Title:	Fabrication of durable superhydrophilic silicon surfaces using nanosecond laser pulses
Authors:	Verma, Nancy Anoop, K K Dominic, Priya Philip, Reji
Issue Date:	Oct-2020
Publisher:	American Institute of Physics
Citation:	Journal of Applied Physics, 2020, Vol. 128, p135304
Abstract:	In this work, we report the fabrication and characterization of large area micro-/nano-textured silicon surfaces using laser pulses of nanoseconds duration. An area of 6 × 6 mm 2 has been textured by the parallel line scanning method to create hierarchical structures, consisting of microscale channels and self-organized surface nano-capillaries decorated with randomly distributed silicon nanoparticles. The combination of micro-channels and nano-capillaries results in a superhydrophilic silicon surface, with the contact angle reduced substantially from about 80 ° to nearly 5 °. In contrast to most of the reports given in the literature, the superhydrophilicity of the surface remains stable without a shift to hydrophobicity, even after exposure to the atmosphere for about three months. Thus, long-lasting and durable superhydrophilic silicon has been obtained by using maskless, compact, and cost-effective nanosecond laser writing, without the need to employ any chemical post-processing. Potential applications of these surfaces include heat exchangers, biosensors, cell adhesives, and self-cleaning solar cells.
Description:	Restricted Access
URI:	http://hdl.handle.net/2289/7571
ISSN:	0021-8979 1089-7550(Online)
Alternative Location:	https://ui.adsabs.harvard.edu/abs/2020JAP...128m5304V/abstract https://doi.org/10.1063/5.0018464
Copyright:	2020 Author(s)
Additional information:	Supplementary Information Available
Appears in Collections:	Research Papers (LAMP)

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