La Plata, CONICET, Fac Ciencias Exactas, INIFTA,Inst Invest Fisicoquim Teor & Aplicadas, RA-1900 La Plata, Argentina

[2] Univ La Laguna, Fac Quim, Dept Quim Fis, San Cristobal la Laguna 38071, Tenerife, Spain

[3] Univ Chile, Fac Ciencias Fis & Matemat, Escuela Postgrado, Santiago 2777, Chile

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2007年 / 13卷 / 02期

关键词：

biosensors; catalysis; magnetic properties; melanins; nanostructures;

D O I：

10.1002/chem.200600492

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have prepared ultrathin, nanostructured melanin films on Au-(111) by means of electrochemical selfassembly. These films were characterized by using Auger electron spectroscopy, X-ray absorption near-edge structure spectroscopy, scanning tunneling microscopy, magnetic force microscopy, and electrochemical techniques. Two types of nanostructures are present in the film: melanin nanoparticles and Fe3O4 nanoparticles. The melanin nanoparticles contain Fe bonded to oxygen-containing phenolic groups in an octahedral configuration similar to that found in Fe2O3. The inorganic-organic composite exhibits magnetic properties and catalyzes the electroreduction of hydrogen peroxide in alkaline and neutral electrolyte solutions. The electrocatalytic activity depends on the Fe-bound melanin and appears to be similar to that found for Fe-porphyrins.

引用

页码：473 / 482

页数：10