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Thijs Versloot

Researchers find new phase of carbon, make diamond at room temperature - 1 views

phys.org/...-diamond-room-temperature.html

carbon science

shared by Thijs Versloot on 01 Dec 15 - No Cached
  • Thijs Versloot on 01 Dec 15
     
    Researchers from North Carolina State University have discovered a new phase of solid carbon, called Q-carbon, which is distinct from the known phases of graphite and diamond. They have also developed a technique for using Q-carbon to make diamond-related structures at room temperature and at ambient atmospheric pressure in air. It turns out this configuration is harder than diamond, plus the material has a very low work function. The latter might be very interesting for electronics or as electrode material.
  • jcunha on 02 Dec 15
     
    Maybe* this is the wonder material with very low workfunction needed in the Photon Enhanced Thermionic Emitter future prototype :)
aborgg

Carbon-rich nanorods harvest water from the air - 0 views

www.nature.com/...534298d.html

Nanoscience Fluid dynamics technology chemistry

shared by aborgg on 20 Jun 16 - No Cached
  • aborgg on 20 Jun 16
     
    Nanometre-sized rods of carbon can expel water in puffs of vapour when the air is already humid. Materials such as carbon and silica gels typically pick up moisture as humidity increases. But Satish Nune and his colleagues at the Pacific Northwest National Laboratory in Richland, Washington, found that their carbon-based nanorods take up water at low humidity and then give off about half of it when the relative humidity exceeds 50-80%. The team thinks that water condenses between adjacent rods and then capillary forces draw the rods together until the water bursts from the ends of the rods and evaporates.
santecarloni

Computer Simulation Predicts New Allotrope Of Carbon  - Technology Review - 0 views

www.technologyreview.com/...27615

carbon technology

shared by santecarloni on 01 Mar 12 - No Cached
  • santecarloni on 01 Mar 12
     
    The new material matches the properties of a puzzling new form of carbon found in high pressure experiments
Nina Nadine Ridder

Carbon dioxide pools discovered in Aegean Sea - 1 views

phys.org/...-dioxide-pools-aegean-sea.html

marine_carbon geoengineering science ESS

shared by Nina Nadine Ridder on 17 Jul 15 - No Cached
  • Nina Nadine Ridder on 17 Jul 15
     
    The location of the second largest volcanic eruption in human history, the waters off Greece's Santorini are the site of newly discovered opalescent pools forming at 250 meters depth. The interconnected series of meandering, iridescent white pools contain high concentrations of carbon dioxide (CO 2) and may hold answers to questions related to deepsea carbon storage as well as provide a means of monitoring the volcano for future eruptions.
  • Thijs Versloot on 21 Jul 15
     
    We were there last year, swimming in one of those 'healthy' mud pits..
  • LeopoldS on 21 Jul 15
     
    250m and we did not know about them ??
LeopoldS

Ministry of Science and Technology of the People's Republic of China - 0 views

www.most.gov.cn/...t20091120_74294.htm

environment ecology development china cooperation politics

shared by LeopoldS on 07 Dec 09 - Cached
  • LeopoldS on 07 Dec 09
     
    University Alliance for Low Carbon Energy   Three universities, including Tsinghua University, University of Cambridge, and the Massachusetts Institute of Technology, have fostered up an alliance on November 15, 2009 to advocate low carbon energy and climate change adaptation The alliance will mainly work on 6 major areas: clean coal technology and CCS, homebuilding energy efficiency, industrial energy efficiency and sustainable transport, biomass energy and other renewable energy, advanced nuclear energy, intelligent power grid, and energy policies/planning. A steering panel made up of the senior experts from the three universities (two from each) will be established to review, evaluate, and endorse the goals, projects, fund raising activities, and collaborations under the alliance. With the Headquarters at the campus of Tsinghua University and branch offices at other two universities, the alliance will be chaired by a scientist selected from Tsinghua University.   According to a briefing, the alliance will need a budget of USD 3-5 million, mainly from the donations of government, industry, and all walks of life. In this context, the R&D findings derived from the alliance will find its applications in improving people's life.
Nina Nadine Ridder

'This Planet Tastes Funny,' According to Spitzer - 2 views

www.physorg.com/news191080885.html

exoplanets spectra GJ436b Spitzer

shared by Nina Nadine Ridder on 22 Apr 10 - Cached
  • Nina Nadine Ridder on 22 Apr 10
     
