Quadrupole Magnetic Assembly of Tunable Chiral Superstructures

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Solution Overview

Problem

There is a need for a broadly applicable and simple approach to assemble chiral superstructures, as existing methods are limited in their scalability and versatility in incorporating achiral materials of diverse sizes, shapes, and chemical compositions.

Innovation Solution

The method involves applying a quadrupole magnetic field to magnetic nanostructures, which are then configured into chiral superstructures by controlling the magnitude and direction of the magnetic field, allowing for the assembly of chiral structures at all scales.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If chiral additives (molecules, templates, light) are used to induce chirality in achiral inorganic building blocks, then chiral superstructures can be formed, but the approach is limited in scalability and versatility for diverse materials

Engineering Contradiction:

Improveversatility in incorporating achiral materials of diverse sizes, shapes, and chemical compositionsVSAvoidcomplexity of assembly approach

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces chemical mechanisms (chiral additives, templates) with a magnetic field-based mechanical/physical assembly approach. Magnetic fields exert forces and torques on magnetic nanostructures to induce chiral superstructure formation without requiring chiral chemical additives, thereby achieving versatility across diverse materials while simplifying the assembly process.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes changes in magnetic field parameters (strength, direction, gradient) to control the assembly of achiral magnetic nanostructures into chiral superstructures. By adjusting these physical parameters, the system achieves versatility in assembling different materials without complex chemical protocols.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If mechanical force is applied to nanorod assemblies to induce handedness, then chirality can be imparted, but the method lacks broad applicability

Engineering Contradiction:

Improvebroad applicabilityVSAvoidsimplicity of approach

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent replaces direct mechanical force application with magnetic field-based actuation. Magnetic fields can remotely and uniformly apply forces and torques to magnetic nanostructures throughout the sample volume, achieving broad applicability while maintaining operational simplicity through non-contact control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic field assembly approach serves multiple functions: it induces chirality, controls orientation, and assembles diverse magnetic nanostructures (nanorods, nanoparticles, nanoshells) with different sizes, shapes, and compositions into chiral superstructures, demonstrating universal applicability across material systems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 approach enables the rapid and reversible assembly of chiral superstructures from various materials, with actively tunable chiroptical properties, and is feasible for nanostructures of different sizes and shapes.

Implementation Method 1

applying a quadrupole magnetic field to a plurality of magnetic nanostructures and configuring the plurality of magnetic nanostructures into a chiral superstructure by controlling a magnitude and a direction of the quadrupole magnetic field

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

magnetic assembly of chiral structures at all scales

Methodology Applied

Scientific EffectMagnetism: Magnetism

Data Source

PatentUS20250201454A1General magnetic assembly approach to chiral structures at all scales

Publication Date: 2025.06.19 RGT UNIV OF CALIFORNIA

AI summary

A method of assembling a chiral superstructure includes applying a quadrupole magnetic field to a plurality of magnetic nanostructures and configuring the plurality of magnetic nanostructures into a chiral superstructure by controlling a magnitude and a direction of the quadrupole magnetic field. A magnetic chiral superstructure includes a plurality of magnetic nanostructures assembled into a chiral superstructure by applying a quadrupole magnetic field to the plurality of magnetic nanostructures and configuring the plurality of magnetic nanostructures into a chiral superstructure by controlling a magnitude and a direction of the quadrupole magnetic field.