Disclosed herein is a sensor comprising a conduit； the conduit comprising an organic polymer； a working electrode； the working electrode being etched and decorated with a nanostructured material； a reference electrode； and a counter electrode； the working electrode, the reference electrode and the counter electrode being disposed in the conduit； the working electrode, the reference electrode and the counter electrode being separated from each other by an electrically insulating material； and wherein a cross-sectional area of the conduit that comprises a section of the working electrode, a section of the reference electrode and a section of the counter electrode is exposed to detect analytes.
