Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Something Big from Something Small: VINSE engineers and researchers explore possibilities on the nanoscale

Ben Schmidt, PhD’10, research associate in chemical and biomolecular engineering, measures thin film thickness using VINSE’s profilometer.
Ben Schmidt, PhD’10, research associate in chemical and biomolecular engineering, measures thin film thickness using VINSE’s profilometer.

Abstract:
Vanderbilt researchers working at the smallest scale celebrate a huge milestone this year. The Vanderbilt Institute of Nanoscale Science and Engineering (VINSE), seeded from a university-funded $16 million venture capital fund initiative, celebrates its 10th anniversary in December.

Something Big from Something Small: VINSE engineers and researchers explore possibilities on the nanoscale

Nashville, TN | Posted on April 25th, 2011

There is much to celebrate, including the fact that in the past decade, VINSE has attracted more than $75 million in federal funding for nanoscience research, says VINSE Director Sandra J. Rosenthal.

An interdisciplinary institute devoted to the science and engineering of matter on the atomic scale, VINSE proves that even the smallest matter matters. Through nanotechnology, researchers make extremely small materials—far smaller than the width of a human hair—but with enhanced capabilities relevant to everything from energy use to the efficient delivery of medications.

"The fundamental thing that makes nanoscience interesting is that when you fabricate a material on the nanoscale, new properties are discovered all the time. These new properties open up a myriad of possibilities for potential applications," says Rosenthal, the Jack and Pamela Egan Chair of Chemistry and professor of chemical and biomolecular engineering, chemistry, physics and pharmacology. "We study those possibilities and figure out what applications you can use for those properties."

With partners that include Oak Ridge National Laboratory and Fisk University, VINSE fosters cutting-edge research in biology and medicine, optics, carbon-based nanostructures and sensors, as well as a new emphasis at the interface of nanoscience and energy. Roughly a quarter of Vanderbilt's engineering faculty are part of VINSE, comprising nearly half of the institute's researchers.

In recent months, the institute earned a $5 million stake in a $20 million National Science Foundation grant to strengthen research development infrastructure in Tennessee. A smaller but critically important $569,000 grant from NSF's American Recovery and Reinvestment Act allowed for the renovation of air-handling equipment in the VINSE clean room and an upgrade of the toxic gas monitoring system.
Power of Research

The core facilities of VINSE, created and equipped with $5 million of the initial investment from the university's endowment, provide highly specialized instrumentation. "The fact that we have this kind of fabrication and characterization available has allowed us to land some outstanding individuals who are nanoscience researchers," Rosenthal says.

Among the latest recruits is Assistant Professor of Mechanical Engineering Jason Valentine, an expert on cloaking—hiding objects from view by bending light around them.

While cloaking evokes images from the world of Harry Potter or Star Trek, its more practical applications include the possible creation of ever smaller, lighter and more efficient optical systems and materials for telecommunications and computing.

As a graduate student at University of California-Berkeley, Valentine was part of a research team that created a cloaking technique dubbed a "carpet cloak" made from a silicon sheet and drilled with precisely placed holes. The cloak alters the refraction of light as it passes through the material—thinner than a human hair—making an object appear flat.

"What we are doing is virtually ripping a hole in space," Valentine says, albeit a very tiny hole. Since naturally occurring materials do not have this kind of flexibility in their optical properties, Valentine and the Berkeley research team used metamaterials—artificial materials engineered with nanoscale machining methods—to achieve material structuring much smaller than the wavelength of light.

While the effect was achieved on the two-dimensional scale, Valentine is continuing the next step at Vanderbilt—working toward the fabrication of such materials on a larger scale and in 3-D. These developments could prove useful in manipulating light in silicon chips, the foundation of modern electronics, to enable more efficient and flexible light-routing architectures.

"Cloaking is a great demonstration of the technology and a great way to pull young students into the science field," Valentine says of the public interest in cloaking. "Normally, they wouldn't be aware of scientific breakthroughs."
Saving Energy, Saving Lives

While Valentine works to manipulate light, Rosenthal's lab experienced a breakthrough by producing a new nanomaterial that for the first time emits a white light. Rosenthal aims to make the material bright and white enough to become commercially viable.

