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Articles 1 - 10 of 10
Full-Text Articles in Social and Behavioral Sciences
Extrusion Printing Conducting Gel-Carbon Nanotube Structures Upon Flexible Substrates, Geoffrey Pidcock, Marc In Het Panhuis
Extrusion Printing Conducting Gel-Carbon Nanotube Structures Upon Flexible Substrates, Geoffrey Pidcock, Marc In Het Panhuis
Faculty of Science - Papers (Archive)
Extrusion printing was investigatedas a wet-processing method forfabrication of robust, flexible conductingstructures. Layer resistance values of 7 -8 kO/cm were obtained for one printedlayer on flexible substrates. Increasingthe number of extrusion printed layer significantlyimproved resistance.
Diffusion Of Vitamin B12 In Gellan Gum-Carbon Nanotube Hydrogels, Cameron Ferris, Marc In Het Panhuis
Diffusion Of Vitamin B12 In Gellan Gum-Carbon Nanotube Hydrogels, Cameron Ferris, Marc In Het Panhuis
Faculty of Science - Papers (Archive)
We report on the diffusion of vitamin B12 through gellan gum-carbon nanotube hydrogels. The addition of carbon nanotubes to gellan gum reduced the vitamin B12 diffusion coefficient from 1.70 x 10-6 cm2/s to 0.70 x 10-6 cm2/s.
Source Attribution And Interannual Variability Of Arctic Pollution In Spring Constrained By Aircraft (Arctas, Arcpac) And Satellite (Airs) Observations Of Carbon Monoxide, J A. Fisher, D J. Jacob, M T. Purdy, M Kopacz, P Le Sager, C C. Carouge, C D. Holmes, R M. Yantosca, R L. Batchelor, K Strong, G S. Diskin, H E. Fuelberg, J S. Holloway, E J. Hyer, W. W Mcmillan, J Warner, D G. Streets, Q Zhang, Y Yang, S Wu
Source Attribution And Interannual Variability Of Arctic Pollution In Spring Constrained By Aircraft (Arctas, Arcpac) And Satellite (Airs) Observations Of Carbon Monoxide, J A. Fisher, D J. Jacob, M T. Purdy, M Kopacz, P Le Sager, C C. Carouge, C D. Holmes, R M. Yantosca, R L. Batchelor, K Strong, G S. Diskin, H E. Fuelberg, J S. Holloway, E J. Hyer, W. W Mcmillan, J Warner, D G. Streets, Q Zhang, Y Yang, S Wu
Faculty of Science - Papers (Archive)
We use aircraft observations of carbon monoxide (CO) from the NASA ARCTAS and NOAA ARCPAC campaigns in April 2008 together with multiyear (2003– 2008) CO satellite data from the AIRS instrument and a global chemical transport model (GEOS-Chem) to better understand the sources, transport, and interannual variability of pollution in the Arctic in spring. Model simulation of the aircraft data gives best estimates of CO emissions in April 2008 of 26 Tg month−1 for Asian anthropogenic, 9.4 for European anthropogenic, 4.1 for North American anthropogenic, 15 for Russian biomass burning (anomalously large that year), and 23 for Southeast Asian biomass …
Carbon Nanotube Architectures As Catalyst Supports For Proton Exchange Membrane Fuel Cells, Weimin Zhang, Peter Sherrell, Andrew I. Minett, Joselito M. Razal, Jun Chen
Carbon Nanotube Architectures As Catalyst Supports For Proton Exchange Membrane Fuel Cells, Weimin Zhang, Peter Sherrell, Andrew I. Minett, Joselito M. Razal, Jun Chen
Faculty of Science - Papers (Archive)
Catalyst support materials exhibit great influence on the performance and durability of proton exchange membrane (PEM) fuel cells. This minireview article summarises recent developments into carbon nanotube-based support materials for PEM fuel cells, including the membrane electrode assembly (MEA). The advantages of using CNTs to promote catalyst performance and stability, a perspective on research directions and strategies to improve fuel cell performance and durability are discussed. It is hoped that this mini-review will act as a conduit for future developments in catalyst supports and MEA design for PEM fuel cells.
Nanostructured Carbon Electrodes, Gordon G. Wallace, Jun Chen, Dan Li, Simon E. Moulton, Joselito M. Razal
Nanostructured Carbon Electrodes, Gordon G. Wallace, Jun Chen, Dan Li, Simon E. Moulton, Joselito M. Razal
Faculty of Science - Papers (Archive)
In its conducting form, carbon has proven to be a versatile, robust and high performing electrode material in areas such as energy conversion, energy storage and even medical bionics. In our laboratories we have been interested in the fabrication and utilization of nanostructured electrodes based on more recently discovered forms of carbon. These include carbon nanotubes and graphene.
Gel-Carbon Nanotube Materials: The Relationship Between Nanotube Network Connectivity And Conductivity, Naratip Songmee, Pisith Singjai, Marc In Het Panhuis
Gel-Carbon Nanotube Materials: The Relationship Between Nanotube Network Connectivity And Conductivity, Naratip Songmee, Pisith Singjai, Marc In Het Panhuis
Faculty of Science - Papers (Archive)
The electrical resistance of carbon nanotube networks (NNs) prepared from combinations of gellan gum, xanthan gum, Triton X-100, SWNT and MWNT is reported. It is demonstrated that the NN conductivity can be obtained by analysing the resistance of two overlapping NN as a function of their overlap distance. Unexpectedly, the connectivity between two overlapping NN was found to scale with the electrical conductivity over 4 orders of magnitude. Insights into the dependence of inter-NN contact on applied pressure were obtained.
