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Local surface modification at precise position using a chemical pen.

Sifeng Mao1, Yong Zhang2, Qiang Zhang1

  • 1Department of Chemistry, Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China.

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|June 2, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a novel chemical pen for precise, region-selective surface modification and patterning. This method enables online chemical reactions for fabricating protein arrays and modifying biomaterials in an open environment.

Keywords:
Analytical methodsBio-interfaceBioreactorFlow controlMicrofluidics

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Area of Science:

  • Biomaterials Science
  • Microfluidics
  • Surface Chemistry

Background:

  • Push-pull cannula systems are established for brain perfusion and region-selective surface treatment but are limited to single reagent applications.
  • Microfluidic systems offer multi-reagent treatment in closed channels, but online reactions for surface patterning in open environments remain challenging.

Purpose of the Study:

  • To develop a novel chemical pen system for region-selective online chemical reactions in open environments.
  • To enable micro-surface modification and patterning using multi-reagent strategies.
  • To demonstrate the fabrication of protein arrays and local modification of biomaterials.

Main Methods:

  • Development of a chemical pen device capable of delivering multiple reagents for simultaneous or sequential reactions.
  • Application of the chemical pen for online labeling strategies in protein array fabrication.
  • Utilizing a three-component reaction for precise, localized surface modification of biomaterials.

Main Results:

  • The chemical pen successfully enabled region-selective online chemical reactions on micro-surfaces in an open environment.
  • Demonstrated fabrication of a labeling protein array using an online labeling strategy.
  • Successfully performed local modification of biomaterial surfaces with precise spatial control.

Conclusions:

  • The developed chemical pen is the first device designed for online reactions of multiple reagents on solid samples in open environments.
  • This method provides a versatile tool for micro-surface modification and patterning, particularly for protein array fabrication with online labeling.