Source:Biosensors and Bioelectronics, Volume 97
Author(s): Santanu Patra, Ekta Roy, Retwik Parui, Rashmi Madhuri, Prashant K. Sharma
Shape specific nanoparticles are getting a tremendous research interests due to their change in property with the shape. As far our knowledge, the impact of change in the shape of nanoparticle used as platform during synthesis of molecularly imprinted polymers (MIPs) has not been reported or tried. Herein, we have studied the effect of shape of silver nanoparticles (AgNPs) on the performance of MIPs. For this, different shaped (spherical, hexagon and cube) AgNPs were prepared by green-synthesis approach, modified with vinyl group, embedded into the shell of magnetic carbon nanoparticles and used as one of the functional monomer during tramadol imprinted polymer synthesis. The resulting MIP@Ag/C@Fe3O4 was used for adsorption, removal and detection of tramadol, which is gaining importance due to their recent ban in several countries. The change in behaviour of resulting MIPs, with the change in shape of the incorporated nanoparticles was studied in terms of electrocatalytic activity, surface area, adsorption capacity, and removal efficiency. Among their different shaped colleagues cube shaped AgNPs win the MIP race and exhibited the best performance owing to the presence of more facets in comparison to the others. Furthermore, the cube shaped AgNPs based MIP (MIP@Cube-Ag/C@Fe3O4) was successfully applied for the detection of tramadol in human sera and pharmaceutical samples without any cross-reactivity. In addition to the advantages of low cost, high selectivity, sensitivity, good adsorption and removal properties, the resulting MIP format is biodegradable too i.e. the material will not create any environmental hazards after their use and could be very easily disposed off from the medium.
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