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Functional Surface-immobilization of Genes Using Multistep Strand Displacement Lithography

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Published on: October 25, 2018

Structuration of pH-responsive fluorescent molecules on surfaces by soft lithographic techniques.

Alberto Martínez-Otero¹, Félix Busqué, Jordi Hernando

¹Centro de Investigación en Nanociencia y Nanotecnología (CIN2, CSIC-ICN), Esfera UAB, Cerdanyola del Vallès, Spain.

|September 8, 2010

Summary

Researchers created fluorescent sensor arrays using soft lithography. These arrays detect pH changes across a wide range, utilizing pH-responsive molecules like fluorescein.

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Area of Science:

Materials Science
Chemical Engineering
Analytical Chemistry

Background:

Soft lithography offers precise surface patterning capabilities.
Fluorescent molecules can act as sensitive indicators for chemical environments.
pH-responsive materials are crucial for various sensing applications.

Purpose of the Study:

To develop fluorescent arrays for pH sensing using soft lithography.
To investigate the pH-responsive properties of fluorescein and a novel catechol derivative.
To demonstrate the fabrication of arrays responding over a broad pH range.

Main Methods:

Utilized two soft lithography techniques: laser-induced forward transfer (LCW) and microcontact printing (microCP).
Functionalized surfaces with fluorescein and a new catechol derivative.
Characterized the emission properties of the molecules across a wide pH spectrum.

Main Results:

Successfully patterned pH-responsive fluorescent molecules on surfaces.
Demonstrated distinct emission changes for fluorescein and the catechol derivative with varying pH.
Fabricated arrays capable of indicating pH changes over a broad operational window.

Conclusions:

Soft lithography is effective for creating fluorescent pH-responsive sensor arrays.
The chosen molecules provide reliable fluorescence-based pH sensing.
The developed arrays show potential for applications requiring wide-range pH monitoring.