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Functional histidine/nickel hexacyanoferrate nanotube assembly for biosensor applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
9893 652 2007 10 PDF Available
Title
Functional histidine/nickel hexacyanoferrate nanotube assembly for biosensor applications
Abstract

By exploring the properties of histidine, functional histidine/nickel hexacyanoferrate nanotube assembly was prepared using nanopore alumina template via a sequential deposition strategy and demonstrated for improved biosensing. The vertically oriented nanotube assembly has a nanotube density ∼8×108 cm−2 and can be stably attached to the glassy carbon electrode surface. The nanotube assembly formed provides an ordered well-defined three-dimensional (3D) structure with good electron transfer efficiency and a large specific surface area with abundant electroactive sites. Gold nanoparticles were then absorbed onto nanotube surfaces through amino group provided by histidine, and were used for further absorption of glucose oxidase into the 3D matrix. The histidine and gold nanoparticles on the nanotube surface provide a favorable microenvironment to keep the bioactivity of the enzymes with a low apparent Michaelis–Menten constant (KMapp) of 2.15 mm, and the ordered orientation of the nanotube assembly facilitated enzyme–substrate contact. The biosensor was sensitive and selective toward glucose with a linear range covered from 2 μm to 20 mm of glucose. The biosensor was used to determine glucose concentration in real blood samples with satisfactory results.

Keywords
Biosensor; Electrochemistry; Enzyme; Gold nanoparticle; Metal hexacyanoferrate; Nanotube assembly
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Functional histidine/nickel hexacyanoferrate nanotube assembly for biosensor applications
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 28, Issue 23, August 2007, Pages 3408–3417
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us