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Related Experiment Video

Updated: Feb 2, 2026

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
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Finely Tunable Surface Wettability by Two-Dimensional Molecular Manipulation.

Chong-You Chen1, Hsiang-Hua Li1, Hsiao-Yuan Chu1

  • 1Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan.

ACS Applied Materials & Interfaces
|November 10, 2018
PubMed
Summary
This summary is machine-generated.

Chemical lift-off lithography (CLL) precisely controls surface molecules, enabling tunable material interfaces. This technique creates patterned surfaces for advanced applications like microdroplet formation and sensitive detection.

Keywords:
chemical lift-off lithographymatrix-assisted laser desorption/ionization time-of-flight mass spectrometrymicrodropletmolecular manipulationself-assembled monolayersensingsurface modification

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Area of Science:

  • Surface Science and Engineering
  • Materials Chemistry
  • Nanotechnology

Background:

  • The local molecular environment critically dictates material interface properties and functionality.
  • Existing surface modification techniques struggle with precise control over molecular distribution and homogeneity.
  • Achieving finely tunable molecular environments on substrates remains a significant challenge.

Purpose of the Study:

  • To develop a method for manipulating substrate interface molecular environments with high spatial control.
  • To demonstrate the generation of homogeneous and tunable molecular patterns on material surfaces.
  • To showcase the application of controlled molecular environments in surface wettability adjustment and microdroplet formation.

Main Methods:

  • Utilized Au-thiolate bond rupturing within chemical lift-off lithography (CLL).
  • Created artificial self-assembled monolayer defects to introduce vacancies.
  • Back-inserted molecules with specific functionalities into defect sites for tailored surface properties.

Main Results:

  • Achieved well-controlled molecule distribution and tunable surface wettability.
  • Demonstrated the formation of microdroplet arrays from water and organic liquids due to distinct surface region properties.
  • Showcased the utility of patterned surfaces in guiding material assembly and enabling high-throughput pH-sensitive detection.
  • Minimized coffee-ring effects and sweet-spot issues in matrix-assisted laser desorption/ionization mass spectrometry.

Conclusions:

  • Two-dimensional molecular manipulation via CLL offers precise control over homogeneous material surface properties.
  • This approach enables significant adjustments in material surface behavior for diverse applications.
  • The technique provides a powerful platform for creating functional interfaces with tailored molecular arrangements.