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Updated: May 13, 2025
Particle Templated Emulsification enables Microfluidic-Free Droplet Assays
Published on: March 9, 2021
Microfluidics-driven templating preparation of polymer vesicles with tailorable dimensions and rapid cellular
Donghua Dong1, Tong Zhu1, Guoxing Liao1
1South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, South China University of Technology, Guangzhou 510640, China. lingewang@scut.edu.cn.
A novel microsphere-templated method precisely controls polymer vesicle size and architecture. This microfluidic approach enables on-demand tuning for advanced applications in drug delivery and nanoreactors.
Area of Science:
- Biomedical Engineering
- Materials Science
- Nanotechnology
Background:
- Conventional polymer vesicle fabrication methods lack control over vesicle architecture due to stochastic self-assembly.
- Limitations in current methods hinder precise control over vesicle size and uniformity, impacting their biomedical applications.
Purpose of the Study:
- To develop a novel microsphere-templated strategy for controlled polymer vesicle fabrication.
- To overcome the limitations of conventional methods by synergizing microfluidic precision with block copolymer assembly.
- To enable on-demand size tuning of polymer vesicles, a capability not achievable with traditional approaches.
Main Methods:
- Engineering emulsion templates using microfluidics by optimizing flow rate, block copolymer concentration, and collection distance.
- Utilizing the radius-square law to govern the evolution of uniform vesicles.
- Multi-scale characterization including Dynamic Light Scattering (DLS), Optical Microscopy (OM), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) to elucidate the templating-to-vesicle transition.
Main Results:
- Achieved uniform polymer vesicles with a size range diameter of 70-170 nm and a Polydispersity Index (PDI) of 0.16.
- Demonstrated on-demand size tuning of vesicles, a significant advancement over traditional methods.
- The resultant nanoscale vesicles showed rapid cellular uptake (>95% in 3 hours) by HUVECs and 4T1 cells with high biocompatibility (>85% viability at 36 hours).
Conclusions:
- The microsphere-templated strategy provides a scalable platform for precision polymer vesicle fabrication.
- Established foundational principles for templated self-assembly, bridging microfluidics and soft matter science.
- The methodology opens new avenues for tailored vesicles in drug delivery, nanoreactors, and synthetic biology.
