Wavelength-Dependent Shaping of Azopolymer Micropillars for Three-Dimensional Structure Control
Abstract
Surfaces endowed with three-dimensional (3D) mesostructures, showing features in the nanometer to micrometer range, are critical for applications in several fields of science and technology. Finding a fabrication method that is simultaneously inexpensive, simple, fast, versatile, highly scalable, and capable of producing complex 3D shapes is still a challenge. Herein, we characterize the photoreconfiguration of a micropillar array of an azobenzene-containing polymer at different light wavelengths and demonstrate the tailoring of the surface geometry and its related functionality only using light. By changing the irradiated light wavelength and its polarization, we demonstrate the fabrication of various complex isotropic and anisotropic 3D mesostructures from a single original pristine geometry. Quantitative morphological analyses revealed an interplay between the decay rate of absorbed light intensity, micropillar volume preservation, and the cohesive forces between the azopolymer chains as the origin of distinctive wavelength-dependent 3D structural remorphing. Finally, we show the potentialities of this method in surface engineering by photoreshaping a single original micropillar surface into two sets of different mesostructured surfaces exhibiting tunable hydrophobicity in a wide water contact angle range. Our study opens up a new paradigm for fabricating functional 3D mesostructures in a simple, low-cost, fast, and scalable manner.
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BibTeX
@article{januariyasa2026wavelengthdependent,
title = {{Wavelength-Dependent Shaping of Azopolymer Micropillars for Three-Dimensional Structure Control}},
author = {I Komang Januariyasa and Fabio Borbone and Marcella Salvatore and Stefano L. Oscurato},
journal = {ACS Applied Materials \& Interfaces},
year = {2026},
month = oct,
doi = {10.1021/acsami.3c09264},
url = {https://hal.science/hal-05789721v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Wavelength-Dependent Shaping of Azopolymer Micropillars for Three-Dimensional Structure Control
AU - I Komang Januariyasa
AU - Fabio Borbone
AU - Marcella Salvatore
AU - Stefano L. Oscurato
PY - 2026
DA - 2026/10/09
JO - ACS Applied Materials & Interfaces
DO - 10.1021/acsami.3c09264
UR - https://hal.science/hal-05789721v1
AB - Surfaces endowed with three-dimensional (3D) mesostructures, showing features in the nanometer to micrometer range, are critical for applications in several fields of science and technology. Finding a fabrication method that is simultaneously inexpensive, simple, fast, versatile, highly scalable, and capable of producing complex 3D shapes is still a challenge. Herein, we characterize the photoreconfiguration of a micropillar array of an azobenzene-containing polymer at different light wavelengths and demonstrate the tailoring of the surface geometry and its related functionality only using light. By changing the irradiated light wavelength and its polarization, we demonstrate the fabrication of various complex isotropic and anisotropic 3D mesostructures from a single original pristine geometry. Quantitative morphological analyses revealed an interplay between the decay rate of absorbed light intensity, micropillar volume preservation, and the cohesive forces between the azopolymer chains as the origin of distinctive wavelength-dependent 3D structural remorphing. Finally, we show the potentialities of this method in surface engineering by photoreshaping a single original micropillar surface into two sets of different mesostructured surfaces exhibiting tunable hydrophobicity in a wide water contact angle range. Our study opens up a new paradigm for fabricating functional 3D mesostructures in a simple, low-cost, fast, and scalable manner.
SN - 1944-8244
SN - 1944-8252
ER -