Immobilization of Prussian Blue nanoparticles onto thiol SAM modified Au electrodes for electroanalytical or biosensor applications.
Poly(vinylpyrrolidone) (PVP)-protected Prussian Blue (PB) nanoparticles were prepared by simply mixing FeCI3 and K4Fe(CN)6 with absence or presence of HCI or/and KCI in water solution. The obtained PB nanoparticles were immobilized onto thiol self-assembled monolayer (SAM) modified Au electrodes. L-cysteine (Cys) and 1,8-octanedithiol (ODT) were compared as a bridge between the gold surface and the PB nanoparticles. The results show that PB prepared from the initial solution with KCI gives preferred electrochemical response and that Cys/Au shows improved immobilization effect of PB than ODT/Au. The obtained PB/Cys/Au electrodes exhibit electrocatalytic activity toward H2O2 reduction and DL-homocysteine (HCys) oxidation. Glucose oxidase (GOX) was immobilized onto PB modified electrode to explore the potentials for the design of oxidase-based biosensors. It is possible to anchor PB nanoparticles and develop their application on electroanalysis and biosensing.
Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China.
Yuqing
Y
Miao
Jianrong
J
Chen
Xiaohua
X
Wu
Keming
K
Fang
Aiping
A
Jia
Jiwei
J
Liu
D015374:Biosensing Techniques; D002384:Catalysis; D003460:Crystallization; D003545:Cysteine / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D005295:Ferrocyanides / Q000737:chemistry*; D005949:Glucose Oxidase / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D011189:Potassium Chloride / Q000737:chemistry; D013438:Sulfhydryl Compounds / Q000737:chemistry
D005295:Ferrocyanides; D013438:Sulfhydryl Compounds; D011189:Potassium Chloride; D006046:Gold; D006861:Hydrogen Peroxide; D005949:Glucose Oxidase; D003545:Cysteine; C516316:1,8-octanedithiol; D010100:Oxygen; C000170:ferric ferrocyanide