    Spectra of the atmosphere of the planet GJ436b in the constellation Loe show evidence for carbon monoxide. Theoretical studies using numerical models however predicted that this planet's carbon inventory should be stored in the form of methane rather than CO as its temperature is estimated to be 800K. Where this inaccuracy of atmospheric models comes from is not known and has to be investigated further.
Friederike Sontag

Aerosols make methane more potent - 1 views

www.nature.com/...news.2009.1049.html

air_pollution methane VOCs climate_change

shared by Friederike Sontag on 03 Nov 09 - No Cached
LeopoldS liked it
  • Friederike Sontag on 03 Nov 09
     
    "climate policy-makers need to pay much more attention to restricting short-lived pollutants, such as methane, carbon monoxide, volatile organic compounds (VOCs) and aerosols. This could create significant changes in the local and global climate quite quickly, whereas the effects of efforts to reduce emissions of long-lived carbon dioxide will not be seen for many years."
  • LeopoldS on 04 Nov 09
     
    interesting indeed ... but coming at the right time before copenhagn?
  • Friederike Sontag on 04 Nov 09
     
    These conclusions come too late to have a real impact on decisions that will be taken in Copenhagen, I assume. But I think it is a hot topic as climate change 'solutions' that work QUICKLY are more and more needed!!
Thijs Versloot

Carbon nanotubes grow in combustion flames - 0 views

www.itbm.nagoya-u.ac.jp/...-grow-in-combustion-flames.php

CNT nano

shared by Thijs Versloot on 02 Apr 14 - No Cached
  • Thijs Versloot on 02 Apr 14
     
    Quantum chemical simulations reveal an unprecedented relationship between the mechanism of carbon nanotube growth and hydrocarbon combustion processes. Results of these simulations illustrate the importance in the role of carbon chemical bonding and molecular transformations in CNT growth.
johannessimon81

Wood pulp extract stronger than carbon fiber or Kevlar - 0 views

www.gizmag.com/...23959

bio technology phy science

shared by johannessimon81 on 23 Oct 12 - No Cached
  • johannessimon81 on 23 Oct 12
     
    The Forest Products Laboratory of the US Forest Service has opened a US$1.7 million pilot plant for the production of cellulose nanocrystals (CNC) from wood by-products materials such as wood chips and sawdust. Prepared properly, CNCs are stronger and stiffer than Kevlar or carbon fibers, so that putting CNC into composite materials results in high strength, low weight products.
johannessimon81

New Form of Carbon is Stronger Than Graphene and Diamond - 0 views

www.technologyreview.com/...nger-than-graphene-and-diamond

science technology

shared by johannessimon81 on 23 Aug 13 - No Cached
  • johannessimon81 on 23 Aug 13
     
    "Chemists have calculated that chains of double or triple-bonded carbon atoms, known as carbyne, should be stronger and stiffer than any known material."
Luís F. Simões

Shell energy scenarios to 2050 - 6 views

www.shell.com/...shell_energy_scenarios_2050

energy future forecast politics economy climate_change

shared by Luís F. Simões on 09 Mar 11 - No Cached
  • Luís F. Simões on 09 Mar 11
     
    just in case you were feeling happy and optimistic
  • ...7 more comments...
  • Francesco Biscani on 09 Mar 11
     
    An energy scenario published by an oil company? Allow me to be sceptical...
  • Joris _ on 10 Mar 11
     
    Indeed, Shell is an energy company, not just oil, for some time now ... The two scenarii are, in their approach, dependant of economic and political situation, which is right now impossible to forecast. Reference to Kyoto is surprising, almost out-dated! But overall, I find it rather optimistic at some stages, and probably the timeline (p37-39) is unlikely with recent events.
  • Luís F. Simões on 10 Mar 11
     
    the report was published in 2008, which explains the reference to Kyoto, as the follow-up to it was much more uncertain at that point. The Blueprint scenario is indeed optimistic, but also quite unlikely I'd say. I don't see humanity suddenly becoming so wise and coordinated. Sadly, I see something closer to the Scramble scenario as much more likely to occur.
  • LeopoldS on 12 Mar 11
     
    not an oil company??? please have a look at the percentage of their revenues coming from oil and gas and then compare this with all their other energy activities together and you will see very quickly that it is only window dressing ... they are an oil and gas company ... and nothing more
  • Joris _ on 14 Mar 11
     
