Tailoring Self-Organized Growth of Biomimetic Inorganic-Organic Multilayers with a Permeable Microcompartment

Area of Science:

• Materials Science
• Biomimetics
• Nanotechnology

Background:

• Nature employs inorganic-organic multilayers for strength and toughness, exemplified by nacre.
• Existing biomimetic multilayer fabrication methods like particle assembly and multistep deposition are complex.
• Self-organized synthesis of macroscopic inorganic-organic architectures from molecular subunits is a significant challenge.

Purpose of the Study:

• To introduce a novel self-organized approach for growing inorganic-organic multilayers.
• To utilize a permeable microcompartment for controlled multilayer fabrication.
• To develop a method for creating biomimetic materials with tunable structural and functional properties.

Main Methods:

• A permeable microcompartment enclosed by a graphene oxide membrane was used for self-organized growth.
• Inorganic-organic multilayers were formed via a phase-separation process within the microcompartment.
• A kinetic model was employed to quantitatively describe and regulate layer thickness.

Main Results:

• Multiple mineral layers, separated by organic interlayers, were successfully grown within the microcompartment.
• A kinetic model allowed for predictable control over mineral layer thickness by adjusting boundary conditions.
• The synthetic process demonstrated versatility across various mineral compositions, polymorphs, and organic interphases.
• Incorporation of a continuous polymeric interphase enabled crack deflection for damage localization.

Conclusions:

• Self-organization within a permeable microcompartment offers a viable route to fabricating biomimetic inorganic-organic multilayers.
• This method facilitates the creation of materials with tailored strength, toughness, and damage resistance.
• The approach holds potential for developing advanced materials with diverse structural and functional characteristics.