TY - JOUR
T1 - Insect-inspired breathing interfaces
T2 - investigating robustness of coating-free gas entrapping microtextured surfaces under pressure cycles
AU - Arunachalam, Sankara
AU - Sadullah, Muhammad Subkhi
AU - Mishra, Himanshu
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/12
Y1 - 2024/12
N2 - Numerous natural and engineering scenarios necessitate the entrapment of air pockets or bubbles on submerged surfaces. Current technologies for bubble entrapment rely on perfluorocarbon coatings, limiting their sustainability. Herein, we investigated the efficacy of doubly reentrant cavity architecture towards realizing gas-entrapping microtextured surfaces under static and dynamic pressure cycling. The effects of positive (>1 atm), negative (<1 atm), and positive–negative cycles on the stability the gas entrapment inside individual doubly reentrant cavities were studied across a range of pressures, ramp rates, intercycle intervals, and water-column heights. Remarkably, the fate of the trapped air under pressure cycling fell into either of the following regimes: the bubble (i) monotonically depleted (unstable), (ii) remained indefinitely stable (stable), or (iii) started growing (bubble growth). This hitherto unrealized richness of underwater bubble dynamics should guide the development of coating-free technologies and help us understand the curious lives of air-breathing aquatic and marine insects.
AB - Numerous natural and engineering scenarios necessitate the entrapment of air pockets or bubbles on submerged surfaces. Current technologies for bubble entrapment rely on perfluorocarbon coatings, limiting their sustainability. Herein, we investigated the efficacy of doubly reentrant cavity architecture towards realizing gas-entrapping microtextured surfaces under static and dynamic pressure cycling. The effects of positive (>1 atm), negative (<1 atm), and positive–negative cycles on the stability the gas entrapment inside individual doubly reentrant cavities were studied across a range of pressures, ramp rates, intercycle intervals, and water-column heights. Remarkably, the fate of the trapped air under pressure cycling fell into either of the following regimes: the bubble (i) monotonically depleted (unstable), (ii) remained indefinitely stable (stable), or (iii) started growing (bubble growth). This hitherto unrealized richness of underwater bubble dynamics should guide the development of coating-free technologies and help us understand the curious lives of air-breathing aquatic and marine insects.
UR - http://www.scopus.com/inward/record.url?scp=85201577043&partnerID=8YFLogxK
U2 - 10.1038/s44172-024-00231-2
DO - 10.1038/s44172-024-00231-2
M3 - Article
AN - SCOPUS:85201577043
SN - 2731-3395
VL - 3
JO - Communications Engineering
JF - Communications Engineering
IS - 1
M1 - 84
ER -