Tetra-phase Polyelemental Nanoparticles via Block Copolymer Lithography
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Solution Overview
Problem
There is a limited understanding of how phases form in polyelemental nanomaterials and how specific classes of interfaces can be designed and synthesized, which hinders the development of novel and functional nanostructures for applications in catalysis, plasmonics, and electronics.
Innovation Solution
Scanning probe block copolymer lithography is used to synthesize tetra-phase polyelemental nanoparticles by selecting tri-phase nanoparticle architectures, identifying groups of metals, forming nanoreactors with a block copolymer ink, and annealing under specific conditions to create complex heterostructures with unprecedented combinations of elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-phase nanoparticles with higher compositional diversity and structural complexity are synthesized, then the functional properties and collective characteristics are improved, but the understanding and control of interface formation and architecture design are insufficient
Solution Approach 1:
The patent segments the complex multi-phase nanoparticle system into manageable components by systematically studying tri-phase architectures first (using metals like Au, Co, Ni, Cu, Pd, Pt, Ag combined with PdSn alloys). This segmentation approach allows researchers to understand interface formation in simpler three-phase systems before scaling to four-phase and higher complexity structures, making the interface formation processes more comprehensible and controllable.
Solution Approach 2:
The patent applies preliminary action by using scanning probe block copolymer lithography to pre-define the spatial arrangement and composition of metal domains before final nanoparticle formation. The block copolymer template establishes the architectural framework (such as pie-shaped or striped configurations) in advance, guiding subsequent metal deposition and phase formation processes to achieve desired multi-phase architectures with controlled interfaces.
2Reliability
If the number of phases in nanoparticles is increased to four or more, then the synergistic effects and collective properties are enhanced, but the role of surface/interfacial energy in controlling architecture becomes less predictable
Solution Approach 1:
The patent systematically varies key parameters including metal composition ratios, annealing temperatures, and block copolymer molecular weights to control surface and interfacial energy balances in multi-phase nanoparticles. By adjusting these parameters, the research demonstrates how to achieve stable tetra-phase and higher-order architectures with predictable interface formation, transforming the previously unpredictable architecture control into a tunable process.
Solution Approach 2:
The patent employs composite material strategies by combining multiple metal phases (such as Au-Co-Ni-Cu-Pd-Sn systems) within single nanoparticles, creating complex heterostructures with distinct functional domains. The use of PdSn alloys as a base component combined with other metals allows for controlled phase separation and interface formation, enabling reliable synergistic effects while maintaining architectural control through the composite nature of the materials.
3Adaptability or versatility
If scanning probe block copolymer lithography is used to synthesize polyelemental nanoparticles, then specific heterostructures with unprecedented element combinations can be created, but the manufacturing process complexity increases
Solution Approach 1:
The patent demonstrates universality by showing that the scanning probe block copolymer lithography platform can synthesize a wide variety of polyelemental nanoparticle compositions and architectures using a single standardized approach. The same block copolymer template and metal precursor combination can produce different multi-phase structures by varying metal ratios and annealing conditions, eliminating the need for entirely different synthesis methodologies for each element combination and simplifying the overall manufacturing process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for the systematic design and synthesis of polyelemental systems with specific heterostructures, enabling the creation of nanoparticles with unique architectures that can exhibit collective properties not observed in individual components, impacting the development of materials and devices across various fields.
Implementation Method 1
contacting a tip coated with an ink to a substrate to form a nanoreactor, the ink comprising block copolymer
Implementation Method 2
annealing the nanoreactors under conditions sufficient to synthesize a tetra-phase polyelemental nanoparticle
Data Source
AI summary
Disclosed herein are method and design rules for making polyelemental systems with specific heterostructures, including tetra-phase nanopartides with as many as six junctions. In accordance with an embodiment, a method of making a tetra-phase polyelemental nanoparticle using tri-phase nanoparticle architectures can include selecting two or more triphase nanoparticle architectures, wherein the two or more tri-phase nanoparticle architectures are one or more striped tri-phase architectures, one or more pie-shaped tri-phase architectures, or combinations thereof; identifying from the selected two or more tri-phase nanoparticle architectures groups of metals for generating each of the two or more tri-phase nanoparticle architectures; contacting a tip coated with an ink to a substrate to form a nanoreactor, the ink comprising block copolymer and the metals from the groups of metals identified for generating each of the two or more tri-phase nanoparticle architectures; and annealing the nanoreactors under conditions sufficient to synthesize a tetra-phase polyelemental nanoparticle.