The phrase "a narrow layer" is correct and usable in written English.
It can be used to describe a thin or limited thickness of a material or substance in various contexts, such as science, geology, or cooking.
Example: "The geologist discovered a narrow layer of sediment that indicated a significant change in the environment."
Alternatives: "a thin layer" or "a slim layer".
The result was a "capitalist politburo" supporting "a narrow layer of the super-rich," while destitute people in the hinterlands, robbed of the value of their life savings by the reformers' price liberalization, froze to death in snowbanks.
It is possible, though, to create a narrow layer of electrons near the surface of the silicon crystal used to form what is known as a "metal-oxide-semiconductor field effect transistor" (MOSFET).
The rich, dense, finely diced lamb, in a gravy of root vegetables, is capped with a narrow layer of browned mashed potatoes and the wurst, perched on roasted apple-laced cabbage, benefits from its plate mates of tiny caramelized onions and boiled potatoes.
A narrow layer of As donors was implanted near the Si-SO2 interface of n-channel Si MOSFETs.
Generally, in every flow regime (laminar or turbulent), it is always possible to find a narrow layer (the viscous or laminar sub-layer) of fluid near the wall.
The human being lives in a narrow layer of reality, and, says Pavel Petrovich, the artist attempts to go from the earthly to the divine layer.
The hydrocarbons occupy a relatively narrow layer at altitudes of between 100 and 300 km corresponding to a pressure range of 10 to 0.1 mbar (1000 to 10 kPa) and temperatures of between 75 and 170 K.
The phantom echoes begin, the researchers say, when extremely energetic ultraviolet (UV) radiation from the sun strikes gas molecules in a relatively narrow layer of the upper atmosphere.
Since at atmospheric pressure the CH radical is present only in a very narrow layer at the flame front, specific problems due to the finite size of the laser beam and thermal deflection are encountered.
3.4, this method can only be applied to calculate the diffusive reflectance produced by a very narrow layer as described in [ 5].
Figure 15 is an example of simultaneous lidar measurements of Na and Fe reported by Yi et al. There is a broad high-altitude sporadic layer peaking around 110 km and a narrow sporadic layer around 96 km, above the permanent layers (which peak at 90 and 85 km for Na and Fe, respectively).
