Molecularly imprinted polymer decorated nanoporous gold for highly selective and sensitive electrochemical sensors.

Abstract:

:Electrochemical nanosensors based on nanoporous gold leaf (NPGL) and molecularly imprinted polymer (MIP) are developed for pharmaceutical analysis by using metronidazole (MNZ) as a model analyte. NPGL, serving as the loading platform for MIP immobilization, possesses large accessible surface area with superb electric conductivity, while electrochemically synthesized MIP thin layer affords selectivity for specific recognition of MNZ molecules. For MNZ determination, the hybrid electrode shows two dynamic linear range of 5 × 10(-11) to 1 × 10(-9) mol L(-1) and 1 × 10(-9) to 1.4 × 10(-6) mol L(-1) with a remarkably low detection limit of 1.8 × 10(-11) mol L(-1) (S/N = 3). In addition, the sensor exhibits high binding affinity and selectivity towards MNZ with excellent reproducibility and stability. Finally, the reliability of MIP-NPGL for MNZ detection is proved in real fish tissue samples, demonstrating the potential for the proposed electrochemical sensors in monitoring drug and biological samples.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Li Y,Liu Y,Liu J,Liu J,Tang H,Cao C,Zhao D,Ding Y

doi

10.1038/srep07699

subject

Has Abstract

pub_date

2015-01-09 00:00:00

pages

7699

issn

2045-2322

pii

srep07699

journal_volume

5

pub_type

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