Graham Jon Kaufman

• University of Nebraska–Lincoln

Condensation, a ubiquitous phenomenon with applications ranging from power generation to climate control in buildings, features a complex interplay of surface properties, heat transfer and fluid dynamics. In recent years, Ultra-short Pulsed Laser Surface Processing (ULSP) has emerged as a powerful tool to engineer surface structures with unparallel...

In the ever-evolving landscape of modern high-power electronics, efficient thermal management solutions play a pivotal role in determining device performance and longevity. Vapor chambers have long been heralded as effective tools for managing high heat-flux scenarios. Traditionally, vapor chambers are wick-lined; however, they have some inherent l...

Copper substrates were functionalized with micro- and nano-scale features by ultrashort pulsed laser surface processing to enhance the electrocatalytic nature for the electrochemical reduction of carbon dioxide. Post-processing of the laser-functionalized copper surfaces was carried out to increase the stability of the electrocatalyst and alter the...

The contact angle and surface chemistry of femtosecond laser processed silver evolves at an accelerated rate compared to other metals. The transient state of the surface chemistry after laser processing is analyzed with electron spectroscopy.

Changes in surface chemistry and wettability of femtosecond laser surface processed (FLSP) copper due to atmospheric exposure are quantified using X-ray photoelectron spectroscopy and contact angle measurements.

In this study, a vapor chamber-thermal diode apparatus is fabricated and tested. The system's components are laser-functionalized, wickless, and wettability-patterned copper plates. This is the first thermal management component that is completely wick-free and operates due to surface modification and wettability patterning instead of utilizing wic...