Sublimation Matrix Deposition
Sublimation Matrix Deposition - Related Videos
02:33
Phase Transitions: Sublimation and Deposition
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2020
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
05:39
Purification of Ferrocene by Sublimation
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University Sublimation, the direct phase transition of a solid into a gas without first becoming a liquid, takes place at temperatures and pressures lower than that of the compound's triple point (Figure 1).The process of sublimation can be utilized to purify both organic and inorganic solids. During the purification technique, a solid is heated directly into the gas-phase. All non-volatile impurities are left behind while the...
08:36
Sublimation of DAN Matrix for the Detection and Visualization of Gangliosides in Rat Brain Tissue for MALDI Imaging Mass Spectrometry
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Cited by 43 •
2017
A protocol for the sublimation of DAN matrix onto rat brain tissue for the detection of gangliosides using MALDI Imaging Mass Spectrometry is presented.
01:03
Sublimation
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2024
Sublimation is the direct transformation of a solid to a gaseous state. For instance, at standard pressure and room temperature, solid carbon dioxide sublimes to gaseous carbon dioxide. The phase diagram depicts the conditions required for sublimation. This process occurs at the solid-gas phase boundary and is not observed above the triple point of the substance. The reverse of sublimation is called deposition, where a gaseous substance condenses directly into a solid. Sublimation and...
12:21
Close-Space Sublimation-Deposited Ultra-Thin CdSeTe/CdTe Solar Cells for Enhanced Short-Circuit Current Density and Photoluminescence
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Cited by 6 •
2020
This work describes the complete fabrication process of thin absorber cadmium selenium telluride/cadmium telluride photovoltaic devices for enhanced efficiency. The process utilizes an automated in-line vacuum system for close-space sublimation deposition that is scalable, from fabrication of small area research devices as well as large-scale modules.
FAQs
Reduced pressure creates the conditions for the solid matrix to be heated until it sublimates, producing vapor that can travel toward the tissue. Because the matrix does not become a liquid during this step, deposition can form a thin, uniform coating. That coating supports subsequent laser-driven ionization while helping retain positional information.
A cooled tissue surface provides the site where matrix vapor condenses after leaving the heated solid. This condensation step is central to forming the thin, uniform layer required for MALDI mass spectrometry imaging. In brain sections, preserving that coating across the tissue supports molecular measurements that remain linked to specific anatomical locations.
Preserving spatial information allows detected molecules to be interpreted in relation to brain anatomy rather than as measurements detached from tissue location. This is important because molecular maps can show distributions across brain regions. In neuroscience, those regional patterns can contribute to studies of neural organization, disease-associated changes, and drug effects.
Preparation begins with a tissue section and a solid matrix arranged for deposition under reduced pressure. The matrix is heated, its vapor condenses on the cooled section, and the coated sample is then used for MALDI imaging. The workflow therefore connects sample coating directly to later laser-driven molecular detection.
The coated section can support detection of biomolecules including lipids, metabolites, and peptides. MALDI imaging then produces molecular maps showing where these signals occur within the tissue. Such outputs help investigators examine biochemical distributions across brain regions and connect those distributions to anatomical locations in the section.
In neuroscience, the method is useful when researchers need to relate biochemical changes to defined brain regions. The resulting molecular maps can support investigations of neural organization, disease-associated changes, and drug effects. Its value comes from combining biomolecule detection with preserved tissue position, allowing regional patterns to remain part of the experimental interpretation.