Fabrication of Multidimensional Metal/Conducting Polymer Hybrid Nanoparticles and Their Chem/Bio Sensor Applications

Abstract

In recent decades, the synthesis of novel materials with improved properties and performance is a continually expanding frontier at the material science. In this regard, hybrid nanomaterials, composed of organic/inorganic hybrid, exhibit beneficial properties originated from each component and satisfy economical and environmental challenges of industry. Among diverse hybrid nanomaterials, metal-containing polymer hybrid nanomaterials are great interest in various applications including energy storage system, catalyst, and sensing device. Although various preparation methods have been devoted to the synthesis of metal/polymer hybrid nanomaterials, there is still lack of studies on the maximization surface area of nanomaterials through morphology control. This dissertation describes the fabrication of diverse multidimensional metal/conducting polymer hybrid nanoparticles with facile approaches and characterizes of as the prepared hybrid materials for sensor transducer application. Firstly, multidimensional FeOOH nanoneedle-decorated hybrid polypyrrole nanoparticles (PFFs) were fabricated using dual-nozzle electrospray and heat stirring steps for ultrasensitive nerve agent simulant ii (DMMP) chemical sensor. Multidimensional urchin-like polypyrrole (U_PPy) hybrid nanoparticles were fabricated through pyrrole monomer vapor deposition polymerization (VDP) of the PFFs and applied as hazardous gas (NH3/MeOH) chemical sensor. Aptamer-functionalized multidimensional carboxylated polypyrrole nanoparticles (A_M_CPPyNPs) were synthesized by using 3-carboxylated pyrrole monomer VPD on the PFFs surface and binding aptamer functionalization for sensing endocrine disruptor (bisphenol A) molecule. Secondly, multidimensional noble metal architecture decorated conducting polymer nanoparticles also suggest by using chemical reduction process. Multidimensional platinum particle decorated carboxylated polypyrrole nanoparticles (Pt_CPPys) were fabricated through chemical process using reducing agent (NaBH4) for detecting neurotransmitter molecule (dopamine). Multidimensional porous palladium architecture decorated carboxylated polypyrrole nanoparticles (M_PdCPPys) were also synthesized through alkylation and following reduction process to apply hydrogen gas detect sensing system. This dissertation provides the possibility of various types of metal/conducting polymer hybrid nanomaterials exhibited maximizing surface iii area through multidimensional architecture. The nanomaterials presented in this dissertation could be applied diverse sensing systems such as hazardous gas chemical sensor, non-enzyme field-effect-transistor (FET) sensor, and aptamer FET sensor. In addition, this dissertation suggests innovative methodological insight to simple preparation of various nanomaterials.