@Article{PinheiroRoVoVaTrCo:2020:VeAlCa,
author = "Pinheiro, Rom{\'a}rio Ara{\'u}jo and Rosa, Filipe Menezes and
Vol{\'u}, Ren{\^e} Martins and Vasconcelos, Get{\'u}lio de and
Trava-Airoldi, Vladimir Jesus and Corat, Evaldo Jos{\'e}",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto de Estudos
Avan{\c{c}}ados (IEAv)} and {Instituto de Estudos
Avan{\c{c}}ados (IEAv)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Vertically aligned carbon nanotubes (VACNT) surfaces coated with
polyethylene for enhanced dew harvesting",
journal = "Diamond and Related Materials",
year = "2020",
volume = "107",
pages = "e107837",
month = "Aug.",
keywords = "Super-hydrophobicity, Dew harvesting, Carbon nanotubes,
Hierarchical condensation, Jumping condensation.",
abstract = "In this work we prepared vertically aligned carbon nanotubes
(VACNT) based super-hydrophobic surfaces with enhanced dew
condensation. Coating these VACNT with a nanometric polyethylene
(PE) layer preserved morphology, but normalized surface energy
increasing its super-hydrophobicity. Samples of as grown VACNT
with the PE coating (VACNT-PE samples) and VACNT samples treated
by CO2 laser and with PE coating (VACNT/ laser-PE samples) show a
much higher condensation for low surface temperatures (TS < 288
K). At this low temperature, it changes from a low adhesion Cassie
Baxter wetting state to a more adhesive one. Despite this larger
adhesion, water collection enlarges instead of decreasing.
Hierarchical condensation is the most likely effect contributing
for this further increase. The cage-like morphology left by laser
tracks on VACNT/laser-PE sustain larger droplets that removes all
water underneath and neighbor regions while moving. In these
conditions the volume collection is over 30 times larger than at
dew point, with a high volumetric efficiency.",
doi = "10.1016/j.diamond.2020.107837",
url = "http://dx.doi.org/10.1016/j.diamond.2020.107837",
issn = "0925-9635",
language = "en",
targetfile = "pinheiro_vertically.pdf",
urlaccessdate = "28 abr. 2024"
}