Using a new assembly process, a team of researchers at Northeastern University’s National Science Foundation (NSF) Nanoscale Science and Engineering Center for High-rate Nanomanufacturing (CHN) manufactured large-scale patterned single-walled nanotube (SWNT) networks in complex patterns.
Led by Ahmed Busnaina, Ph.D., the William Lincoln Smith professor and director of Northeastern’s CHN, and professor Yung-Joon Jung, the researchers built intricate SWNT architectures with a high degree of accuracy, laying the foundation for the nanomanufacturing industry to overcome a major obstacle – precise and accurate placement of SWNTs.
These findings were published online in the Journal of the American Chemical Society. The research was funded by the National Science Foundation.
The researchers used a nanotemplate guided fluidic assembly process for optimum accuracy and control over the placement of the SWNTs on a silicon wafer. Using this fluidic assembly process for the SWNTs assembly enabled a highly controlled environment at the nanoscale. A surface treatment on the substrate, or wafer, made SWNTs highly attracted to the surface. As a result, the team was able to build highly organized SWNT architectures in various dimensions and geometries.
This assembly method can be extended to scales as small as a few nanometers while the length of the architecture is scalable up to 12” wafers.
“This novel process helps us better understand the fundamental mechanism governing the assembly of SWNTs and it finally makes building large-scale (wafer-level) nanoscale structures and networks of single-walled nanotubes possible,” said Busnaina.
The potential applications of these complex structures include transistors, horizontal interconnect systems, complex SWNT-based materials and various types of sensors, batteries, photovoltices, medical and biotechnology applications.
Other Northeastern researchers involved in this study include Dr. Sivasubramanian Somu, Dr. Yoland Echegoyen Sanz and graduate students Laila Jaber-Ansari and Myung Gwan Hahm.
About the NSF Nanoscale Science and Engineering Center for High-rate Nanomanufacturing
In the fall of 2004, the National Science Foundation awarded Northeastern University and its partners, the University of Massachusetts Lowell, the University of New Hampshire, Michigan State University and the Museum of Science, a Nanoscale Science and Engineering Center for high-rate Nanomanufacturing with funding of $12.4 million over five years. The Center for high-rate nanomanufacturing is focused on developing tools and processes that will enable high-rate/high-volume bottom-up, precise, parallel assembly of nanoelements (such as carbon nanotubes, nanoparticles, etc.) and polymer nanostructures. The center nanotemplates are utilized to conduct fast massive directed assembly of nanoscale elements by controlling the forces required to assemble, detach, and transfer nanoelements at high rates and over large areas. The developed nanotemplates and tools will accelerate the creation of highly anticipated commercial products and will enable the creation of an entirely new generation of applications.About Northeastern
Jenny Eriksen | Newswise Science News
A novel synthetic antibody enables conditional “protein knockdown” in vertebrates
20.08.2018 | Technische Universität Dresden
Climate Impact Research in Hannover: Small Plants against Large Waves
17.08.2018 | Leibniz Universität Hannover
There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.
The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
20.08.2018 | Information Technology
20.08.2018 | Life Sciences
20.08.2018 | Information Technology