    not JUST oil. From a description: "Shell is a global group of energy and petrochemical companies." Of course revenues coming from oil are the biggest, the investment turnover on other energy sources is small for now. Knowing that most of their revenues is from an expendable source, to guarantee their future, they invest elsewhere. They have invested >1b$ in renewable energy, including biofuels. They had the largest wind power business among so-called "oil" companies. Oil only defines what they do "best". As a comparison, some time ago, Apple were selling only computers and now they sell phones. But I would not say Apple is just a phone company.
  • LeopoldS on 14 Mar 11
     
    window dressing only ... e.g. Net cash from operating activities (pre-tax) in 2008: 70 Billion$ net income in 2008: 26 Billion revenues in 2008: 88 Billion Their investments and revenues in renewables don't even show up in their annual financial reports since probably they are under the heading of "marketing" which is already 1.7 Billion $ ... this is what they report on their investments: Capital investment, portfolio actions and business development Capital investment in 2009 was $24 billion. This represents a 26% decrease from 2008, which included over $8 billion in acquisitions, primarily relating to Duvernay Oil Corp. Capital investment included exploration expenditure of $4.5 billion (2008: $11.0 billion). In Abu Dhabi, Shell signed an agreement with Abu Dhabi National Oil Company to extend the GASCO joint venture for a further 20 years. In Australia, Shell and its partners took the final investment decision (FID) for the Gorgon LNG project (Shell share 25%). Gorgon will supply global gas markets to at least 2050, with a capacity of 15 million tonnes (100% basis) of LNG per year and a major carbon capture and storage scheme. Shell has announced a front-end engineering and design study for a floating LNG (FLNG) project, with the potential to deploy these facilities at the Prelude offshore gas discovery in Australia (Shell share 100%). In Australia, Shell confirmed that it has accepted Woodside Petroleum Ltd.'s entitlement offer of new shares at a total cost of $0.8 billion, maintaining its 34.27% share in the company; $0.4 billion was paid in 2009 with the remainder paid in 2010. In Bolivia and Brazil, Shell sold its share in a gas pipeline and in a thermoelectric power plant and its related assets for a total of around $100 million. In Canada, the Government of Alberta and the national government jointly announced their intent to contribute $0.8 billion of funding towards the Quest carbon capture and sequestration project. Quest, which is at the f
  • Joris _ on 14 Mar 11
     
    thanks for the info :) They still have their 50% share in the wind farm in Noordzee (you can see it from ESTEC on a clear day). Look for Shell International Renewables, other subsidiaries and joint-ventures. I guess, the report is about the oil branch. http://sustainabilityreport.shell.com/2009/servicepages/downloads/files/all_shell_sr09.pdf http://www.noordzeewind.nl/
  • LeopoldS on 16 Mar 11
     
    no - its about Shell globally - all Shell .. these participations are just peanuts please read the intro of the CEO in the pdf you linked to: he does not even mention renewables! their entire sustainability strategy is about oil and gas - just making it (look) nicer and environmentally friendlier
  • Joris _ on 16 Mar 11
     
    Fair enough, for me even peanuts are worthy and I am not able to judge. Not all big-profit companies, like Shell, are evil :( Look in the pdf what is in the upstream and downstream you mentionned above. Non-shell sources for examples and more objectivity: http://www.nuon.com/company/Innovative-projects/noordzeewind.jsp http://www.e-energymarket.com/news/single-news/article/ferrari-tops-bahrain-gp-using-shell-biofuel.html thanks.
nikolas smyrlakis

BBC NEWS | Science & Environment | 'Artificial trees' to cut carbon - 0 views

news.bbc.co.uk/...8223528.stm

environment climate change

shared by nikolas smyrlakis on 27 Aug 09 - Cached
  • nikolas smyrlakis on 04 Sep 09
     
    Engineers launch a plan to start removing carbon dioxide from the atmosphere within 10 to 20 years.
dejanpetkow

Torsional Carbon Nanotube Artificial Muscles - 0 views

www.sciencemag.org/...science.1211220

BIO NAN carbon muscles

shared by dejanpetkow on 18 Oct 11 - No Cached
  • Actuator materials producing rotation are rare and demonstrated rotations are small, though rotary systems like electric motors, pumps, turbines and compressors are widely needed and utilized. Present motors can be rather complex and, therefore, difficult to miniaturize. We show that a short electrolyte-filled twist spun carbon nanotube yarn, which is much thinner than a human hair, functions as a torsional artificial muscle in a simple three-electrode electrochemical system, providing a reversible 15,000° rotation and 590 revolutions/minute. A hydrostatic actuation mechanism, like for nature’s muscular hydrostats, explains the simultaneous occurrence of lengthwise contraction and torsional rotation during the yarn volume increase caused by electrochemical double-layer charge injection. Use of a torsional yarn muscle as a mixer for a fluidic chip is demonstrated.
  • dejanpetkow on 18 Oct 11
     
