Ultra-high Vacuum Annealing
Ultra-high Vacuum Annealing - Related Videos
08:59
Dry Oxidation and Vacuum Annealing Treatments for Tuning the Wetting Properties of Carbon Nanotube Arrays
0 Views •
Cited by 11 •
2013
This article describes a simple method to fabricate vertically aligned carbon nanotube arrays by CVD and to subsequently tune their wetting properties by exposing them to vacuum annealing or dry oxidation treatment.
02:30
Gradient Polymerase Chain Reaction to Determine the Optimum Annealing Temperature
0 Views •
2025
This video demonstrates the gradient polymerase chain reaction for optimization of the annealing temperature of primers, which sets gradient annealing temperature along wells. The effect of different annealing temperatures is determined by the yield of amplified products that helps to optimize the reaction condition.
08:53
Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
0 Views •
Cited by 8 •
2012
The overall goal of this method is to determine the low-energy electronic structure of solids at ultra-low temperatures using Angle-Resolved Photoemission Spectroscopy with synchrotron radiation.
06:20
Proper Operation of Vacuum Based Equipment
0 Views •
2023
Source: Robert M. Rioux, Ajay Sathe & Zhifeng Chen, Pennsylvania State University, University Park, PA Vacuum is required for a number of laboratory procedures. This is most routinely achieved in the laboratory by the use of vacuum pumps. In addition to working at low pressures, vacuum pumps can also be used to enable rapid changing of the atmospheres in a reactor or flask by evacuation and backfilling.
05:28
MALDI Sample Preparation: the Ultra Thin Layer Method
0 Views •
Cited by 32 •
2007
This video demonstrates the preparation of an ultra-thin matrix/analyte layer for analyzing peptides and proteins by Matrix-Assisted Laser Desorption Ionization Mass Spectrometry (MALDI-MS).
FAQs
Heating supplies the energy needed for atoms to move through the material, allowing diffusion, recrystallization, and defect reduction. These changes can reorganize the structure and produce a more controlled surface or film morphology. The resulting atomic arrangement depends on the treatment temperature and hold time, so annealing conditions determine whether structural modification is limited or more extensive.
Ultra-low pressure reduces contact with atmospheric gases that could contaminate or oxidize the heated material. It also supports the removal of adsorbed gases and volatile species from the surface. This cleaner environment helps researchers attribute changes more confidently to thermal treatment rather than reactions with the surrounding atmosphere, which improves reproducibility in surface and materials studies.
Temperature and hold time govern how far atomic rearrangement and desorption proceed. Higher thermal exposure can promote greater diffusion, recrystallization, defect reduction, and removal of volatile species, while shorter or less intense treatment limits these effects. Because composition and morphology respond to these variables, researchers adjust them to obtain a desired surface or structural condition.
The key distinction is environmental control. Heating in ultra-low pressure limits reactive atmospheric gases, allowing thermal effects to be examined with less interference from oxidation or other environmental reactions. This separation is valuable when interpreting changes in surface chemistry, composition, or morphology, particularly in experiments where contamination could obscure the material's response to heat.
Evaluation can focus on changes in structure, surface chemistry, composition, and morphology. Removal of adsorbed gases and volatile species may alter the surface, while diffusion, recrystallization, and defect reduction can modify the material internally or at an interface. These outcomes help determine whether the treatment produced the intended surface condition, film stability, or structural adjustment.
Chemists apply this treatment when they need clean surfaces or thin films, stabilized catalysts, or modified semiconductor and nanomaterial interfaces. The resulting materials can then support surface characterization or device fabrication. Its value extends beyond preparation because the controlled environment helps distinguish intrinsic thermal changes from environmental reactions, making it useful for reproducible materials processing and interface studies.