Surface modified annular wet denuder for the collection of water-soluble trace gases

Spontaneous and Directional Bubble Transport on Porous Copper Wires with Complex Shapes in Aqueous Media

“…In a gaseous atmosphere, gas may easily fill the porous structures of a rough surface. When immersed in water, the pore space on the superhydrophobic surface is filled with gas, and the multilevel micronanostructures direct the surface tension upward, allowing greater resistance to the penetration of water, thus preventing the loss of repellency. − A continuous gas film around the copper wires is therefore formed under combined action of the hydrostatic pressure, atmospheric pressure, entrapped gas Laplace pressure, and surface tension. , The gas film around the copper wires is arc-shaped with a particular radius of curvature, determined by the diameter of the copper wire and the thickness of the gas film. Thus, across the liquid–gas interface, there exists a Laplace pressure difference Δ P . where γ and R w are the tension and the curvature radius of the liquid–gas interface, respectively.…”

“…30−33 A continuous gas film around the copper wires is therefore formed under combined action of the hydrostatic pressure, atmospheric pressure, entrapped gas Laplace pressure, and surface tension. 34,35 The gas film around the copper wires is arc-shaped with a particular radius of curvature, determined by the diameter of the copper wire and the thickness of the gas film. Thus, across the liquid− gas interface, there exists a Laplace pressure difference ΔP.…”

Diurnal variations of gaseous and particulate nitrophenol isomers in the atmosphere monitored by using wet scrubbing online preconcentration

“…A parallel plate wet denuder (PPWD) made of plastic and a spray-type particle collector (PC) was developed to measure water-soluble inorganic acidic gases and anions in particles. [28][29][30][31] The PPWD/PC collection system was successfully applied even to polar organic compounds (carbonyls) to study their partitioning and diurnal variations. 32,33 Because NPs are polar and water-soluble like carbonyls, we tried to monitor gas and particle phase NPs using a PPWD/PC collection system.…”

Bioinspired Gas Bubble Spontaneous and Directional Transportation Effects in an Aqueous Medium

“…If the well‐ordered 3D macroporous interconnected network surface possesses low surface energy, it will trap gas to form a uniform gas film . It is believed that the gas film may provide the possibility to capture and transport gas bubbles directionally . Figure depicts a series of photographs on the movement of the gas bubbles with a time scale.…”