The phrase "a dual functionality" is correct and usable in written English.
It can be used to describe an object or system that serves two distinct purposes or roles.
Example: "The new smartphone offers a dual functionality, allowing users to take high-quality photos while also serving as a portable gaming device."
Alternatives: "twofold purpose" or "dual role".
The TiN interlayer has a dual functionality in our sensor structure.
In this paper we describe the development of a dual functionality film of silica (AR) and copper oxide (biocidal).
CuNPs with a dual functionality comprising geometric attributes for enhanced cell uptake and exerting cytotoxic activity on proliferating cells were synthesized as a novel drug delivery system.
The reason is that current Internet design defined a dual functionality for IP addresses: to identify hosts, nodes interfaces or content servers, and to locate them into the network.
Our results suggest a dual functionality for the members of the hPAF complex.
Thus, CTCF could be a "dual functionality" protein that has divergent effects on different gene regulation systems.
The hardware part of the system consists of a number of dual functionality devices powered with scavenged thermal energy.
Thus, one may regard SULT2A1 as a gene with dual functionality, detoxification of xenobiotics in the liver and maintaining steroid homeostasis in the adrenal; its secondary adrenal function may have been gained only during primate evolution (101).
Other features, such as a partition panel that pulls out from a wall in the living room, have dual functionality, serving as a projection screen for video art and creating a sectioned-off viewing area.
To do so, we chose a signal with potentially dual functionality which may therefore display such limitations.
From the looks of it, the rotation would give the pad dual functionality as a phone keypad and a keyboard.
