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Related Concept Videos

Masking and Demasking Agents01:19

Masking and Demasking Agents

EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
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Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...

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Mask-Enabled Topography Contrast on Aluminum Surfaces.

Trevor J Shimokusu1,2, Hemish Thakkar1, Anam Abbas3

  • 1Department of Mechanical Engineering, Rice University, Houston, Texas 77005, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|December 16, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a scalable method using blade-cut masks to create patterned aluminum surfaces with tunable wettability and emissivity for enhanced liquid transport and thermal management applications.

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Nanotechnology

Background:

  • Patterned surfaces with wettability contrast are crucial for advanced liquid transport in electronics thermal management, self-cleaning, and anti-icing.
  • Aluminum (Al) surfaces are widely used in thermal applications, but methods for creating topography-patterned wettability contrast on Al are limited.

Purpose of the Study:

  • To demonstrate an easy and scalable method for creating topography-patterned wettability contrast on aluminum surfaces using blade-cut masking.
  • To quantify the accuracy of topographic pattern resolution, surface roughness, wettability, and thermal emissivity of the patterned Al surfaces.

Main Methods:

  • Utilized blade-cut vinyl mask templates and a commercial lacquer resin as an etch resist.
  • Employed etching processes to create topographic contrast on aluminum surfaces.
  • Characterized wettability using contact angle goniometry and thermal emissivity using infrared thermography.

Main Results:

  • Achieved wettability contrast from <5° to 80° (etched vs. smooth) and 150° to 120° (etched vs. smooth with hydrophobic coating).
  • Demonstrated enhanced droplet shedding on superhydrophobic regions of striped patterned surfaces during condensation.
  • Mapped topography-mediated thermal emissivity contrast, with etched regions at ε ≈ 0.65 and smooth regions at ε ≈ 0.26.

Conclusions:

  • The blade-cut masking method offers a scalable route to fabricate complex topography-patterned aluminum surfaces with controlled wettability and emissivity.
  • These patterned surfaces show potential for applications in vapor chamber thermal rectification, radiative cooling, and high-temperature phase change processes.