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Updated: Aug 9, 2025

Micro-masonry for 3D Additive Micromanufacturing

Micro-masonry for 3D Additive Micromanufacturing

Published on: August 1, 2014

Maskless, Reusable Visible-Light Direct-Write Stamp for Microscale Surface Patterning.

Tomas Javorskis¹, Tomas Rakickas¹, Alberta Janku Naitė²

¹Department of Nanoengineering, Center for Physical Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania.

ACS Applied Materials & Interfaces

|February 17, 2023

Summary

This study introduces a simple method for creating detailed chemical patterns on surfaces using a special stamp and light. This technique allows for cost-effective, large-area patterning without harmful byproducts.

Keywords:

HD-DVD laser catalytic lithography photoacids photolithography soft lithography surface functionalization surface patterning

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Pattern Generation for Micropattern Traction Microscopy

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Published on: February 17, 2022

Area of Science:

Materials Science
Surface Chemistry
Microfabrication

Background:

Developing efficient methods for microscale chemical patterning is crucial for advanced material applications.
Existing techniques often involve complex setups, toxic reagents, or limited scalability.

Purpose of the Study:

To present a straightforward, cost-efficient, and maskless method for creating large-area microscale chemical patterns.
To demonstrate the use of photoinduced local acidification for precise chemical modification of self-assembled monolayers.

Main Methods:

Utilizing a flat elastomeric stamp enriched with a photoacid (photoactivated merocyanine acid in poly(dimethylsiloxane) - PDMS).
Employing a simple experimental setup based on a conventional HD-DVD optical pickup for localized photoacid activation.
Achieving microscale resolution patterns by exploiting the limited diffusivity of the photoactivated acid within the PDMS stamp.

Main Results:

Successful creation of large-area patterns with microscale resolution (line widths below 10 μm) of functional amines.
Demonstration of efficient deprotection of N-tert-butyloxycarbonyl amino groups (N-Boc) via localized photoacidification.
Confirmation of a cost-efficient, maskless patterning process that avoids cytotoxic photochemical byproducts.

Conclusions:

The developed method offers a simple, scalable, and safe approach for chemical patterning.
The reversible nature and repeatable use of the stamp highlight its potential for diverse applications.
This technique provides a viable alternative for fabricating functional amine patterns on self-assembled monolayers.