- Education & Outreach
- Advanced Print and Roll to Roll Manufacturing Facility
- Nanoimprint Lithography & Hybrid Coating R2R Coaters
- Conte Nanotechnology Cleanroom Lab
- Nuclear Magnetic Resonance Facility
- UMass-Amherst Mass Spectrometry Center
- W.M. Keck Center for Electron Microscopy
- W.M. Keck Nanostructures Laboratory
- Hysitron Triboindenter
- Nanonex Nanoimprinter
XEI Scientific and University of Southern California announce a publication in Advanced Materials on the use of downstream plasma cleaning
XEI Scientific Inc. reports a new publication from their user group at the Ming Hseih Department of Electrical Engineering at the University of Southern California, Los Angeles. The paper released in...
JPK reports on the use of optical tweezers in the Schieber Research Group at Illinois Institute of Technology
JPK Instruments, a world-leading manufacturer of nanoanalytic instrumentation for research in life sciences and soft matter, reports on the use of their NanoTracker optical tweezers system to study c...
Los Alamos Offers New Insights Into Radiation Damage Evolution: TUnderstanding defects in materials aids in performance predictions
Two reports from Los Alamos National Laboratory this week in the Nature journal Scientific Reports are helping crack the code of how certain materials respond in the highly-damaging radiation environm...
FEI Joins University of Ulm and CEOS on SALVE Project Research Collaboration: The Sub-Ångström Low Voltage Electron (SALVE) microscope should improve contrast and reduce damage on bio-molecules and two-dimensional nanomaterials, such as graphene
FEI (NASDAQ: FEIC) announced today that it has entered into an agreement with Germany's University of Ulm and Heidelberg-based CEOS GmbH to develop a sub-Ǻngström low-voltage electron microscope,...
A new technique invented at Caltech to produce graphene--a material made up of an atom-thick layer of carbon--at room temperature could help pave the way for commercially feasible graphene-based solar...
Rice fine-tunes quantum dots from coal: Rice University scientists gain control of electronic, fluorescent properties of coal-based graphene
Graphene quantum dots made from coal, introduced in 2013 by the Rice University lab of chemist James Tour, can be engineered for specific semiconducting properties in either of two single-step process...
Researchers at the Okinawa Institute of Science and Technology Graduate University (OIST) have demonstrated a more robust method for controlling single, micron-sized particles with light.
30 years after C60: Fullerene chemistry with silicon: A long strived-for silicon dodecahedron synthesised at room temperature
The discovery of the soccer ball-shaped C60 molecule in 1985 was a milestone for the development of nanotechnology. In parallel with the fast-blooming field of research into carbon fullerenes, researc...
Engineers at the University of California, Berkeley, are developing a new type of bandage that does far more than stanch the bleeding from a paper cut or scraped knee. Thanks to advances in flexible e...
Technique might be useful for making solar cells.
Although there are many potential applications for carbon nanotubes (CNTs), their wide scale consumer applications to date have been limited to serving as polymer additives to yield higher-strength composites. Even though bulk nanotubes exhibit tensile strengths much less than individual nanotubes (especially single-walled varieties), bulk CNT additives have been shown to enhance the strength:weight ratio of a variety of sporting equipment such as bicycles, skies, baseball bats, hunting arrows, and surfboards. Beyond their high-strength properties, the extraordinary electrical conductivity of CNTs makes these nanostructures ideal for microelectronics circuitry applications. Using advanced techniques such as near-field electrospinning (NFES), it is now possible to generate conductive nanotube fibers that span up to a few hundred meters. However, current fiber processing techniques are difficult to scale up, and often experience difficulties with nanotube alignment during fiber spinning. This latter limitation is an important consideration for microelectronics applications, since unaligned nanotubes would deleteriously affect the conductivity of the deposited fibers. The recent report by Huang et al. describes an improved fiber-drawing technique that consists of simple handwriting of conductive fibers using a common pen tip. Patterns may easily be placed onto both planar and non-planar substrates using this strategy. The fiber drawing speed is reported to be ca. 10 cm/s, which represents a large improvement relative to other techniques that are much too slow for commercial scale up, with patterning speeds of < 1 mm/s (most often in the mm/s range). Patterning consists of