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A general method for patterning gradients of biomolecules on surfaces using microfluidic networks.
Xingyu Jiang1, Qiaobing Xu, Stephan K W Dertinger
1Department of Chemistry and Chemical Biology, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.
Analytical Chemistry
|April 15, 2005
Summary
Researchers developed a versatile method to create surface gradients of biomolecules using microfluidics. This technique allows for precise control over gradient shapes and immobilization of diverse molecules for various applications.
Area of Science:
- Surface chemistry
- Biomaterials science
- Microfluidics
Background:
- Creating controlled surface gradients of biomolecules is crucial for studying cellular interactions and developing biosensors.
- Existing methods often lack versatility in molecule type or gradient control.
Purpose of the Study:
- To present a general and adaptable method for fabricating immobilized gradients of diverse biomolecules on surfaces.
- To demonstrate the ability to precisely control gradient shapes and dimensions.
Main Methods:
- Utilized a microfluidic network to generate solution gradients of avidin.
- Immobilized avidin onto glass or poly(dimethylsiloxane) surfaces via physical adsorption.
- Translated avidin gradients into gradients of biotinylated ligands or directly immobilized other molecules.
Main Results:
- Successfully created immobilized gradients of avidin, biotinylated ligands, proteins, and artificial polymers.
- Demonstrated control over gradient shapes through kinetic and competitive immobilization methods.
- Achieved gradient dimensions ranging from micrometers to centimeters.
Conclusions:
- The developed method offers a universal approach for creating well-defined surface gradients of nearly any molecule.
- This technique provides significant flexibility in tailoring gradient properties for advanced surface engineering and biological studies.