Noble metal particles based hydrogen peroxide and glucose sensor.

• Main Author: Sim, Vinnie Kwang Kiat.
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Final Year Project
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Bioengineering
• Online Access: http://hdl.handle.net/10356/52848
• Institution: Nanyang Technological University

Due to the unique properties of noble metal nanoparticles, they have attracted huge attention in many applications which includes biosensors, nanomedicine, catalysis and nanodevices. There are various classes of nanoparticles such as spheres, rods, cubes, cages, octahedrons, and branched multi-pods. Recently, two new metal nanostructures such as concave nanoparticles and suprastructures have attracted much more attractions because of their distinctive properties and potential applications. Concave particles, as a result of their high-index, bring about higher chemical activities and selectivity. Suprastructure, which is an assembly of many individual nanoparticles, exhibit unique collective properties that are different to those of both the individual NCs and bulk materials, are of much scientific and technological interest. In our present study, a new class of concave particles, palladium tetrahedral, was prepared and utilized as a hydrogen peroxide sensor. In addition to that, copper “Rice-shaped” particles, a form of suprastructure, was prepared and being used as a glucose sensor. Our investigations have shown that the palladium tetrahedral has the ability to detect hydrogen peroxide at low concentrations of 50.0μM with a linear range of up to 3.4mM. As for the copper “Rice-shaped” particles, it could detect glucose at a concentration of 10μM with a linear range up to 3.15mM. This work has shown advantages and potential for further analytical purpose and applications.