Scientists have developed an innovative method to study the metastable state of liquids with negative pressure by encapsulating them in optical fibers. This technique provides a simpler way to measure pressure using light and sound waves, paving the way for new discoveries in thermodynamics and chem
As a physical quantity pressure is encountered in various fields: atmospheric pressure in meteorology, blood pressure in medicine, or even in everyday life with pressure cookers and vacuum-sealed foods.
Overpressure always means that the gas or liquid pushes against the walls of its container from the inside, like a balloon expanding when more air is added. Regardless of whether it’s high or low pressure, the numerical value of pressure is always positive under normal circumstances.However, liquids exhibit a peculiar characteristic. They can exist in a specific metastable state corresponding to a negative pressure value.
In their current research, the scientists are examining the metastable state of liquids with negative pressure. To achieve this, the research team combined two unique techniques in a study published inInitially, tiny amounts — nanoliters — of a liquid were encapsulated in a fully closed optical fiber, allowing both highly positive and negative pressures.
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