7–11 Jul 2025
University of the Witwatersrand, Johannesburg
Africa/Johannesburg timezone

Ag-H2O nanofluids by pulsed laser liquid-solid interaction for heat removal in electronics devices

9 Jul 2025, 11:30
20m
Solomon Mahlangu House (University of the Witwatersrand, Johannesburg)

Solomon Mahlangu House

University of the Witwatersrand, Johannesburg

Oral Presentation Photonics

Speaker

Mr Snenkosi Dlamini (UNIZULU)

Description

We present Pulsed Laser Ablation in Liquid Solution (PLAL), a one-step pulsed laser ablation technique that produces a stable Ag-H2O nanofluid with improved thermal conductivity. Throughout the synthesis procedure, several deposition durations and fluences of the Nd YAG. Spherical nanoparticles (21–37 nm) having instability at higher concentrations are revealed by characterization. At 45°C (ta = 5 min), the thermal conductivity improvement is readily visible and reaches a maximum within 14–20%. In terms of the contact angle, laminar flow at the Cu interface is most likely indicated by ∆Ө<95 Deg. The impact of fluid flow is highlighted by concentration-dependent effects on the contact angle. Tube surface design emphasises design considerations via influencing flow.

Apply for student award at which level: MSc
Consent on use of personal information: Abstract Submission Yes, I ACCEPT

Primary author

Mr Snenkosi Dlamini (UNIZULU)

Co-authors

Prof. Ceboliyazakha L Ndlangamandla (UNIZULU) Dr Mahmud Akbari (UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology) Prof. Malik Maza (UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology) Prof. Mathew Moodley (UKZN) Prof. Mokhotjwa S. Dhlamini (UNISA)

Presentation materials

There are no materials yet.