Navigation Links
Researchers show how to 'stamp' nanodevices with rubber molds
Date:10/22/2008

By manipulating the way tiny droplets of fluid dry, Cornell researchers have created an innovative way to make and pattern nanoscale wires and other devices that ordinarily can be made only with expensive lithographic tools. The process is guided by molds that "stamp" the desired structures.

"You can in principle build almost any types of architectures you want at nanoscale," reported Dan Luo, Cornell associate professor of biological and environmental engineering, postdoctoral researcher Wenlong Cheng and colleagues. Their work is described in the online edition of the journal Nature Nanotechnology and in the October 2008 print issue.

To demonstrate the process, the researchers assembled gold nanoparticles into nanoscale wires, disks, squares, triangles and "corrals" (spaces enclosed by nanowires), and demonstrated that their nanowires could be connected to microfabricated electrodes, and through them to other circuitry. In addition to metal nanoparticles, the process could be applied to quantum dots, magnetic spheres and other nanoparticles, they said. They also assembled arrays of single salt crystals, suggesting that any material capable of crystallization could be manipulated by the process.

They began with gold nanoparticles about 12 nanometers in diameter suspended in water. To suspend metal particles in water, the researchers coated them with a "ligand" that adheres to the metal and to water. A second innovation in the Cornell process is to use single chains of synthetic DNA as the ligand. The DNA molecules extend out from the particles like hairs and, as the water evaporates, entangle the particles with one another. Adjusting the DNA lengths can precisely control the distance between the particles to make them assemble into orderly arrays called superlattices, rather than clumping together at random. Metal superlattices have applications in computer memory and photonics and have unique properties in electronic circuits.

The next step is to press down a silicone rubber mold onto a thin layer of the solution on a silicon substrate. Microscopic holes and channels in the underside of the mold effectively "stamp" the desired shapes on the fluid. As they dry, droplets shrink to create wires and other shapes measured in nanometers from a mold measured in microns. This means, the researchers say, that nanoscale superlattice features -- currently possible only with expensive, specialized equipment -- can be made in an inexpensive way.


'/>"/>

Contact: Blaine Friedlander
bpf2@cornell.edu
607-254-8093
Cornell University Communications
Source:Eurekalert

Related biology technology :

1. Researchers improve ability to write and store information on electronic devices
2. Long-awaited international ethical guidelines for biobank researchers
3. CU researchers shed light on light-emitting nanodevice
4. Stevens researchers provide new information about mass spectrometry
5. Researchers measure carbon nanotube interaction
6. Researchers underscore limitations of genetic ancestry tests
7. ASU researchers improve memory devices using nanotech
8. UD researchers race ahead with latest spintronics achievement
9. Researchers outline structure of largest nonvirus particle ever crystallized
10. Ames Laboratory researchers solve fuel-cell membrane structure conundrum
11. Researchers use magnetism to target cells to animal arteries
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2016)... ... June 23, 2016 , ... In a new case report published today in ... patient who developed lymphedema after being treated for breast cancer benefitted from an injection ... for dealing with this debilitating, frequent side effect of cancer treatment. , ...
(Date:6/23/2016)... , June 23, 2016  Blueprint Bio, a ... discoveries to the medical community, has closed its Series ... Matthew Nunez . "We have received a ... the capital we need to meet our current goals," ... provide us the runway to complete validation on the ...
(Date:6/23/2016)... 23, 2016 On Wednesday, June 22, ... down 0.22%; the Dow Jones Industrial Average edged 0.27% lower ... 2,085.45, down 0.17%. Stock-Callers.com has initiated coverage on the following ... Therapeutics (NASDAQ: NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ... BIND ). Learn more about these stocks by accessing ...
(Date:6/23/2016)... ... 23, 2016 , ... Regulatory Compliance Associates® Inc. (RCA), a ... webinar on Performing Quality Investigations: Getting to Root Cause. This ... charge. , Incomplete investigations are still a major concern to the Regulatory Authorities ...
Breaking Biology Technology:
(Date:5/24/2016)... care by providing unparalleled technology to leaders of the medical imaging industry.  As such, ... to the range of products distributed by Ampronix. Photo - http://photos.prnewswire.com/prnh/20160524/371420 ... ... ... With ...
(Date:5/12/2016)... 12, 2016 WearablesResearch.com , a brand ... overview results from the Q1 wave of its quarterly ... was consumers, receptivity to a program where they would ... health insurance company. "We were surprised to ... Michael LaColla , CEO of Troubadour Research, "primarily ...
(Date:4/28/2016)... FRANCISCO and BANGALORE, India , ... of EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... provider, today announced a global partnership that will ... way to use mobile banking and payment services. ... is a key innovation area for financial services, but it ...
Breaking Biology News(10 mins):