    I have no access to the pdf, but abstract sounds interesting.
Thijs Versloot

Synthesis of Carbon Nanofibres direct from CO2 atmosphere - 9 views

pubs.acs.org/...acs.nanolett.5b02427

technology materials carbon CO2 Mars

shared by Thijs Versloot on 20 Aug 15 - No Cached
LeopoldS and Paul N liked it
  • Thijs Versloot on 20 Aug 15
     
    It may be feasible to use this in the Marsian atmosphere (9mbar CO2) to directly grow Carbon Nanofibres for infrastructural needs
  • ...1 more comment...
  • aborgg on 21 Aug 15
     
    This is clearly interesting for the new YGT on Space Architecture (with background on fabrics) that comes in October. Since I was asked to provide input here, this could be a solid ground to start with. Thanks. :)
  • LeopoldS on 07 Oct 15
     
    nice!
  • aborgg on 09 Oct 15
     
    gave it to Hanna, she is looking into it now. Manchester and Ghent University could be potential collaborators.
santecarloni

Room Temperature Superconductivity Found in Graphite Grains - Technology Review - 1 views

www.technologyreview.com/...ure-superconductivity-found-in

technology PHY

shared by santecarloni on 13 Sep 12 - No Cached
  • santecarloni on 13 Sep 12
     
    Water-soaked grains of carbon superconduct at room temperature, claim a team of physicists from Germany
santecarloni

Nanotube bundles could boost solar cells - physicsworld.com - 0 views

physicsworld.com/...48311

Space technology

shared by santecarloni on 20 Jan 12 - No Cached
  • santecarloni on 20 Jan 12
     
    Thin-film solar cells could be made far more efficient with the addition of bundles of carbon nanotubes.
  • LeopoldS on 20 Jan 12
     
    Lionel could you have a closer look at this one?
Tom Gheysens

Biomimicr-E: Nature-Inspired Energy Systems | AAAS - 4 views

www.aaaspolicyfellowships.org/...nature-inspired-energy-systems

energy science phy space

shared by Tom Gheysens on 13 Jan 14 - No Cached
  • Tom Gheysens on 13 Jan 14
     
    some biomimicry used in energy systems... maybe it sparks some ideas
  • LeopoldS on 27 Jan 14
     
    not much new that has not been shared here before ... BUT: we have done relativley little on any of them. for good reasons?? don't know - maybe time to look into some of these again more closely Energy Efficiency( Termite mounds inspired regulated airflow for temperature control of large structures, preventing wasteful air conditioning and saving 10% energy.[1] Whale fins shapes informed the design of new-age wind turbine blades, with bumps/tubercles reducing drag by 30% and boosting power by 20%.[2][3][4] Stingray motion has motivated studies on this type of low-effort flapping glide, which takes advantage of the leading edge vortex, for new-age underwater robots and submarines.[5][6] Studies of microstructures found on shark skin that decrease drag and prevent accumulation of algae, barnacles, and mussels attached to their body have led to "anti-biofouling" technologies meant to address the 15% of marine vessel fuel use due to drag.[7][8][9][10] Energy Generation( Passive heliotropism exhibited by sunflowers has inspired research on a liquid crystalline elastomer and carbon nanotube system that improves the efficiency of solar panels by 10%, without using GPS and active repositioning panels to track the sun.[11][12][13] Mimicking the fluid dynamics principles utilized by schools of fish could help to optimize the arrangement of individual wind turbines in wind farms.[14] The nanoscale anti-reflection structures found on certain butterfly wings has led to a model to effectively harness solar energy.[15][16][17] Energy Storage( Inspired by the sunlight-to-energy conversion in plants, researchers are utilizing a protein in spinach to create a sort of photovoltaic cell that generates hydrogen from water (i.e. hydrogen fuel cell).[18][19] Utilizing a property of genetically-engineered viruses, specifically their ability to recognize and bind to certain materials (carbon nanotubes in this case), researchers have developed virus-based "scaffolds" that
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