Kono also expects the gated and aligned
nanotube films will give physicists the opportunity to study Luttinger liquids, theoretical collections of interacting electrons in one - dimensional conductors.
By learning how to manipulate the transparency, scientists may be able to start incorporating
nanotube films into products that now rely on slower or heavier components, such as metal oxide.
The scientists spent some time trying to affect the optical properties of carbon
nanotube films with an electric field, with little success, said Itkis, a research scientist at the Center for Nanoscale Science and Engineering.
They discovered that by adding ionic liquid — a kind of liquid salt — they can modify the optical transparency of single - walled carbon
nanotube films in a controlled pattern.
«Microcombing» creates stronger, more conductive carbon
nanotube films.»
«New uses for tiny carbon nanotubes: Adding ionic liquid to
nanotube films could build smaller gadgets.»
The devices, made from transparent and flexible carbon
nanotube films, don't require any of the bulky magnets and sound cones of conventional speakers.
Ray Baughman, a materials scientist and carbon
nanotube film pioneer at the University of Texas, Dallas, adds that the simplicity of the new speakers is «a big plus» for paving the way toward potential applications, including speaking clothing that could aid the physically or mentally impaired.
In this application,
a nanotube film with an array of electrodes can be used as an electrically configurable diffraction grating for an infrared spectrometer, allowing the wavelength of light to be scanned without moving parts.
Not exact matches
The bottom layer of the material, described April 3 at the Materials Research Society spring meeting, features carbon
nanotube pores embedded within a flexible synthetic polymer
film.
Team members sprayed carbon
nanotubes onto a plastic
film — two such
films act as both the device's electrodes and charge collectors.
Instead, the device developed by physicist Kaili Jiang of Tsinghua University in Beijing is just a thin
film of
nanotubes.
Electronics companies have been working for years to replace ITO with transparent conductors made from
films of carbon
nanotubes.
Ultrathin
films made from aligned carbon
nanotubes (left) blare as loudly and clearly as conventional speakers.
Laid down in thin
films, randomly oriented carbon
nanotubes form conductive networks that can serve as electrodes; patterned and layered
films can function as sensors or transistors.
This one packs an interconnected network of graphene and carbon
nanotubes so tightly that it stores energy comparable to some thin -
film lithium batteries — an area where batteries have traditionally held a large advantage.
Plank and her team attached their estrogen - binding aptamers to the other important part of their device: the carbon
nanotube thin
film field effect transistor (CNT FET).
The heating concept is based on a
film that is coated with conductive carbon
nanotubes (CNTs).
Researchers with Berkeley Lab and the University of California (UC) Berkeley have created tactile sensors from composite
films of carbon
nanotubes and silver nanoparticles similar to the highly sensitive whiskers of cats and rats.
The paper is titled «Highly sensitive electronic whiskers based on patterned carbon
nanotube and silver nanoparticle composite
films.»
Her thesis continued her focus on DLC
films and extended her analysis to other types of carbon such as graphene and carbon
nanotubes.
One group stuck the
nanotubes onto a polymer
film and used ionized argon gas to slice open each tube, resulting in ribbons as narrow as 6 nanometers wide.
As she sets up her own lab, Casiraghi's focus will shift from DLC
films to carbon
nanotubes.
«Single - walled carbon
nanotube field - effect transistors (FETs) have characteristics similar to polycrystalline silicon FETs, a thin
film silicon transistor currently used to drive the pixels in organic light - emitting (OLED) displays,» said Mark Hersam, Dodabalapur's coworker and a professor in the McCormick School of Engineering and Applied Science at Northwestern University.
One research group first stuck the
nanotubes to a polymer
film, then used argon gas to etch away a strip from each tube to produce the nanoribbons.
Ying Zhou and Reiko Azumi from Japan's National Institute of Advanced Industrial Science and Technology reviewed the latest research on the use of carbon
nanotubes in manufacturing an important component of optoelectronic devices called transparent conductive
films (TCFs).
Scientists Feihu Wang, Mikhail Itkis and Elena Bekyarova were looking at ways to improve the electrical behavior of carbon
nanotubes, and as part of their research they also looked at whether they could modulate the transparency of the
films.
These
films allowed for experiments that were far too difficult to carry out on single or tangled aggregates of
nanotubes and caught the attention of Tokyo Metropolitan physicist Kazuhiro Yanagi, who studies condensed matter physics in nano materials.
«The gating technique is very interesting, but the
nanotubes were randomly oriented in the
films I had used,» Yanagi said.
«That situation was very frustrating because I could not get precise knowledge of the one - dimensional characteristics of
nanotubes in such
films, which is most important.
Northwestern University researchers recently used metallic
nanotubes to make flexible, semi-transparent, highly conductive
films that can be used for devices such as flat - panel displays and solar cells.
«High purity carbon
nanotube thin
films not only have the potential to make inroads into current applications but also accelerate the development of emerging technologies such as organic light - emitting diodes and organic photovoltaic devices.
While most current hydrogen production processes split hydrogen from natural gas — an inefficient technique that consumes energy and produces greenhouse gases — Grimes» method would rely on thin
films made of titanium iron oxide
nanotube arrays that could split water under natural light.