Room Temperature Fabrication of Macroporous Lignin Membranes for the Scalable Production of Black Silicon

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-06-13
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Language
en
Pages
2512–2521
Series
Biomacromolecules, Volume 23, issue 6
Abstract
Rising global demand for biodegradable materials and green sources of energy has brought attention to lignin. Herein, we report a method for manufacturing standalone lignin membranes without additives for the first time to date. We demonstrate a scalable method for macroporous (∼100 to 200 nm pores) lignin membrane production using four different organosolv lignin materials under a humid environment (>50% relative humidity) at ambient temperatures (∼20 °C). A range of different thicknesses is reported with densely porous films observed to form if the membrane thickness is below 100 nm. The fabricated membranes were readily used as a template for Ni2+ incorporation to produce a nickel oxide membrane after UV/ozone treatment. The resultant mask was etched via an inductively coupled plasma reactive ion etch process, forming a silicon membrane and as a result yielding black silicon (BSi) with a pore depth of >1 μm after 3 min with reflectance <3% in the visible light region. We anticipate that our lignin membranemethodology can be readily applied to various processes ranging from catalysis to sensing and adapted to large-scale manufacturing.
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Publisher Copyright: © 2022 The Authors. Published by American Chemical Society.
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Citation
Prochukhan , N , O'Brien , S A , Davó-Quiñonero , A , Trubetskaya , A , Cotter , E , Selkirk , A , Senthamaraikannan , R , Ruether , M , McCloskey , D & Morris , M A 2022 , ' Room Temperature Fabrication of Macroporous Lignin Membranes for the Scalable Production of Black Silicon ' , Biomacromolecules , vol. 23 , no. 6 , pp. 2512–2521 . https://doi.org/10.1021/acs.biomac.2c00228