"A lot of people said this (discovery of white light on the nanoscale) would never happen. Nobody predicted it," she says.

Rosenthal's lab uses specialized instrumentation to synthesize semiconducting nanocrystals, also called quantum dots. A building block of nanotechnology, quantum dots are just a few millionths of a millimeter across, exhibiting unique electronic, optical and magnetic properties that can be utilized in a variety of technologies.

Among other projects, Rosenthal also is investigating ways to bind drugs to a cell's protein, providing a nanocrystal beacon to track the movement of proteins that control serotonin through the brain. This could be a potential breakthrough in mental health, as an imbalance of serotonin is associated with many major mental illnesses.

"My research is a lot of fun," Rosenthal says. "One day I'm saving the planet trying to develop energy-efficient lighting. Another day I'm trying to do fundamental research that may one day help alleviate the suffering of people with mental illness, and it's nanotechnology that's enabling all of it."

Assistant Professor of Electrical Engineering Sharon Weiss investigates nanotechnology that could potentially help a drug cocktail hone in on hard-to-reach tumors in cancer patients, among other potential applications.

Weiss works with porous silicon crystals. Sponge-like material filled with billions of tiny holes, the crystals can be manipulated through an etching process that allows scientists to load the tiny holes with other substances.

Weiss pairs with Paul Laibinis, professor of chemical and biomolecular engineering, in research that involves synthesizing DNA molecules inside the pores with certain drugs to create a highly selective sensor. By evaluating how light interacts with the porous silicon, it is possible to detect the presence of trace amounts of biological material. This can aid in a number of processes, including the delivery of medicines to very specific areas in the body, Weiss explains.

Looking Ahead

Peter Cummings, the John R. Hall Professor of Chemical Engineering, has been instrumental in shaping the government's National Nanotechnology Initiative Strategy. He recently participated in a strategic directions workshop to provide input into the government's blueprint for nanoscience research for the next decade. (For details, see www.nano.gov).

The science of small has quietly revolutionized many aspects of technology and that revolution is continuing, Cummings says.

He notes that researchers at Vanderbilt and elsewhere are making strides in molecular electronics, with the goal of constructing devices with a switch comprised of just one molecule.

This would represent the ultimate miniaturization of electronics. "People are contemplating what's going to happen beyond silicon," he says of the material that forms the basis of modern computer chips. In fact, Vanderbilt's Weiss, who has a secondary appointment as assistant professor of physics, is working with Richard Haglund, professor of physics, on methods to speed computing processes by using light rather than metal to quickly transfer information. (See Vanderbilt Engineering, fall 2010.)

Cummings says that Vanderbilt engineers are using high-performance computing-based techniques, including the use of GPUs (graphical processing units, primarily developed for video games) to research other aspects of nanoscience, including study of nanoconfined fluids, which are important for lubrication of moving parts in nanoscale devices.

Vanderbilt has a grant, led by Associate Professor of Mechanical Engineering Greg Walker, to build a fast GPU cluster for scientific computation, and Oak Ridge National Laboratory, where Cummings is Principal Scientist in the Center for Nanophase Materials Science, is building a huge GPU cluster in collaboration with Georgia Tech.

Matter even smaller than that of the nanoscale—at the "femto" and "atto" scale—already is under exploration as well. Tools such as atomic force microscopes allow scientists to measure and watch individual chemical reactions take place, moving far beyond the theoretical stage. Cummings says it was just a short time ago that scientists could barely imagine the innovations happening today in nanoscience. "What was inconceivable a couple of decades ago is a reality today," he says.

