Talking to a UCF nanoscientist about nanoscience is like chasing one person down 10 paths at the same time. Conversation veers wildly. One minute you’re talking about sunscreen, the next minute lasers. Ask a question about cell phones; get an answer about smoke alarms. And just when you think you’re heading toward rocket science, you turn a corner and run right into cancer treatment.
Welcome to the far-reaching, mind-boggling world of nanoscience.
For nonscientists to understand this world, they must know that a nano is not a thing, but a unit of measurement. A nanometer (nm) is defined as one-billionth of a meter. To put this in perspective, consider that the pinhead measures about 1 million nm across, a human hair about 80,000 nm in diameter, and a DNA molecule between 1–2 nm.
Strange things happen when materials reach nano size. Silver is completely nontoxic in its common form, yet nanosilver particles are capable of killing viruses on contact. Aluminum, generally considered a stable and soft metal, is combustible as a nanoparticle, and two years ago, researchers unveiled nano-engineered aluminum alloys that are stronger than steel.
Dr. Sudipta Seal, director of the NanoScience Technology Center and the Advanced Materials Processing and Analysis Center (AMPAC) at UCF, asks his classes, “When is gold not gold? When it is nanogold, which can be many different colors.”
Nanomaterials do exist in nature—volcanic ash, smoke and sea spray all contain nanoparticles. And as early as the 1600s, alchemists were using chemical reactions to create nanogold, which can still be seen in stained glass windows. But it wasn’t until the invention of the scanning tunneling microscope in 1981 that scientists could actually see what was happening and begin manipulating materials at the nano scale. The discovery of fullerenes in 1986, specially shaped carbon nanoparticles that exhibit unusual strength and conductivity, kicked off an explosion in nano research as scientists raced to uncover the true potential of these exciting materials.
Today, nanoscientists capitalize on the unique properties of nanomaterials to create new materials, systems and devices. The new Boeing 787 Dreamliners, for instance, are built with nanofiber composites that are stronger, lighter and more fuel-efficient than aluminum and steel.
Some of the key discoveries made in UCF NanoScience Technology Center labs have the potential to lead to these remarkable real-world applications:
For more information on NSTC research, visit nanoscience.ucf.edu.
Inside the 21,000-square-foot UCF NanoScience Technology Center (NSTC), faculty members, students and research staff members are exploring nanotechnology’s vast possibilities. Nanomaterials are being used as drug delivery systems. As the building blocks of highly precise lasers. As the key to more efficient solar energy, rocket propulsion and environmental waste cleanup. The scope is so wide that you can’t help but wonder how the NSTC narrows down its field of research applicants to choose the next projects.
“We always try to see what is the next big thing needed to fuel the economy,” explained Seal. Then almost immediately, he expanded the possibilities. “We choose things to contribute to the next frontiers of science.”
According to Seal, those frontiers lie in the areas of medicine, energy, water purification, environmental cleanup and green technology. His own research focuses on the development of nanofuels and industrial materials that produce less environmental waste.
“New technologies are always trying to mimic what nature has been doing all along,” he says. “So, can we create solar panels that convert energy as efficiently as those tiny leaves create energy for a massive tree? Can we engineer cancer therapies that work as efficiently as our own cells that differentiate uncontrollably and cause cancer in the first place? That’s what our research is asking.”
Even when researchers find the answer in the labs, the road to market can take more than a decade. To date, NSTC researchers have launched six spin-off companies to advance their research from the
lab setting to marketable consumer products and patient therapies.
The process takes both time and money. While NSTC projects have received grants from several local and federal partners, including the National Institutes of Health, NASA and the Army Research Laboratory, nanotechnology funding overall is on the decline in the U.S.
O’Neal remains optimistic about the future potential of the field.
“It took 40 years for science to tap into the full potential of laser technology,” he says. “That’s how it will be with nano. The discoveries are just starting to become more prolific. People will get excited about nano again, and the funding will follow, but it won’t be because of one big thing. A bunch of small successes can add up to a pretty big change.”
For the science of small, perhaps there will be no revolution. Just an evolution of our world happening all around us, in baby steps.✦