Contact Angle Measurements for Advanced Thermal Management Technologies

Taft, Brenton; Smith, Sally M.; Moulton, Jacob

doi:10.5098/hmt.5.6

Cited by 9 publications

(2 citation statements)

References 39 publications

(49 reference statements)

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“…Compared to the flat surface, the etched sample, on average, demonstrated lower values, meaning that the advancing and receding WCA were more alike, which led to improved balancing of tensions at the liquid–solid interfaces. It has previously been shown that a lower hysteresis also permits improved heat transfer, with further reports highlighting that the critical heat flux is reduced when the contact angle hysteresis increases . Moreover, lower CA values have been found to decrease the boiling heat efficiency in thermal systems .…”

Section: Resultsmentioning

confidence: 96%

High Aspect Ratio Nanoscale Pores through BCP-Based Metal Oxide Masks and Advanced Dry Etching

Esmeraldo Paiva,

Gerlt,

Läubli

et al. 2023

ACS Appl. Mater. Interfaces

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The reliable and regular modification of the surface properties of substrates plays a crucial role in material research and the development of functional surfaces. A key aspect of this is the development of the surface pores and topographies. These can confer specific advantages such as high surface area as well as specific functions such as hydrophobic properties. Here, we introduce a combination of nanoscale self-assembled block-copolymer-based metal oxide masks with optimized deep reactive ion etching (DRIE) of silicon to permit the fabrication of porous topographies with aspect ratios of up to 50. Following the evaluation of our procedure and involved parameters using various techniques, such as AFM or SEM, the suitability of our features for applications relying on high light absorption as well as efficient thermal management is explored and discussed in further detail.

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Section: Resultsmentioning

confidence: 96%

High Aspect Ratio Nanoscale Pores through BCP-Based Metal Oxide Masks and Advanced Dry Etching

Esmeraldo Paiva,

Gerlt,

Läubli

et al. 2023

ACS Appl. Mater. Interfaces

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“…To measure the apparent dynamic contact angle, a θ , a sessile drop experiment is conducted. In the general method, a liquid drop is placed on a plate and the plate is tilted [16]. However, for more accurate measurement, the contact angle is measured at the moment the contact line moves as a thin tip providing droplets adds liquid volume [17].…”

Section: Sessile Drop Methodsmentioning

confidence: 99%

Fabrication of an oil–water separation copper filter using laser beam machining

Chu

2016

J. Micromech. Microeng.

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In this study, oil and water are successfully separated using a copper filter that is fabricated using only laser beam machining. Even though copper is hydrophilic and recast copper material, which inevitably results during laser beam machining, is super-hydrophilic, the filter can prevent the water from penetrating and allow oil to flow based on surface tension of the liquids at the hole exit. For practical uses of the filter, both the pressure differences at which the filter is able to retain its ability to separate and the oil penetration rate of the filter are revealed. The fabrication process is simple and time-saving, and the filter has high durability because of lack of surface coating or surface chemical modification.

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Pt Nanoparticle Assisted Homogeneous Surface Engineering of Polymer‐Based Bulk‐Heterojunction Photocathodes for Efficient Charge Extraction and Catalytic Hydrogen Evolution

Liu

et al. 2023

Small

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To fabricate a high‐efficiency bulk‐heterojunction (BHJ)‐based photocathode, introducing suitable interfacial modification layer(s) is a crucial strategy. Surface engineering is especially important for achieving high‐performance photocathodes because the photoelectrochemical (PEC) reactions at the photocathode/electrolyte interface are the rate‐limiting process. Despite its importance, the influence of interfacial layer morphology regulation on PEC activity has attracted insufficient attention. In this work, RuO2, with excellent conductivity, capacity and catalytic properties, is utilized as an interfacial layer to modify the BHJ layer. However, the homogeneous coverage of hydrophilic RuO2 on the hydrophobic BHJ surface is challenging. To address this issue, a Pt nanoparticle‐assisted homogeneous RuO2 layer deposition method is developed and successfully applied to several BHJ‐based photocathodes, achieving superior PEC performance compared to those prepared by conventional interface engineering strategies. Among them, the fluorine‐doped tin oxide (FTO)/J71:N2200(Pt)/RuO2 photocathode generates the best photocurrent density of −9.0 mA cm−2 at 0 V with an onset potential of up to 1.0 V under AM1.5 irradiation.

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Contact Angle Measurements for Advanced Thermal Management Technologies

Cited by 9 publications

References 39 publications

High Aspect Ratio Nanoscale Pores through BCP-Based Metal Oxide Masks and Advanced Dry Etching

High Aspect Ratio Nanoscale Pores through BCP-Based Metal Oxide Masks and Advanced Dry Etching

Fabrication of an oil–water separation copper filter using laser beam machining

Pt Nanoparticle Assisted Homogeneous Surface Engineering of Polymer‐Based Bulk‐Heterojunction Photocathodes for Efficient Charge Extraction and Catalytic Hydrogen Evolution

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