What is inert gas condensation method?
The technique of inert-gas condensation (IGC) consists of evaporating, sputtering or ablating a material inside a chamber that is evacuated to a vacuum pressure of about 10-8 mbar and then back-filled with a low-pressure inert gas like helium. The inert gas condensation method produces equiaxed crystallites.
Is inert gas condensation a top down approach?
As mentioned earlier, two of the methods of the preparation of metallic nanoparticle using the bottom-up approach are discussed: Inert Gas Condensation and Pyrolysis. The first and easiest of the methods for the preparation of the metallic nanoparticles and nanocomposites is Inert Gas Condensation.
What is gas phase method?
Gas-phase synthesis characterizes a class of bottom-up methods for producing multifunctional nanoparticles (NPs) from individual atoms or molecules. Nanoparticle synthesis is decomposed into four stages, i.e. aggregation, shell-coating, mass-filtration, and deposition.
What is gas phase condensation?
The method consists of the evaporation of the material into an inert gas atmosphere so that through inter-atomic collisions with the inert gas atoms, the evaporated atoms lose kinetic energy and condense in the form of small crystals a few nanometers across.
What are the advantages of inert gas?
Advantages are:
- Inert gas in cargo tank make atmosphere non-explosive.
- It allows high-pressure tank washing and reduces tank-cleaning time.
- It allows COW( crude oil washing)
- Reduces corrosion in tanks – with an efficient scrubber in the system.
- Improves stripping efficiency and reduces discharge time.
What does inert mean?
1 : lacking the power to move. 2 : very slow to move or act : sluggish. 3 : deficient in active properties especially : lacking a usual or anticipated chemical or biological action.
What are the advantages of the gas phase synthesis?
Introduction. Gas-phase synthesis is a promising method for the green and economic design of nanoparticles as building blocks for targeted nanotechnology applications, which has attracted increasing interest due to its versatility and liberating independence from chemical precursors and surfactants.
What is Vapour phase synthesis?
In vapor-phase synthesis of nanoparticles, conditions are created where the vapor phase mixture is thermodynamically unstable relative to formation of the solid material to be prepared in nanoparticulate form. This includes usual situation of a supersaturated vapor.
How does hydrothermal synthesis work?
Hydrothermal synthesis can be defined as a method of synthesis of single crystals that depends on the solubility of minerals in hot water under high pressure. At the hotter end the nutrient solute dissolves, while at the cooler end it is deposited on a seed crystal, growing the desired crystal.
What are the disadvantages of inert gas?
Disadvantages are :
- Additional costs for installation.
- Additional Maintenance require manpower and money.
- Low visibility inside tanks.
- With low oxygen content, tank access is denied.
- Could lead to contamination of high-grade products.
- Moisture and sulphur content corrodes equipment.