WETTABILITY STUDIES ON FEMTOSECOND-LASER-TEXTURED N-TYPE SILICON SURFACES

Srikanth, V; Samuel, GL; Dongbin, W

WETTABILITY STUDIES ON FEMTOSECOND-LASER-TEXTURED N-TYPE SILICON SURFACES

Srikanth, V Samuel, GL Dongbin, W

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Publisher:: Institute of Metals and Technology
Publication Type:: Journal Article
Citation:: MATERIALI IN TEHNOLOGIJE, 57, (5), pp. 459-464

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Field	Value	Language
dc.contributor.author	Srikanth, V
dc.contributor.author	Samuel, GL
dc.contributor.author	Dongbin, W
dc.date.accessioned	2024-05-30T19:58:25Z
dc.date.available	2024-05-30T19:58:25Z
dc.identifier.citation	MATERIALI IN TEHNOLOGIJE, 57, (5), pp. 459-464
dc.identifier.issn	1580-2949
dc.identifier.issn	1580-3414
dc.identifier.uri	http://hdl.handle.net/10453/179348
dc.description.abstract	This present study examines the wetting behavior of N-type silicon surfaces that have been textured using a femtosecond laser. By employing three different patterns, i.e., square pillars, micro dimples, and circumferential grooves, and manipulating key femtosecond laser parameters such as laser power (ranging from 8 W to 12 W) and repetitions (ranging from 40 to 60), the wettability properties of the silicon surfaces are modified. The wettability properties of the surface were evaluated by measuring the contact angle by the sessile-drop method using distilled deionized water as a testing liquid. The textured surfaces displayed various wettability characteristics, varying from hydrophilic to hydrophobic. The hydrophobic behavior was observed on surfaces with a peak laser power of 12 W, 60 repetitions, and the lowest pitch of 160 mu m. For the square pillar and micro-dimple textures, contact angles of 146 degrees and 120 degrees, respectively, were measured. Conversely, the circumferential grooves exhibited hydrophilic behavior with a contact angle of 20 degrees. These results were achieved at laser powers of 10 W and 8 W, higher pitch values, and increased repetitions. The contact angle decreased with an increase in pitch and a decrease in repetitions and laser power. Based on the experimental findings, it can be concluded that the wettability of silicon surfaces can be controlled for specific applications using a single-step laser ablation technique. The desired wettability characteristics can be achieved by carefully adjusting the key femtosecond-laser parameters and geometrical features.
dc.language	en
dc.publisher	Institute of Metals and Technology
dc.relation.ispartof	MATERIALI IN TEHNOLOGIJE
dc.relation.isbasedon	10.17222/mit.2023.838
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0912 Materials Engineering
dc.subject.classification	4016 Materials engineering
dc.title	WETTABILITY STUDIES ON FEMTOSECOND-LASER-TEXTURED N-TYPE SILICON SURFACES
dc.type	Journal Article
utslib.citation.volume	57
utslib.for	0912 Materials Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2024-05-30T19:58:23Z
pubs.issue	5
pubs.publication-status	Published online
pubs.volume	57
utslib.citation.issue	5

Abstract:

This present study examines the wetting behavior of N-type silicon surfaces that have been textured using a femtosecond laser. By employing three different patterns, i.e., square pillars, micro dimples, and circumferential grooves, and manipulating key femtosecond laser parameters such as laser power (ranging from 8 W to 12 W) and repetitions (ranging from 40 to 60), the wettability properties of the silicon surfaces are modified. The wettability properties of the surface were evaluated by measuring the contact angle by the sessile-drop method using distilled deionized water as a testing liquid. The textured surfaces displayed various wettability characteristics, varying from hydrophilic to hydrophobic. The hydrophobic behavior was observed on surfaces with a peak laser power of 12 W, 60 repetitions, and the lowest pitch of 160 mu m. For the square pillar and micro-dimple textures, contact angles of 146 degrees and 120 degrees, respectively, were measured. Conversely, the circumferential grooves exhibited hydrophilic behavior with a contact angle of 20 degrees. These results were achieved at laser powers of 10 W and 8 W, higher pitch values, and increased repetitions. The contact angle decreased with an increase in pitch and a decrease in repetitions and laser power. Based on the experimental findings, it can be concluded that the wettability of silicon surfaces can be controlled for specific applications using a single-step laser ablation technique. The desired wettability characteristics can be achieved by carefully adjusting the key femtosecond-laser parameters and geometrical features.

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http://hdl.handle.net/10453/179348