using poly(ethylene oxide), PEO, in the presence of surfactants and carbon nanotubes, which forms a polymeric ink. The choice of PEO was due to its desirable viscoelastic properties, which allowed for the continuous pulling of fibers from the solution without breakage. In contrast, fibers drawn from solutions of poly(methyl methacrylate), PMMA, commonly used in other patterning techniques, have much larger diameters and inconsistent conductivities due to less effective alignment of nanotubes comprising the fiber. Whereas PEO in the absence of CNTs dried to form nanofibers with diameters of ca. 60 nm, the diameter range of PEO-CNT composite fibers was ca. 300 nm 3 mm. One is able to vary the diameter of the composite PEO-CNT fibers, based on the solution concentration and volume used in the pen tip. Fiber lengths in excess of 50 cm were achieved using this technique, and featured a high degree of nanotube alignment especially for low-diameter fibers. Consequently, the conductivity of the fibers were significantly higher than isotropic CNT thin films. In contrast to other techniques that require the use of micro/nanomanipulators to appropriately position fibers into electronic circuitry, this direct-writing procedure is able to place the conductive fibers directly into desired positions with submicron control. The fibers may also be transferred to other substrates after drying without changing their morphologies or electrical conductivities. With a surge in flexible and wearable electronic devices on the horizon, it is essential that techniques exist for the fabrication of flexible conductive wires. This work represents an attractive strategy, and results in fibers that may be easily fabricated using a common pen tip and placed onto a variety of surfaces. Furthermore, the conductivity of the fibers is not altered by repeated bending tests, which should enable this technique to be used for the next generation of flexible touchscreens, wearable electronics, and the batteries or supercapacitors that will be needed to power these devices. Further testing is needed to assess the adsorption of the PEO-CNT fibers to textiles, LCDs, and other surfaces. However, this technique shows promise for the fast assembly and precise placement of conductive fibers into electronic circuits. Reference: Huang S, Zhao C, Pan W, Wu H. Direct Writing of Half-Meter Long CNT Based Fiber for Flexible Electronics. Nano Letters. 2015; 15 (3): 1609-1614 doi: 10.1021/nl504150a (http://pubs.acs.org/doi/abs/10.1021/nl504150a) Image reprinted with permission from American Chemical Society.
Categories: National Nanomanufacturing Network
Breakthrough could mean smaller and lighter energy-storage systems
Oxford Instruments announces Dr Isabel Guillamón as winner of the 2015 Nicholas Kurti Science Prize for Europe
Oxford Instruments is delighted to announce the winner of the 2015 Nicholas Kurti Science Prize for Europe as Dr Isabel Guillamón, from the Condensed Matter Physics Department at the Universidad Autón...
Precision positioning systems specialist Physik Instrumente (PI) recently introduced a new series of miniaturized, piezo-driven linear positioners at the 2015 Photonics West conference -- the world's...
NNI Releases Supplement to the Presidents 2016 Budget: Budget provides $1.5 billion in funding; details progress on NSIs, collaborations between Federal agencies
The President's Budget for Fiscal Year 2016 provides $1.5 billion for the National Nanotechnology Initiative (NNI), a continued Federal investment in support of the President's priorities and innovati...
Nanotechnology Drug Delivery Market in the US 2012-2016 : Latest Report Available by Radiant Insights, Inc
RadiantInsights.com include new market research report on "Nanotechnology Drug Delivery Market Size, Share, Trneds & Analysis Report up to 2012-2016" to its huge collection of research reports.
Maps predict strength of structures: Rice researchers' theory combines strength, stiffness and toughness of composites into a single design map
Mother-of-pearl, the iridescent layer in the shells of some mollusks, inspired a Rice University study that will help scientists and engineers judge the ultimate strength, stiffness and toughness of c...
Research led by a Brown University Ph.D. student has revealed a new way to make light-absorbing perovskite films for use in solar cells.
Symmetry matters in graphene growth: Rice researchers find subtle interactions with substrate may lead to better control
What lies beneath growing islands of graphene is important to its properties, according to a new study led by Rice University.
Researchers from the University of Illinois at Urbana-Champaign have demonstrated the first-ever recording of optically encoded audio onto a non-magnetic plasmonic nanostructure, opening the door to m...