Achieving Fast and Reliable TEM-Sample Lift-out and Transfer Using Novel Materials and Novel in-situ Tools

2009 ◽  
Vol 46 (5) ◽  
pp. 252-256
Author(s):  
Andreas Rummel ◽  
Gavin Frayne ◽  
Andrew Jonathan Smith ◽  
Stephan Kleindiek
Keyword(s):  
Novel Materials

scholarly journals Colloidal activated carbon and carbon-iron-novel materials for in-situ groundwater treatment

2013 ◽  
Vol 10 (1) ◽  
pp. 54-61
Keyword(s):  
Activated Carbon ◽  
Low Cost ◽  
Subsurface Water ◽  
Colloidal Solutions ◽  
Injection Wells ◽  
Novel Materials ◽  
Carbon Carrier ◽  
Carbon Particles ◽  
Contaminated Aquifers

Two novel materials have been developed and tested in initial studies for the in-situ generation of sorption and reactive barriers for subsurface water treatment at low cost by introducing sorbents or reagents via injection wells. Both materials are based on finely-ground activated carbon with a particle size of D50 = 0.8 μm which is quasi-soluble, i.e. it forms stable colloidal solutions in water over a wide concentration range. With these activated carbon colloids, an approved material of environmental technology is now applicable for injection into contaminated aquifers to form sorption barriers by controlled deposition on aquifer sediment directly in the flow passages. A new remediation strategy can be followed – the in-situ generation of a permeable AC sorption barrier in contaminated aquifers. Based on the colloidal carbon particles, a second material has been developed which combines the sorption properties of the activated carbon carrier and the reactivity of the zerovalent iron deposits. This CARBO-IRON (20 wt-% zero-valent iron) has proved its suitability as a dehalogenation reagent applicable for both plume and source treatment.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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