Year: 2015
Type: article
Abstract: Supramolecular chemistry utilizes coordination bonds to assemble molecular building blocks into a variety of sophisticated constructs. However, traditional coordination assemblies are based on organic compounds that have limited ability to transport charge. Herein, we describe coordination assembly of anisotropic FeS2 pyrite nanoparticles (NPs) that can facilitate charge transport. Zn(2+) ions form supramolecular complexes with carboxylate end-groups on NP surface, leading to multiparticle sheets with liquid-crystal-like organization. Conductivity and Hall carrier mobility of the p-type layered semiconductor films with Zn(2+) coordination bridging exceed those known for coordination compounds, some by several orders of magnitude. The nanoscale porosity of the assembled sheets combined with fast hole transport leads to high electrocatalytic activity of the NP films. The coordination assembly of NPs embraces the versatility of several types of building blocks and opens a new design space for self-organized materials combining nanoscale and supramolecular structural motifs.
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Awards: Ceramic Quasicrystals, G1381087207, G146658024, Acquisition of a Field Emission Gun Analytical Electron Microscope for the University of Michigan Electron Microbeam Analysis Laboratory, G2330423142, Energy- and Cost- Efficient Manufacturing Employing Nanoparticle Self-Assembly with Continuous Crystallinity, G5417944882, CEMRI for Photonic and Multiscale Nanomaterials, G7741291485, Detection of Protein Misfolding Using Nanorod Assemblies
OpenAlex ID: W2097690485