Colloidally-synthesized heterostructured nanomaterials for smaller, stronger, more efficient computing components
Abstract
Title: Colloidally-synthesized heterostructured nanomaterials for smaller, stronger, more efficient computing componentsObjective:This project is targeted at creating and optimizing new materials at the ultimate limit of nanoscale properties. This regime, where particles are composed of tens to tens of thousands of atoms (~1-10 nm), manifests a transition from fully bulk-like properties to fully molecular properties. At this frontier of magnetic and electronic computing materials we find a significant challengeas well as an opportunity to observe new physics and chemistry. It also represents a difficult sizescalefor top-down approaches.Approach:PI sees opportunities for a new generation of bottom-up materials created using standard inorganic chemistry techniques for the following reasons:(1) Precision is key: small compositional variation on the atomic scale can drastically alter materials properties.(2) Properties exploration and optimization should not be limited by expensive, time-intensive synthetic methodologies.(3) Next-generation materials will require multi-functionality. Methods for creating well-definedheterostructures will be important.(4) Next-generation materials will require in-situ tunable properties. Interaction with external stimuli will be important.SOW:YEAR 1(1) Synthesis and magnetic characterization of M6 Clusters. (2) First demonstration of impurity-cluster seeded semiconductor (colloidal solotronic material). (3) Synthesis of nucleation-cutoff (1-3 nm) ultra-small magnetic nanoparticles.(4) Develop quantitative model of interparticlecoupling effects on magnetization in ultra-small particles.(5) Determine magnetochemical series of surface ligands and demonstrate no drop in anisotropy in ultra-small regime.YEAR 2:(1) Demonstration of oxide-based colloidal solotronic materials.(2) First colloidal synthesis of shape-anisotropic AlNiCo nanoparticles.(3) Demonstration of shell-based exchange spring interaction in AlNiCo. (4) Field-oriented sintering to achieve 5x increase in coercive field.YEAR 3:(1) Lower sintering temperature to sub-500 ~C for high-density exchange-spring magnetic materials.(2) Demonstrate order-of-magnitude magnetic field swtiching behavior in photoactivated nanomaterial.YEAR 4:(1) Prove appearance of superparamagnetic behavior on charge-doping paramagnetic oxide materials.(2) Demonstate first proof-of-principle soft-material heterostructured exchange-spring magnetMerit and Relevance:This project is synergistic with ONR s vision of bottom-up assembled carbon-based molecular electronics. PI is a leading expert in molecular magnetics research and exploitation of spin degree of freedom is one of the major opportunities at the molecular scale electronic system.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 23, 2016
- Source ID
- N000141612917
Entities
People
- Jeffrey D Rinehart
Organizations
- Office of Naval Research
- United States Navy
- University of California, San Diego