Our research group has constructed a nanoparticle deposition system that utilizes inert gas condensation (IGC) and dc magnetron sputtering to produce multi-elemental nanoparticles with monodispersed distributions over a size range of nanometers to tens of nanometers. The system utilizes composite targets with second (or third) elements as plugs around the "racetrack" of standard dc magnetron sputtering, which allows for accurate composition control. Additionally, the system contains an RF gun for thin film deposition, which can be used to create imbedded nanoparticles or composite systems or to provide oxidation resistance. The nanoparticles are deposited onto carbon support films for electron microscopy observation or onto substrates for other characterization techniques.
2. Melt spinner user manual
Melt spinning is a method for producing thin ribbons of metal or alloys with specific atomic structures. The process involves casting the molten metal onto a rotating wheel or drum that is cooled internally with water or liquid nitrogen. As the molten material comes into contact with the drum's cold surface, it rapidly solidifies. The rotation of the drum removes the solidified product and exposes the new surface area to the molten metal stream, allowing for continuous production. The resulting ribbons can be used in a variety of applications such as in high-efficiency transformers, sensory devices, telecommunications equipment, power electronics, and also in developing materials with extremely high cooling rates for solidification, such as metallic glasses.
The basic principle of arc melter is similar to an arc-welding machine, where an electrical current is arced between two contacts to produce heat. The high-energy arc generates temperatures that can reach up to 7,000 degrees Celsius. The electrode shaft, which is usually made of graphite, is directed towards the center of the copper surface, which is water-cooled to prevent overheating. The copper surface acts as a crucible and the electrode is used to melt the samples. The sample is then poured into a mold for solidification. Arc melters are often used in laboratories for the research and development of new materials, and for small-scale production of high-purity metals and alloys.
4. Desiccators
Vacuum desiccators are laboratory equipment used to store samples that are sensitive to moisture, such as powders, crystals, and TEM (transmission electron microscopy) samples. They are designed to protect these samples from humidity and dust, which can cause damage or degrade the samples over time. The desiccator typically consists of two parts: a clear, sealed container and a removable desiccant (a substance that absorbs moisture) tray. The container is evacuated to create a vacuum, which reduces the amount of moisture present inside. The desiccant tray is placed in the container and absorbs any remaining moisture. The samples are then placed on top of the desiccant tray and the container is sealed. The vacuum inside the container, combined with the desiccant tray, creates a dry, dust-free environment that helps to preserve the samples.
5. Other Facilities:
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Automatic Polishing Machine |
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All Facilities are in use by SAMPL: 1. ELECTRON NANOSCOPY INSTRUMENTATION FACILITY 2. X-RAY STRUCTURAL CHARACTERIZATION FACILITY
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Ultrasonic cleaner |
