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Related Experiment Video

Updated: Jul 18, 2026

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method

Published on: April 18, 2019

Two-level antibacterial coating with both release-killing and contact-killing capabilities.

Zhi Li¹, Daeyeon Lee, Xiaoxia Sheng

¹Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Langmuir : the ACS Journal of Surfaces and Colloids

|November 17, 2006

Summary

This study developed dual-functional bactericidal coatings that kill bacteria using both released chemicals and direct contact. These advanced coatings offer sustained antibacterial activity through layered silver ions and quaternary ammonium salts.

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High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

Published on: November 5, 2016

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Last Updated: Jul 18, 2026

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method

Antimicrobial Synergy Testing by the Inkjet Printer-assisted Automated Checkerboard Array and the Manual Time-kill Method

Published on: April 18, 2019

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

Published on: November 5, 2016

Area of Science:

Materials Science
Nanotechnology
Biomedical Engineering

Background:

Developing effective antibacterial surfaces is crucial for preventing microbial contamination and infections.
Existing antibacterial coatings often have limitations in sustained efficacy or dual-action capabilities.

Purpose of the Study:

To engineer novel dual-functional bactericidal thin film coatings.
To combine chemical-releasing and contact-killing antibacterial mechanisms in a single coating.

Main Methods:

Utilized aqueous layer-by-layer deposition for coating construction.
Incorporated nanoparticle surface modification and nanoreactor chemistry.
Designed distinct functional regions for chemical release and immobilized bactericides.

Main Results:

Successfully created coatings with two functional layers: a chemical reservoir and a bactericide-loaded nanoparticle cap.
Demonstrated dual-action bactericidal properties, including chemical release (Ag ions) and contact killing (quaternary ammonium salts).
Achieved high initial bacterial killing efficiency and sustained antibacterial activity post-silver depletion.

Conclusions:

The developed dual-functional coatings provide a robust strategy for combating bacterial contamination.
Layered design ensures both immediate and long-term antibacterial efficacy.
This approach holds promise for applications requiring persistent antimicrobial surfaces.