Inkjet Printed Conducting Gel-Carbon Nanotube Materials, A Aldalbahi, Marc In Het Panhuis
Inkjet Printed Conducting Gel-Carbon Nanotube Materials, A Aldalbahi, Marc In Het Panhuis
Faculty of Science - Papers (Archive)
The inkjet printing of CNTbiopolymer composite inks onto solid and gel substrates was investigated. Changing the substrate from glass to gel resulted in an increase in the resistance of printed materials from 9.85 kΩ/cm to 39.42 kΩ/cm.
Preliminary Validation Of Column-Averaged Volume Mixing Ratios Of Carbon Dioxide And Methane Retrieved From Gosat Short-Wavelength Infrared Spectra, I Morino, O Uchino, M Inoue, Y Yoshida, T Yokota, P Wennberg, G C Toon, Debra Wunch, C M. Roehl, J Notholt, T Warneke, Janina Messerschmidt, David W. Griffith, Nicholas M. Deutscher, V Sherlock, B Connor, J Robinson, R Sussmann, M Rettinger
Preliminary Validation Of Column-Averaged Volume Mixing Ratios Of Carbon Dioxide And Methane Retrieved From Gosat Short-Wavelength Infrared Spectra, I Morino, O Uchino, M Inoue, Y Yoshida, T Yokota, P Wennberg, G C Toon, Debra Wunch, C M. Roehl, J Notholt, T Warneke, Janina Messerschmidt, David W. Griffith, Nicholas M. Deutscher, V Sherlock, B Connor, J Robinson, R Sussmann, M Rettinger
Faculty of Science - Papers (Archive)
Column-averaged volume mixing ratios of carbon dioxide and methane retrieved from the Greenhouse gases Observing SATellite (GOSAT) Short-Wavelength InfraRed observation (GOSAT SWIR XCO2 and XCH4) were compared with the reference data ob- 5 tained by ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) participating in the Total Carbon Column Observing Network (TCCON). Through calibrations of g-b FTSs with airborne in-situ measurements, the uncertainty of XCO2 and XCH4 associated with the g-b FTS was determined to be 0.8 ppm (0.2%) and 4 ppb (0.2%), respectively. The GOSAT products are validated with 10 these calibrated g-b FTS data. Preliminary results are as follows: …
Calibration Of The Total Carbon Column Observing Network Using Aircraft Profile Data, Debra Wunch, G C Toon, Paul O. Wennberg, Steven C. Wofsy, Robert S. Stephens, M K.R. Fischer, O Uchino, J Abshire, P Bernath, S C Biraud, J-F Blavier, C Boone, K P. Bowman, E V. Browell, T Campos, B Connor, Bruce C. Daube, Nicholas M. Deutscher, M Diao, J W. Elkins, Christoph Gerbig, E Gottlieb, David W. Griffith, D F. Hurst, Rodrigo Jimenez, Gretchen Keppel-Aleks, E A. Kort, Ronald Macatangay, T Machidda, H Matsueda, F Moore, I Morino, S Park, J Robinson, C M. Roehl, Y Sawa, V Sherlock, C Sweeney, T Tanaka, M A. Zondlo
Calibration Of The Total Carbon Column Observing Network Using Aircraft Profile Data, Debra Wunch, G C Toon, Paul O. Wennberg, Steven C. Wofsy, Robert S. Stephens, M K.R. Fischer, O Uchino, J Abshire, P Bernath, S C Biraud, J-F Blavier, C Boone, K P. Bowman, E V. Browell, T Campos, B Connor, Bruce C. Daube, Nicholas M. Deutscher, M Diao, J W. Elkins, Christoph Gerbig, E Gottlieb, David W. Griffith, D F. Hurst, Rodrigo Jimenez, Gretchen Keppel-Aleks, E A. Kort, Ronald Macatangay, T Machidda, H Matsueda, F Moore, I Morino, S Park, J Robinson, C M. Roehl, Y Sawa, V Sherlock, C Sweeney, T Tanaka, M A. Zondlo
Faculty of Science - Papers (Archive)
The Total Carbon Column Observing Network (TCCON) produces precise measurements of the column average dry-air mole fractions of CO2, CO, CH4, N2O and H2O at a variety of sites worldwide. These observations rely on spectroscopic parameters that are not known with sufficient accuracy to compute total columns that can be used in combination with in situ measurements. The TCCON must therefore be calibrated to World Meteorological Orga-nization (WMO) in situ trace gas measurement scales. We present a calibration of TCCON data using WMO-scale instrumentation aboard aircraft that measured profiles over four TCCON stations during 2008 and 2009. These calibrations are …
Linking Measured Carbon Dioxide Exchange By Sugarcane Crops And Biomass Production, O T Denmead, B.C.T. Macdonald, I. White, David W. Griffith, G Bryant, Travis A. Naylor, Stephen R. Wilson, W J. Wang
Linking Measured Carbon Dioxide Exchange By Sugarcane Crops And Biomass Production, O T Denmead, B.C.T. Macdonald, I. White, David W. Griffith, G Bryant, Travis A. Naylor, Stephen R. Wilson, W J. Wang
Faculty of Science - Papers (Archive)
CARBON TRADING and the growing interest in biofuel production from sugarcane necessitate the ability to measure gains and losses of soil organic C which may occur as a result. Modelling and soil sampling suggest that changes in soil C are likely to be < 1 t C/ha/y. Published accounts indicate that confirming such small changes by traditional soil sampling is error-prone and requires investigations of > 10 years. The paper explores the possibility of calculating soil gains or losses by subtracting the carbon stored in the crop biomass from the carbon gained by the crop through the uptake of carbon dioxide supplied by the atmosphere and processes in the soil. Although uptake and storage very nearly balanced each other in one–year measurements in …