[Paper Review] Autonomous nanoparticle synthesis by design

Andy S. Anker, Jonas Jensen+10 more|ArXiv.org|May 19, 2025

Nanotechnology research and applications3 citations

TL;DR

The paper presents ScatterLab, an autonomous framework that designs synthesis protocols by matching real-time scattering data to simulated target patterns, enabling on-demand synthesis of bespoke atomic-scale nanoparticle structures without prior synthesis knowledge.

ABSTRACT

Controlled synthesis of materials with specified atomic structures underpins technological advances yet remains reliant on iterative, trial-and-error approaches. Nanoparticles (NPs), whose atomic arrangement dictates their emergent properties, are particularly challenging to synthesise due to numerous tunable parameters. Here, we introduce an autonomous approach explicitly targeting synthesis of atomic-scale structures. Our method autonomously designs synthesis protocols by matching real time experimental total scattering (TS) and pair distribution function (PDF) data to simulated target patterns, without requiring prior synthesis knowledge. We demonstrate this capability at a synchrotron, successfully synthesising two structurally distinct gold NPs: 5 nm decahedral and 10 nm face-centred cubic structures. Ultimately, specifying a simulated target scattering pattern, thus representing a bespoke atomic structure, and obtaining both the synthesised material and its reproducible synthesis protocol on demand may revolutionise materials design. Thus, ScatterLab provides a generalisable blueprint for autonomous, atomic structure-targeted synthesis across diverse systems and applications.

Motivation & Objective

• Motivate automated, design-driven synthesis of materials with specified atomic structures.
• Develop a general framework that maps real-time total scattering and PDF data to simulated target patterns.
• Demonstrate autonomous protocol design for synthesis without prior synthesis knowledge.
• Showcase the method on structurally distinct gold nanoparticles to validate versatility.

Proposed method

• Use real-time total scattering (TS) and pair distribution function (PDF) data as feedback signals.
• Match experimental TS/PDF to simulated target patterns to guide synthesis decisions.
• Autonomously generate synthesis protocols that produce solid targets without pre-existing synthesis knowledge.
• Apply the approach at a synchrotron facility to validate practicality in real experimental conditions.

Experimental results

Research questions

• RQ1 Can autonomous control design produce synthesis protocols that yield specified atomic-scale structures from real-time TS/PDF data?
• RQ2 Is it possible to synthesize distinct nanoparticle architectures (e.g., decahedral and FCC gold NPs) using this autonomous framework?
• RQ3 What is the generalizability of ScatterLab to different materials and synthesis environments?

Key findings

• Successfully synthesized two structurally distinct gold nanoparticles: 5 nm decahedral and 10 nm face-centered cubic, using autonomous design.
• The system operates by aligning real-time TS/PDF with simulated target patterns to steer synthesis.
• Demonstrates on-demand synthesis and reproducible protocol generation without prior synthesis knowledge.
• Provides a generalizable blueprint (ScatterLab) for atomic-structure-targeted autonomous synthesis across systems.