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Improving the assembly speed, quality, and tunability of thin conductive multilayers
Forrest S Gittleson1, David J Kohn, Xiaokai Li
1Department of Chemical Engineering, Yale University, P.O. Box 208286, New Haven, Connecticut 06520-8286, USA.
ACS Nano
|April 21, 2012
Summary
A new automated spin-spray layer-by-layer (SSLbL) system rapidly produces high-quality, tunable conductive films with nanolevel control. This technique enhances composite multilayer applications, including advanced lithium-ion battery electrodes.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Inhomogeneous thin conductive films offer desirable properties like flexibility and transparency.
- Traditional processing methods, including dip-coating, limit control over multilayer film deposition.
- Layer-by-layer assembly offers improved control but is often slow and inefficient.
Purpose of the Study:
- To introduce and evaluate a fully automated spin-spray layer-by-layer (SSLbL) system for rapid, high-quality multilayer film production.
- To demonstrate nanolevel control over film growth and efficient conducting network formation.
- To explore the tunability and practical applications of SSLbL-assembled composite multilayers.
Main Methods:
- Utilized a fully automated spin-spray layer-by-layer (SSLbL) system for film deposition.
- Achieved bilayer deposition cycle times as low as 13 seconds.
- Characterized film conductance, particularly in the near percolation region, for various polymer-carbon nanotube (CNT) systems.
Main Results:
- SSLbL enabled rapid production of tunable multilayer films with nanolevel control over growth.
- Demonstrated efficient formation of conducting networks superior to traditional methods.
- SSLbL films exhibited enhanced tunability due to control over multiple deposition variables.
- Compared SSLbL with dip-coating, highlighting SSLbL's potential for rapid film screening.
- Evaluated SSLbL-assembled polymer-CNT multilayers as effective lithium-ion battery electrodes.
Conclusions:
- The automated SSLbL system significantly advances multilayer film fabrication, offering unprecedented control and speed.
- SSLbL facilitates the optimization and application of composite multilayers in various fields.
- This technique holds practical promise for developing next-generation energy storage devices like lithium-ion batteries.
