» Articles » PMID: 20491433

Double Covalent Coupling Method for the Fabrication of Highly Sensitive and Reusable Electrogenerated Chemiluminescence Sensors

Overview
Journal Anal Chem
Specialty Chemistry
Date 2010 May 25
PMID 20491433
Citations 10
Authors
Affiliations
Soon will be listed here.
Abstract

A double covalent coupling method for the fabrication of a highly sensitive and reusable electrogenerated chemiluminescence (ECL) chemical sensor for the detection of tertiary amines and ECL aptamer-based (ECL-AB) biosensor for the detection of cocaine is reported. The ECL sensors were constructed by covalent coupling of amino-containing Ru(bpy)(3)(2+) derivatives (Ru1, Ru(bpy)(3)(2+) = tris(2,2'-bipyridyl)ruthenium(II)) or cocaine aptamer-Ru1 to the surface of a paraffin-impregnated graphite electrode that had been covalently modified with a monolayer of 4-aminobenzene sulfonic acid via electrochemical oxidations. ECL performance of the newly developed chemical sensors was evaluated using tri-n-propylamine (TPrA) and metoclopramide (MCP) as model analytes. The sensors exhibited excellent sensitivity, stability, and reproducibility with a detection limit of 30 nM for TPrA and 2.0 nM for MCP, and relative standard deviations (RSDs) of 2.1% over 90 cyclic potential cycles (0 to 1.50 V vs Ag/AgCl) and 2.6% over 45 cycles (0.60 to +1.30 V vs Ag/AgCl) at 400 mV/s for 50 nM TPrA and 200 nM MCP, respectively. For the ECL-AB biosensor, it showed an extremely low detection limit of 10 pM for cocaine, and offered a good selectivity toward cocaine, heroin, and caffeine. This detection limit was about 4-6 orders of magnitude lower than that reported on the basis of alternating current (AC) voltammetry and optical aptamer-based cocaine biosensors. Additionally, the ECL-AB biosensor was highly reusable (RSD = 2.8%, n = 7) and possessed long-term storage stability (96.8% initial ECL recovery over 21 days storage). A binding constant of 4.6 +/- 0.3 x 10(9) M(-1) between cocaine and its aptamer was estimated using an ECL based Langmuir isotherm approach. Wide ranging applications of the presently reported strategy in fabricating various chemical sensors or biosensors are expected.

Citing Articles

Optical Image Sensors for Smart Analytical Chemiluminescence Biosensors.

Abbasi R, Hu X, Zhang A, Dummer I, Wachsmann-Hogiu S Bioengineering (Basel). 2024; 11(9).

PMID: 39329654 PMC: 11428294. DOI: 10.3390/bioengineering11090912.


Electrochemiluminescence Systems for the Detection of Biomarkers: Strategical and Technological Advances.

Yoo S, Jeon Y, Heo S Biosensors (Basel). 2022; 12(9).

PMID: 36140123 PMC: 9496345. DOI: 10.3390/bios12090738.


Cocaine Detection by a Laser-Induced Immunofluorometric Biosensor.

Paul M, Tannenberg R, Tscheuschner G, Ponader M, Weller M Biosensors (Basel). 2021; 11(9).

PMID: 34562903 PMC: 8466613. DOI: 10.3390/bios11090313.


A Bottom-Up Approach for Developing Aptasensors for Abused Drugs: Biosensors in Forensics.

Celikbas E, Balaban S, Evran S, Coskunol H, Timur S Biosensors (Basel). 2019; 9(4).

PMID: 31581533 PMC: 6955935. DOI: 10.3390/bios9040118.


Nucleic acid-based ratiometric electrochemiluminescent, electrochemical and photoelectrochemical biosensors: a review.

Wang Z, Yu R, Zeng H, Wang X, Luo S, Li W Mikrochim Acta. 2019; 186(7):405.

PMID: 31183569 DOI: 10.1007/s00604-019-3514-6.