A surprising low-tech tool—Scotch Magic tape—was one of the keys to the discovery
An international group of researchers from the University of Minnesota, Argonne National Laboratory and Seoul National University have discovered a groundbreaking technique in manufacturing nanostructures that has the potential to make electrical and optical devices smaller and better than ever before. A surprising low-tech tool of Scotch Magic tape ended up being one of the keys to the discovery.
The research is published today in Nature Communications, an international online research journal.
Combining several standard nanofabrication techniques—with the final addition of the Scotch Magic tape—researchers at the University of Minnesota created extremely thin gaps through a layer of metal and patterned these tiny gaps over the entire surface of a four-inch silicon wafer. The smallest gaps were only one nanometer wide, much smaller than most researchers have been able to achieve. In addition, the widths of the gaps could be controlled on the atomic level. This work provides the basis for producing new and better nanostructures that are at the core of advanced electronic and optical devices.
One of the potential uses of nanometer-scale gaps in metal layers is to squeeze light into spaces much smaller than is otherwise possible. Collaborators at Seoul National University, led by Prof. Dai-Sik Kim, and Argonne National Laboratory, led by Dr. Matthew Pelton, showed that light could readily be squeezed through these gaps, even though the gaps are hundreds or even thousands of times smaller than the wavelength of the light used. Researchers are very interested in forcing light into small spaces because this is a way of boosting the intensity of the light. The collaborators found that the intensity inside the gaps is increased by as much as 600 million times.
“Our technology, called atomic layer lithography, has the potential to create ultra-small sensors with increased sensitivity and also enable new and exciting experiments at the nanoscale like we’ve never been able to do before,” said Sang-Hyun Oh, one of the lead researchers on the study and a professor of electrical and computer engineering in the University of Minnesota’s College of Science and Engineering. “This research also provides the basis for future studies to improve electronic and photonic devices.”
One of the most surprising outcomes of the research is that Scotch Magic tape was one of the keys to the discovery. Etching one-nanometer-wide gaps into metals is not feasible with existing tools. Instead, the researchers in Oh’s team constructed the nano-gaps by layering atomic-scale thin films on the sides of metal patterns and then capping the structure with another metal layer. No expensive patterning tools were needed to form the gaps this way, but it was challenging to remove the excess metals on top and expose the tiny gaps. During a frustrating struggle of trying to find a way to remove the metal films, University of Minnesota Ph.D. student and lead author of the study Xiaoshu Chen found that by using simple Scotch Magic tape, the excess metals could be easily removed.
“The Scotch tape works nicely, which was unexpected,” said Oh. “Our technique is so simple yet can create uniform and ultra-small gaps like we’ve never been able to do before. We hope that it will rapidly be taken up by many researchers.”
The Latest on: Nanofabrication
- Implantable Sensors Global Market Segmentation and Major Players Analysis 2023on October 15, 2019 at 2:44 am
The conventional biosensors are considered inefficient, as they are costly, bulky, and unreliable. However, nanofabrication and microfabrication technologies have now progressed to the point where the ...
- Vathys (YC W18) Is Hiring a Packaging Engineer/Nanofabrication Engineeron October 1, 2019 at 10:11 pm
Location is ideally in the Bay Area, but remote is also possible if there is a nanofabrication facility (e.g. an university lab) nearby. Generous compensation will be provided to the right talent.
- Nanofabrication tools promise new laser manufacturing methodson September 30, 2019 at 5:00 pm
The recent advances in nanofabrication provide many new opportunities to develop new devices that are cheaper and better than conventional alternatives. Quantum dot lasers, NanoOpto’s polarizers, ...
- Washington Nanofabrication Facilityon August 23, 2019 at 8:35 am
The University of Washington is about to kick off a $37 million renovation of the Washington Nanofabrication Facility, a 15,000-square-foot lab complete with cleanrooms to build nanoscale parts for ...
- Ice lithography: opportunities and challenges in 3D nanofabricationon June 21, 2019 at 7:09 am
Nanotechnology and nanoscience are enabled by nanofabrication. Electron-beam lithography (EBL), which makes patterns down to a few nanometers, is one of the fundamental pillars of nanofabrication. In ...
- Ice lithography: opportunities and challenges in 3D nanofabricationon June 20, 2019 at 5:00 pm
A fresh review "Ice lithography for 3D nanofabrication" by Prof. Min Qiu at Westlake University is published in Science Bulletin. In this review, the authors present current status and future ...
- Nanosensors and Nanofabrication: What it is and What is Holding Us Backon April 30, 2019 at 7:11 pm
Ammeter is in circuit to measure current and report a change in current. Nanofabrication is the method of producing nanosensors, and there are countless ways of doing this. The two categories commonly ...
- An Introduction to Nanotechnology — Nanosensors and Nanofabricationon April 2, 2019 at 9:36 pm
When a dangerous disease like Cancer is detected early, it can also be treated more efficiently and effectively. Nanofabrication is the process by which Nano materials are created. There are many, ...
- New cell-sized micro robots might make incredible journeyson March 8, 2019 at 11:56 am
Researchers have created tiny functional, remote-powered, walking robots, developing a multistep nanofabrication technique that turns a 4-inch specialized silicon wafer into a million microscopic ...
- An In-Depth Look at Bottom Up Nanofabricationon November 16, 2018 at 6:37 am
Nanofabrication is a way of making devices, systems, and components on a nanoscale. There are two main types of nanofabrication, top-down and bottom-up nanofabrication. Top-down nanofabrication ...
via Google News and Bing News