####

For more information, please click here

Copyright © Vanderbilt Institute of Nanoscale Science and Engineering

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

A new product to help combat mouldy walls, thanks to technology developed at the ICN2 December 14th, 2017

Sandia researchers make solid ground toward better lithium-ion battery interfaces: Reducing the traffic jam in batteries December 13th, 2017

Perking up and crimping the 'bristles' of polyelectrolyte brushes December 13th, 2017

Columbia engineers create artificial graphene in a nanofabricated semiconductor structure: Researchers are the first to observe the electronic structure of graphene in an engineered semiconductor; finding could lead to progress in advanced optoelectronics and data processing December 13th, 2017

Academic/Education

Luleå University of Technology is using the Deben CT5000TEC stage to perform x-ray microtomography experiments with the ZEISS Xradia 510 Versa to understand deformation and strain inside inhomogeneous materials November 7th, 2017

Park Systems Announces the Grand Opening of the Park NanoScience Center at SUNY Polytechnic Institute November 3rd, 2017

Two Scientists Receive Grants to Develop New Materials: Chad Mirkin and Monica Olvera de la Cruz recognized by Sherman Fairchild Foundation August 16th, 2017

Moving at the Speed of Light: University of Arizona selected for high-impact, industrial demonstration of new integrated photonic cryogenic datalink for focal plane arrays: Program is major milestone for AIM Photonics August 10th, 2017

Nanomedicine

Perking up and crimping the 'bristles' of polyelectrolyte brushes December 13th, 2017

Leti to Demo Wristband with Embedded Sensors to Diagnose Sleep Apnea: APNEAband, Which Will Be Demonstrated at CES 2018, Also Monitors Mountain Sickness, Dehydration, Dialysis Treatment Response and Epileptic Seizures December 12th, 2017

Untangling DNA: Researchers filter the entropy out of nanopore measurements December 8th, 2017

Arrowhead Presents New Clinical Data Demonstrating a Sustained Host Response in Hepatitis B Patients Following RNAi Therapy — Up to 5.0 log10 reduction in HBsAg observed; data presented at HEP DART 2017 — December 6th, 2017

Announcements

A new product to help combat mouldy walls, thanks to technology developed at the ICN2 December 14th, 2017

Sandia researchers make solid ground toward better lithium-ion battery interfaces: Reducing the traffic jam in batteries December 13th, 2017

Perking up and crimping the 'bristles' of polyelectrolyte brushes December 13th, 2017

Columbia engineers create artificial graphene in a nanofabricated semiconductor structure: Researchers are the first to observe the electronic structure of graphene in an engineered semiconductor; finding could lead to progress in advanced optoelectronics and data processing December 13th, 2017

Quantum Dots/Rods

Quantum communications bend to our needs: By changing the wavelengths of entangled photons to those used in telecommunications, researchers see quantum technology take a major leap forward September 28th, 2017

Band Gaps, Made to Order: Engineers create atomically thin superlattice materials with precision September 26th, 2017

New approach on research and design for CQD catalysts in World Scientific NANO August 2nd, 2017

Coupling a nano-trumpet with a quantum dot enables precise position determination July 14th, 2017

Photonics/Optics/Lasers

Leti Integrates Hybrid III-V Silicon Lasers on 200mm Wafers with Standard CMOS Process December 6th, 2017

Scientists make transparent materials absorb light December 1st, 2017

Going swimmingly: Biotemplates breakthrough paves way for cheaper nanobots: By using bacterial flagella as a template for silica, researchers have demonstrated an easier way to make propulsion systems for nanoscale swimming robots November 30th, 2017

Fast flowing heat in graphene heterostructures: Surprisingly fast heat flow from graphene to its surrounding November 29th, 2017

Research partnerships

Perking up and crimping the 'bristles' of polyelectrolyte brushes December 13th, 2017

Wheat gets boost from purified nanotubes: Rice University toxicity study shows plant growth enhanced by -- but only by -- purified nanotubes December 6th, 2017

Copper will replace toxic palladium and expensive platinum in the synthesis of medications: The effectiveness of copper nanoparticles as a catalyst has been proven December 5th, 2017

Researchers advance technique to detect ovarian cancer: Rice, MD Anderson use fluorescent carbon nanotube probes to achieve first in vivo success November 30th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project